Type 8792, 8793 Electropneumatic positioner and process controller Operating Instructions
We reserve the right to make technical changes without notice. Technische Änderungen vorbehalten. Sous resérve de modification techniques.
Type 8792, 8793 Contents Table of contents GENERAL INFORMATION AND SAFETY INSTRUCTIONS.....................................................................................................5 1. Operating instructions..........................................................................................................................................................6 2. Authorized use.......................................................................................................................
Type 8792, 8793 Contents 24. Activation of the process controller...........................................................................................................................82 25. Basic setting of the process controller....................................................................................................................83 AUXILIARY FUNCTIONS.......................................................................................................................................
Type 8792, 8793 General information and safety instructions Contents 1. 2. OPERATING INSTRUCTIONS.........................................................................................................................................................6 1.1. Symbols.......................................................................................................................................................................................6 1.2. Definition of the term “device”.....................
Type 8792, 8793 General Information Safety Instructions 1. OPERATING INSTRUCTIONS The operating instructions describe the entire life cycle of the device. Keep these instructions in a location which is easily accessible to every user and make these instructions available to every new owner of the device. WARNING! The operating instructions contain important safety information! Failure to observe these instructions may result in hazardous situations.
Type 8792, 8793 General Information Safety Instructions 2. AUTHORIZED USE Incorrect use of the Type 8792 and 8793 can be dangerous to people, nearby equipment and the environment. The device is designed for the open-loop control and closed-loop control of media. • If using Types 8792 and 8793 in the potentially explosive area, observe the specifications on the additional plate for Ex devices.
Type 8792, 8793 General Information Safety Instructions 3. BASIC SAFETY INSTRUCTIONS These safety instructions do not make allowance for any • contingencies and events which may arise during the installation, operation and maintenance of the devices. • local safety regulations – the operator is responsible for observing these regulations, also with reference to the installation personnel.
Type 8792, 8793 General Information Safety Instructions The Type 8792/8793 were developed with due consideration given to the accepted safety rules and are state-of-the-art. Nevertheless, dangerous situations may occur. Failure to observe this operating manual and its operating instructions as well as unauthorized tampering with the device release us from any liability and also invalidate the warranty covering the devices and accessories! 4. USE IN THE EX AREA 4.1.
Type 8792, 8793 General Information Safety Instructions 5. GENERAL INFORMATION 5.1. Scope of supply In general it consists of: • Type 8792/8793 and • associated operating instructions. - Brief instructions (Quickstart) in printed form as well as - Main instructions on CD. We will provide you with attachment kits for linear actuators or rotary actuators as accessories.
Types 8792, 8793 Description of System Contents 6. DESCRIPTION AND FEATURES OF THE TYPE 8792/8793........................................................................................13 6.1. General description............................................................................................................................................................13 6.1.1. Features...........................................................................................................................
Types 8792, 8793 Description of System 11.6. Electrical data........................................................................................................................................................................31 11.7. Pneumatic data.....................................................................................................................................................................32 11.8. Safety end positions after failure of the electrical or pneumatic auxiliary power.....
Types 8792, 8793 Description of System 6. DESCRIPTION AND FEATURES OF THE TYPE 8792/8793 6.1. General description The positioner Type 8792 / process controller Type 8793 is a digital, electro-pneumatic position controller for pneumatically actuated continuous valves. The device incorporates the main function groups - Position sensor - Electro-pneumatic control system - Microprocessor electronics The position sensor measures the current positions of the continuous valve.
Types 8792, 8793 Description of System • Mounting. on linear actuator according to NAMUR recommendation (DIN IEC 534 T6) or on rotary actuator according to VDI/VDE 3845. • Optional. Remote version for DIN rail mounting or for mounting bracket 6.1.2. Combination with valve types and mounting versions The positioner Type 8792 / process controller Type 8793 can be mounted on different continuous valves. For example on valves with piston, membrane or rotary actuator.
Types 8792, 8793 Description of System 6.1.3.
Types 8792, 8793 Description of System 6.2. Designs 6.2.1. Type 8792, positioner The position of the actuator is regulated according to the position set-point value. The position set-point value is specified by an external standard signal (or via field bus). 6.2.2. Type 8793, process controller Type 8793 also features a PID controller which, apart from actual position control, can also be used to implement process control (e.g.
Types 8792, 8793 Description of System 7. STRUCTURE The positioner Type 8792 and process controller Type 8793 consist of the micro-processor controlled electronics, the position sensor and the control system. The device is designed using three-wire technology. Operation is controlled by four keys and a 128x64 dot matrix graphics display. The pneumatic control system for single-acting and double-acting actuators consists of 2 solenoid valves. 7.1.
Types 8792, 8793 Description of System 7.2. Function diagram 7.2.1. Diagram illustrating single-acting actuator The black lines in “Figure 2” specify the function of the position controller circuit in Type 8792. The grey part of the diagram indicates the additional function of the superimposed process control circuit in Type 8793. Compressedair supply Type 8792 / 8793 Position setpoint value Continuous valve with .
Types 8792, 8793 Description of System 8. POSITIONER TYPE 8792 The position sensor records the current position (POS) of the pneumatic actuator. The positioner compares this actual position value with the set-point value (CMD) which is specified as a standard signal. If there is a control difference (Xd1), the actuator is aerated and deaerated via the control system. In this way the position of the actuator is changed until control difference is 0. Z1 represents a disturbance variable.
Types 8792, 8793 Description of System INPUT DBND INP DIR.CMD 4 – 20 mA 0 – 20 mA 0 – 10 V 0–5V SPLTRNG CHARACT DIR.ACT CUTOFF X.TIME X.LIMIT POS CMD TEMP Schematic representation of position control X.CONTROL Figure 4: CMD Schematic representation of the position control POS 8.2.
Types 8792, 8793 Description of System 8.3. Positioner software Configurable auxiliary functions Effect Correction line to adjust the operating characteristic Selection of the transfer characteristic between input signal and stroke (correction characteristic) CHARACT Sealing function CUTOFF Sense of effective direction of the controller setpoint value Valve closes tight outside the control range.
Types 8792, 8793 Description of System Configurable auxiliary functions Effect Setting display Adjustment of the display of the process level EXTRAS SERVICE For internal use only POS.SENSOR Setting interface remote path sensor (available for Type 8793 Remote only. See chapter “8.1. Positioner (position controller) Type 8793 Remote with external position sensor”.
Types 8792, 8793 Description of System 9. PROCESS CONTROLLER TYPE 8793 In the case of process controller Type 8793 the position control mentioned in Chapter “8” becomes the subordinate auxiliary control circuit; this results in a cascade control. The process controller in the main control circuit of Type 8793 has a PID function. The process set-point value (SP) is specified as set-point value and compared with the actual value (PV) of the process variable to be controlled.
DIR.CMD CHARACT DIR.ACT X.LIMIT POS X.CONTROL POS 24 English P.CONTROL PARAMETER SETUP SP + - PV SP SCALE SP PV SCALE PV CMD + 4 – 20 mA 0 – 20 mA 0 – 10 V 0–5V FILTER X.TIME Schematic representation of process control CUTOFF Figure 6: Q DBDx Schematic representation of process control TEMP SP PV CMD 9.1.
Types 8792, 8793 Description of System 9.2. Type 8793 remote operation with external position sensor In the case of this model the positioner has no position sensor in the form of a rotary position sensor, but an external remote sensor. Depending on the connection type of the path sensor, Type 8793 functions as a • Process controller or • Positioner (position controller) The following connection options are possible: Function . Type 8793 Interface sensor Setting in the menu (ADD.
Types 8792, 8793 Description of System 9.3. The process controller software Configurable auxiliary functions Effect Correction line to adjust the operating characteristic Selection of the transfer characteristic between input signal and stroke (correction characteristic) CHARACT Sealing function Valve closes tight outside the control range. Specification of the value (in %), from which the actuator is completely CUTOFF deaerated (when 0%) or aerated (when 100%).
Types 8792, 8793 Description of System Configurable auxiliary functions Effect SERVICE For internal use only Simulation software For simulation of the device functions SIMULATION DIAGNOSE (Option) Monitoring of processes POS.SENSOR Setting interface remote path sensor (available for Type 8793 Remote only. See chapter “8.1. Positioner (position controller) Type 8793 Remote with external position sensor”. Table 5: The process controller software.
Types 8792, 8793 Description of System INTERFACES OF THE POSITIONER / PROCESS CONTROLLER Inputs for position or process set-point value 4 – 20 mA 0 – 20 mA 0 – 10 V 0–5V 24 V PNP Positioner / Process controller Initiator 1 / Initiator 2 Inputs Input for process actual value* 4 – 20 mA frequency Pt 100 2 binary outputs Outputs 10.
Types 8792, 8793 Description of System 11. TECHNICAL DATA 11.1. Conformity In accordance with the Declaration of conformity, Type 8792 / 8793 is compliant with the EC Directives. 11.2. Standards The applied standards which are used to demonstrate compliance with the EC Directives are listed in the EC-Type Examination Certificate and/or the EC Declaration of Conformity. 11.3.
Types 8792, 8793 Description of System Additional plate for Ex devices: II 3 G Ex nA IIC T4 II 3 D Ex tD A22 T135°C Figure 9: Additional plate for Ex devices 11.5. Mechanical data Dimensions Warning: Devices, which may be used in the explosion-protected area, are identified by the additional plate for Ex devices. 1. Do not open under explosive atmosphere 2.
Types 8792, 8793 Description of System 11.6. Electrical data Connections 2 cable glands (M20 x 1.5) with screw-type terminals 0.14 – 1.5 mm2 or circular plug-in connector Operating voltage 24 V DC ± 10% max.
Types 8792, 8793 Description of System 11.7. Pneumatic data Control medium Quality classes in accordance with DIN ISO 8573-1 Dust content Class 5, max. particle size 40 µm, max. particle density 10 mg/m³ Water content Class 3, max. pressure dew point - 20 °C or min. 10 degrees below the lowest operating temperature Oil content Class 5, max. 25 mg/m³ Temperature range of compressed air 0 – +60 °C Pressure range 1.
Types 8792, 8793 Description of System 11.8. Safety end positions after failure of the electrical or pneumatic auxiliary power The safety end position depends on the fluidic connection of the actuator to the working connections A1 or A2. Safety end positions after failure of the Actuator system Designation pneumatic .
Types 8792, 8793 Description of System 11.9. Factory settings The factory settings can be found in Chapter “27. Operating structure and factory settings”, page 174. The factory presets are highlighted in blue to the right of the menu in the operating structure. Examples: Representation Description Menu options activated or selected at the factory Menu options not activated or selected at the factory 2.0 % 10.0 sec /....
Type 8792, 8793 Installation Contents 12. ATTACHMENT AND ASSEMBLY.................................................................................................................................................37 12.1. Safety instructions:.............................................................................................................................................................37 12.2. Attachment to a continuous valve with linear actuators according to NAMUR................................
Type 8792, 8793 Installation 15. ELECTRICAL CONNECTION - TERMINAL VERSION FOR CABLE GLAND.........................................................56 15.1. Connection board of the Type 8792/8793 with screw-type terminals....................................................57 15.2. Terminal assignment for cable gland - positioner Type 8792.....................................................................57 15.2.1. Input signals from the control centre (e.g. PLC)...........................................
Type 8792, 8793 Installation 12. ATTACHMENT AND ASSEMBLY The dimensions of the Type 8792/8793 and the different device versions can be found on the data sheet. 12.1. Safety instructions: WARNING! Risk of injury from improper installation! • Installation may be carried out by authorised technicians only and with the appropriate tools! Risk of injury from unintentional activation of the system and an uncontrolled restart! • Secure system from unintentional activation.
Type 8792, 8793 Installation 12.2. Attachment to a continuous valve with linear actuators according to NAMUR The valve position is transferred to the position sensor installed in the positioner via a lever (according to NAMUR). 12.2.1. Attachment kit for linear actuators (serial no. 787 215) (Can be purchased as an accessory from Bürkert). Part no.
Type 8792, 8793 Installation 12.2.2. Installation WARNING! Risk of injury from improper installation! • Installation may be carried out by authorised technicians only and with the appropriate tools! Risk of injury from unintentional activation of the system and an uncontrolled restart! • Secure system from unintentional activation. • Following assembly, ensure a controlled restart. Procedure: →→Using the clamping pieces ③, hexagon bolts ⑰ and circlips ⑯ attach the hoop ② to the actuator spindle.
Type 8792, 8793 Installation Legend: 17 No. 4 5 6 12 13 14 15 16 17 18 19 22 16 12 6 19 18 14 12 22 13 4 15 Figure 14: 5 Name Driver pin Conical roller Lever For a description of the numbering, refer to “Table 10: Attachment kit for linear actuators” Assembling the lever The gap between the driver pin and the shaft should be the same as the drive stroke. As a result, the lever has a swing range of 60°. (see “Figure 15”). Rotation range of the position sensor: .
Type 8792, 8793 Installation 12.2.3. Attaching mounting bracket →→Attach mounting bracket ① to the back of the Type 8792/8793 with hexagon bolts ⑨, circlip ⑩ and washers ⑪ (see “Figure 16”). The selection of the M8 thread used on the Type 8792/8793 depends on the size of the actuator. →→To determine the correct position, hold the Type 8792/8793 with mounting bracket on the actuator.
Type 8792, 8793 Installation Attaching the Type 8792/8793 with mounting bracket for actuators with columnar yoke: →→Attach mounting bracket to the columnar yoke with the U-bolt ⑦, washers ⑪, circlips ⑩ and hexagon nuts 21 (see “Figure 18”). Legend: 21 No. 7 10 11 21 10 11 7 Figure 18: Name U-bolt Circlip Washer Hexagon nut Attach Type 8792/8793 with mounting bracket; for actuators with columnar yoke 12.2.4.
Type 8792, 8793 Installation 12.3. Attachment to a continuous valve with rotary actuator The shaft of the position sensor integrated in the positioner is connected directly to the shaft of the rotary actuator. 12.3.1. Mounting kit (VDI/VDE 3845) on rotary actuator (part no. 787338) (Can be purchased as an accessory from Bürkert). Part no.
Type 8792, 8793 Installation Anti-twist safeguard: Note the flat side of the shaft! . One of the setscrews must be situated on the flat side of the shaft as an anti-twist safeguard (see “Figure 19”). Rotation range of the position sensor: The maximum rotation range of the position sensor is 180°. The shaft of the Type 8792/8793 may be moved within this range only. Ideal position for the swing range of the flattened shaft (min. 30 ° / max. 180 °).
Type 8792, 8793 Installation →→Place Type 8792/8793 with assembly bridge on the rotary actuator and attach (see “Figure 21”) Figure 21: Rotary actuator attachment If the X.TUNE ERROR 5 message is indicated on the graphics display after the X.TUNE function starts, the shaft of the Type 8792/8793 is not correctly aligned with the shaft of the actuator (see “Table 124: Error and warning message on X.TUNE”, page 231. • Check alignment (as described previously in this chapter). • Then repeat the X.
Type 8792, 8793 Installation 12.4. Remote operation with external position sensor In the case of this model, the positioner has no position sensor in the form of a rotary position sensor, but an external path sensor. Depending on the model of Type 8792/8793, there are the following connection options: Device type Interface sensor Setting in the menu . (ADD.FUNCTION) Type 8792 Remote digital (serial) Remote Sensor Type 8798 – digital (serial) Remote Sensor Type 8798 POS.
Type 8792, 8793 Installation 12.4.2. Connection and start-up of the Remote Sensor Type 8798 WARNING! Risk of injury from improper start-up! • Start-up may be carried out by authorised technicians only and with the appropriate tools! Risk of injury from unintentional activation of the system and an uncontrolled restart! • Secure system from unintentional activation. • Following assembly, ensure a controlled restart.
Type 8792, 8793 Installation 12.4.3. Connection and start-up via a 4 – 20 mA path sensor (for Type 8793 remote model only) When a 4 – 20 mA path sensor is connected, the process controller Type 8793 can be used as a positioner (position controller) only, as the process actual value input is used as input for the path sensor. In principle, any path sensor with a 4 – 20 mA output can be connected which has an adequate resolution of the path signal.
Type 8792, 8793 Installation 13. FLUID CONNECTION 13.1. Safety instructions DANGER! Risk of injury from high pressure in the equipment! • Before loosening the pneumatic lines and valves, turn off the pressure and vent the pneumatic lines.
Type 8792, 8793 Installation Procedure: →→Apply supply pressure (1.4 – 7 bar) to the supply pressure connection P. For single-acting actuators (control function A and B): →→Connect one working connection (A1 or A2, depending on required safety position) to the chamber of the single-acting actuator. Safety positions see chapter “11.8. Safety end positions after failure of the electrical or pneumatic auxiliary power”. →→Seal a working connection which is not required with a plug.
Type 8792, 8793 Installation 14.
Type 8792, 8793 Installation 14.1. Type 8792 - designation of the circular plug-in connectors Operating voltage and diverse signals 2 Binary outputs optional 1 8 3 7 4 3 1 6 2 5 Functional earth FE X1 - M12, 8-pole circular connector 4 X4 - M8, 4-pole socket Figure 24: Type 8792; designation of the circular plug-in connectors and contacts 14.2. Connection of the positioner Type 8792 →→Connect pins according to the model (options) of the positioner. 14.2.1.
Type 8792, 8793 Installation 14.2.2. X4 - M8, 4-pole socket (for binary outputs option only) Output signals to the control centre (e.g. PLC) Pin Configuration On the device side External circuit / Signal level 1 Binary output 1 1 0 – 24 V 2 Binary output 2 2 0 – 24 V 3 Binary output GND 3 GND (identical with the GND operating voltage) Table 14: Pin assignment; X4 - M8, 4-pole socket - output signals to the control centre When the operating voltage is applied, the positioner is operating.
Type 8792, 8793 Installation 14.3.
Type 8792, 8793 Installation 14.4. Connecting the process controller Type 8793 →→First connect the process controller as described in chapter “14.2. Connection of the positioner Type 8792”. 14.4.1.
Type 8792, 8793 Installation 15.
Type 8792, 8793 Installation 15.1. 1 2 3 4 +24 V GND 83 + 85 + 31 + 32 – 11 + 12 – 81 + Figure 27: Connection board of the Type 8792/8793 with screw-type terminals Optional: S+ S– A B Designation of the screw-type terminals Procedure: →→Unscrew the 4 screws on the housing cover and remove the cover. The screw-type terminals are now accessible. →→Connect Type 8792/8793. The procedure is described in the following chapters. for Type 8792: chapter “15.2.
Type 8792, 8793 Installation 15.2.2. Output signals to the control centre (e.g. PLC) (required for analogue output and/or binary output option only) →→Connect terminals according to the model (options) of the positioner.
Type 8792, 8793 Installation Connection of a potentiometric position sensor: Terminal Table 20: Configuration On the device side Potentiometer 1 1 Center tap 2 2 Potentiometer 3 3 External circuit Potentiometer Center tap Terminal assignment; potentiometric position sensor When the operating voltage is applied, the positioner is operating. →→Now make the required basic settings and actuate the automatic adjustment of the positioner. The procedure is described in chapter “21.
Type 8792, 8793 Installation Pt 100 (see information below) actual value Frequency - externally supplied Terminal Configuration actual value Input type* 1 not used 2 Clock input + 3 not used 4 On the device side External circuit 2 Clock + Clock input – 4 Clock – 1 not used 2 2 Process actual 1 (Power supply) 3 Process actual 3 (GND) 4 Process actual 2 (Compensation) Pt 100 3 4 * Can be adjusted via software (see chapter“21. Start-up sequence”).
Type 8792, 8793 Operation Contents 16. OPERATING LEVELS........................................................................................................................................................................62 16.1. Switching between the operating levels.................................................................................................................62 17. OPERATING AND DISPLAY ELEMENTS........................................................................................
Type 8792, 8793 Operation 16. OPERATING LEVELS There is the process level and the setting level for the operation and setting of type 8792/8793. Process level:. The running process is displayed and operated on the process level. Operating state: AUTOMATIC – Displaying the process data MANUAL – Manually opening and closing the valve Setting level:. The basic settings for the process are made on the setting level.
Type 8792, 8793 Operation 17. OPERATING AND DISPLAY ELEMENTS The following chapter describes the operating and display elements of Type 8792/8793. 17.1. Description of the operating and display elements The device is operated by four keys and a 128x64 dot matrix graphics display. The display is adjusted to the set functions and operating levels. In principle, a distinction can be made between the display view for the process level and the setting level.
Type 8792, 8793 Operation Display elements of the setting level: Menu designation Submenu Operating elements: Designation for the function of the keys Right selection key Arrow key , down arrow Arrow key , up arrow Left selection key Figure 30: Display and operating elements of the setting level 17.1.1.
Type 8792, 8793 Operation 17.2. Function of the keys The functions of the 4 operating keys differ depending on the operating state (AUTOMATIC or MANUAL) and operating level (process level or setting level). The key function which is active is displayed in the gray text field which is above the key. The description of the operating levels and operating states can be found in Chapter "16. Operating levels" and "18. Operating states".
Type 8792, 8793 Operation 17.2.1. Entering and changing numerical values Changing numerical values with fixed decimal places: Key function Key Description of the function Arrow key Change to the next decimal place (from right to left). After reaching the last decimal place, the display switches back to the first decimal place. Arrow key Increase value. When the largest possible value has been reached, 0 is displayed again. Left selection key ESC Example Enter date and time.
Type 8792, 8793 Operation 17.3. Adjusting the display The display can be individually adjusted for the operation and monitoring of the process. • To do this, menu options can be activated for displaying the process level. POS and CMD are activated in the as-delivered state. • The menu options which can be displayed depend on the type. How you can adjust the display for Type 8792 individually to the process to be controlled is described in Chapter "26.2.18. EXTRAS – Setting the display", page 140 ". 17.
Type 8792, 8793 Operation Possible displays in AUTOMATIC operating state Graphical display of POS and CMD with time axis MENU CMD / POS (t) HOLD CLOCK 12:0000 Time, weekday and date Thu. 01 . 09 . 11 MENU INPUT X.TUNE INPUT INPUT mA MENU CMD/POS 4.0 Only for operation as position controller CLOCK Automatic adjustment of the position controller X.TUNE MENU CLOCK Input signal for set-point position (0 ... 5/10 V or 0/4 ...
Type 8792, 8793 Operation 17.4. Date and time Date and time are set on the process level in the CLOCK menu. To ensure that the input menu for CLOCK can be selected on the process level, the following functions must be activated in 2 stages: 1. The EXTRAS auxiliary function in the ADD.FUNCTION menu 2. The CLOCK function in the EXTRAS auxiliary function, DISP.ITEMS submenu. Activating EXTRAS and CLOCK: Key MENU Action Description Press Switching from process level for approx. 3 s setting level.
Type 8792, 8793 Operation 17.4.1. Setting date and time: →→On the process level select →→Press INPUT the display for CLOCK using the arrow keys. to open the input screen for the setting. →→Set date and time as described in the following table. Key function Key Description of the function Switch to the next time unit (from right to left). When the last time unit for the date has been reached, the display switches to the time units for the time.
Type 8792, 8793 Operation 18. OPERATING STATES Type 8792/8793 has 2 operating states: AUTOMATIC and MANUAL. When the operating voltage is switched on, the device is in the AUTOMATIC operating state. 0.0 POS MENU CMD In the AUTOMATIC operating state normal controlled operation is implemented. is shown on the display. (The symbol for AUTOMATIC (A bar runs along the upper edge of the display). POS MANU 0.
Type 8792, 8793 Operation 19. ACTIVATING AND DEACTIVATING AUXILIARY FUNCTIONS Auxiliary functions can be activated for demanding control tasks. The auxiliary function is activated via the ADD.FUNCTION basic function and transferred to the main menu (MAIN). The auxiliary functions can then be selected and set in the extended main menu (MAIN). 19.1.1. Activating auxiliary functions Procedure: Key Action MENU Press Description for approx. 3 s Switching from process level setting level. Select ADD.
Type 8792, 8793 Operation 19.1.1.1. Principle: Activating auxiliary functions with simultaneous incorporation into the main menu Functions in the main menu (Standard) Setting level INPUT MAIN INPUT X.TUNE ADD.FUNCTION EXIT 7 X.TUNE ENTER ADD.FUNCTION Activating the auxiliary function ENTER CHARACT EXTRAS EXIT DIAGNOSE Extended main menu MAIN X.TUNE ADD.FUNCTION CARACT X.CONTROL 15 EXIT INPUT X.TUNE ENTER ADD.
Type 8792, 8793 Operation 20. MANUALLY OPENING AND CLOSING THE VALVE In the MANUAL operating state, the valve can be opened and closed manually The MANUAL operating state (key function MANU using the arrow keys. ) is for the following process value displays: • POS, actual position of the valve actuator. • CMD, set-point position of the valve actuator. When switching to MANUAL operating state, POS is displayed. • PV, process actual value. • SP, process set-point value.
Type 8792, 8793 Contents Start-Up 21. START-UP SEQUENCE...................................................................................................................................................................76 22. SAFETY INSTRUCTIONS...............................................................................................................................................................76 23. BASIC SETTING OF THE DEVICE...................................................................
Type 8792, 8793 Start-Up 21. START-UP SEQUENCE Before start-up, carry out fluid and electrical installation of Type 8792/8793 and of the valve. For description see Chapter "13", "14" and "15". When the operating voltage is applied, Type 8792/8793 is operating and is in the AUTOMATIC operating state. The display shows the process level with the values for POS and CMD.
Type 8792, 8793 Start-Up 23. BASIC SETTING OF THE DEVICE The following settings must be made for the basic setting of Type 8792/8793: 1. INPUT Selection of the input signal (see Chapter "23.1"). 2. X.TUNE Automatic self-parameterization of the position controller (see Chapter "23.2") Operating structure for the basic setting: Process level (values are displayed) MENU Press for approx. 3 s Setting level.
Type 8792, 8793 Start-Up 23.1. INPUT - Setting the input signal This setting is used to select the input signal for the set-point variable. Procedure: Key MENU Action Description Press Switching from process level for approx. 3 s setting level. Select INPUT / ENTER / The possible input signals for INPUT are displayed. Press Select input signal (4-20 mA, 0-20 mA,....) SELEC Press The selected input signal is now marked by a filled circle EXIT Press Return to the main menu (MAIN).
Type 8792, 8793 Start-Up 23.2. X.TUNE – Automatic adjustment of the position controller WARNING! Danger due to the valve position changing when the X.TUNE function is run! When the X.TUNE function is run under operating pressure, there is an acute risk of injury. • Never run X.TUNE while the process is running! • Secure system against unintentional activation! NOTE! An incorrect supply pressure or incorrectly connected operating medium pressure may cause the . controller to be wrongly adjusted! • Run X.
Type 8792, 8793 Start-Up Operating structure: Process level (values are displayed) MENU Press for approx. 3 s Setting level INPUT Automatic self-parameterization X.TUNE RUN Hold down as long as countdown (5 ...) is running X.TUNE STARTED TUNE #0 INIT X.TUNE READY EXIT ADD.FUNCTION EXIT Figure 34: Operating structure X.TUNE Automatically determining dead band DBND by running X.TUNE: When X.
Type 8792, 8793 Start-Up X.TUNE ERROR 4 Control system aeration side leaking Not possible, device defective X.TUNE ERROR 5 The rotation range of the position sensor is exceeded by 180° Correct attachment of the position sensor shaft on the actuator (see chapter "12.2" and "12.3"). X.TUNE ERROR 6 The end positions for POS-MIN and POS-MAX are too close together Check compressed air supply X.
Type 8792, 8793 Start-Up 24. ACTIVATION OF THE PROCESS CONTROLLER The process controller is activated by selecting the P.CONTROL auxiliary function in the ADD.FUNCTION menu. The activation transfers P.CONTROL into the main menu (MAIN) where it is available for further settings. Procedure: Key Action MENU Press Description for approx. 3 s Switching from process level setting level. Select ADD.FUNCTION / ENTER The possible auxiliary functions are displayed. Press Select P.
Type 8792, 8793 Start-Up 25. BASIC SETTING OF THE PROCESS CONTROLLER 25.1. P.CONTROL – Setting up and parameterization of the process controller To start up the process controller, you must make the following settings in the P.CONTROL menu: 1. SETUP 2. PID.PARAMETER Set up the process controller (configuration) Parameterize process controller Operating structure: P.CONTROL ENTER PID.PARAMETER ENTER EXIT EXIT SETUP ENTER DBND 0.1 % KP 0.00 TN 0.5 TV 0.0 X0 0.
Type 8792, 8793 Start-Up Procedure: Key MENU / ENTER Action Press Description for approx. 3 s Switching from process level setting level. Select P.CONTROL Selection in the main menu (MAIN). Press The submenu options for basic settings can now be selected. 1. Set up process controller (configuration) / Select SETUP ENTER Press The menu for setting up the process controller is displayed. Set up is described in Chapter "25.2. SETUP – Setting up the process controller". EXIT Press Return to P.
Type 8792, 8793 Start-Up 25.2. SETUP – Setting up the process controller These functions specify the type of control. The procedure is described in the following Chapters "25.2.1" to "25.2.5". 25.2.1. PV-INPUT – Specifying signal type for the process actual value One of the following signal types can be selected for the process actual value: • Standard signal 4 ... 20 mA flow rate, pressure, level • Frequency signal 0 ... 1000 Hz flow rate • Circuit with Pt 100 -20 °C ...
Type 8792, 8793 Start-Up PV-SCALE – Scaling of the process actual value 25.2.2. The following settings are specified in the submenu of PV-SCALE: 1. The physical unit of the process actual value. 2. Position of the decimal point of the process actual value. 3. Lower scaling value of the process actual value. PVmin In PVmin the unit of the process actual value and the position of the decimal point are specified for all scaling values (SPmin, SPmax, PVmin, PVmax).
Type 8792, 8793 Start-Up 25.2.2.1. Effects and dependencies of the settings of PV-INPUT on PV-SCALE The settings in the PV-SCALE menu have different effects, depending on the signal type selected in PV-INPUT. Even the selection options for the units of the process actual value (in PVmin) depend on the signal type selected in PV-INPUT.
Type 8792, 8793 Start-Up For internal set-point value default (SP-INPUT → internal), the process set-point value is input directly on the process level. Example of a sensor calibration for frequency signal type: Pulses Scaling: Flow-rate 100 K-factor (pulses/liter) 0 Figure 39: 10 Process actual value: 100 pulses correspond to 10 liters Process set-point value: K-factor 1.
Type 8792, 8793 Start-Up Key Action Description 3. Setting K-factor (only available for frequency signal type) Select K-factor / ENTER Press The submenu for the setting of the K-factor is displayed. Select VALUE Manual input of the K-factor. Press The input screen is opened. The decimal point has a dark background. either / INPUT <– <– / Select decimal point Specify position of the decimal point. Select value The last digit of the value has a dark background.
Type 8792, 8793 Start-Up 25.2.3. SP-INPUT – Type of the set-point value default (internal or external) The SP-INPUT menu specifies how the default of the process set-point value is to be implemented.
Type 8792, 8793 Start-Up Operating structure: SP-SCALE ENTER EXIT Figure 41: SPmin SPmax INPUT INPUT Input lower process set-point value OK Input upper process set-point value OK * * Operating structure SP-SCALE Scaling process set-point value SETUP → SP-SCALE: Key Action Description Select SP-SCALE / ENTER The submenu options for scaling of the process set-point value are displayed. Press Select SPmin / INPUT / <– OK The input screen is opened.
Type 8792, 8793 Start-Up 25.2.5. P.CO-INIT – Smooth switchover MANUAL-AUTOMATIC The smooth switchover between the MANUAL and AUTOMATIC states can be activated or deactivated in the P.CO-INIT menu. Factory default setting: bumpless Smooth switchover activated. Operating structure: SELEC P.CO-INIT Figure 42: ENTER bumpless Smooth switchover activated EXIT standard Smooth switchover deactivated Operating structure P.CO-INIT Procedure: Key / Action Description Select P.
Type 8792, 8793 Start-Up PID.PARAMETER – Parameterizing the process controller 25.3. The following control parameters of the process controller are manually set in this menu. DBND 1.0 % Insensitivity range (dead band) of the process controller KP 1.00 Amplification factor of the (P-contribution of the PID controller) TN 999.0 TV 0.0 X0 0.
Type 8792, 8793 Start-Up 25.3.2. DBND – Insensitivity range (dead band) This function causes the process controller to respond from a specific control difference only. This protects both the solenoid valves in Type 8792/8793 and the pneumatic actuator. Factory setting: 1.0 % with reference to the range of the scaled process actual value (setting in the menu PV-SCALE → PVmin → PVmax). Operating structure: PID.PARAMETER DBND 1.
Type 8792, 8793 Start-Up 25.3.4. TN – Reset time of the process controller The reset time specifies the I-contribution of the PID controller (can be set with the aid of the P.TUNE function). Factory setting: 999.9 s Operating structure: PID.PARAMETER ENTER DBND 1.0 % TN EXIT Figure 46: 25.3.5. 999.9 FILTER OK INPUT 0 Input value ESC Adjustment range: 0.5 ... 999.
Type 8792, 8793 Start-Up 25.3.7. FILTER – Filtering of the process actual value input The filter is valid for all process actual value types and has a low pass behavior (PT1). Factory setting: 0 Operating structure: PID.PARAMETER DBND 1.0 % ENTER FILTER EXIT 0 OK INPUT Input value ESC Adjustment range: 0 ...
Type 8792, 8793 Start-Up P.Q‘LIN – Linearization of the process characteristic 25.4. This function automatically linearizes the process characteristic. In doing so, the nodes for the correction characteristic are automatically determined. To do this, the program moves through the valve stroke in 20 steps and measures the associated process variable. The correction characteristic and the associated value pairs are saved in the menu option CHARACT → FREE.
Type 8792, 8793 Start-Up 25.5. P.TUNE – Self-optimization of the process controller This function can be used to automatically parameterize the PID controller integrated in the process controller. In doing so, the parameters for the P, I and D-contribution of the PID controller are automatically determined and transferred to the corresponding menus of (KP, TN, TV). This is where they can be viewed and changed.
Type 8792, 8793 Start-Up 25.5.2.1. Preparatory measures for execution of P.TUNE in the MANUAL operating state Moving process actual value PV to the operating point: Key Action Description Setting on the process level: / MANU Select PV The process actual value PV is indicated on the display. Press Change to MANUAL operating state. The input screen for manually opening and closing the valve is displayed.
Type 8792, 8793 Start-Up To observe PV, it is recommended to select via the arrow keys / the graphical display SP/PV(t). To be able to select the display SP/PV(t), it must be activated in the EXTRAS menu (see Chapter "26.2.18. EXTRAS – Setting the display". →→If PV oscillates continuously, the preset amplification factor of the process controller KP in the menu P.CONTROL → PID.PARAMETER should be reduced. →→As soon as the process actual value PV is constant, the P.TUNE function can be started. 25.5.
Type 8792, 8793 Start-Up Possible error messages when running P.TUNE: Display Cause of fault Remedial action TUNE err/break Manual termination of self-optimization by pressing the EXIT key. P.TUNE ERROR 1 No supply pressure connected. Connect supply pressure. No change to process variable. Check process and, if required, switch on pump or open the shut-off valve. Check process sensor. Table 51: P.
Type 8792, 8793 Start-Up 102 English
Type 8792, 8793 Auxiliary functions Contents 26. CONFIGURING THE AUXILIARY FUNCTIONS................................................................................................................ 105 26.1. Activating and deactivating auxiliary functions................................................................................................. 105 26.1.1. Including auxiliary functions in the main menu........................................................................ 105 26.1.2.
Type 8792, 8793 Auxiliary functions 26.3. Manual configuration of X.TUNE ....................................................................................................................... 168 26.3.1. Description of the menu for the manual configuration of X.TUNE......................................
Type 8792, 8793 Auxiliary functions 26. CONFIGURING THE AUXILIARY FUNCTIONS The device has auxiliary functions for demanding control tasks. This chapter describes how the auxiliary functions are activated, set and configured. 26.1. Activating and deactivating auxiliary functions The required auxiliary functions must be activated by the user initially by incorporation into the main menu (MAIN). The parameters for the auxiliary functions can then be set.
Type 8792, 8793 Auxiliary functions 26.1.2. Removing auxiliary functions from the main menu If a function is removed from the main menu, the settings implemented previously under this function become invalid again. Procedure: Key Action MENU Press Description for approx. 3 s Switching from process level setting level. Select ADD.FUNCTION / ENTER / The possible auxiliary functions are displayed.
Type 8792, 8793 Auxiliary functions 26.2. Overview and description of the auxiliary functions ADD.FUNCTION ENTER CHARACT CUTOFF Sealing function for positioner DIR.CMD Sense of effective direction between input signal and setpoint position DIR.ACT Assignment of the aeration state of the actuator chamber to the actual position SPLTRNG * Signal split range; input signal as a % for which the valve runs through the entire stroke range. X.LIMIT Limit the mechanical stroke range X.
Type 8792, 8793 Auxiliary functions 26.2.1. CHARACT – Select the transfer characteristic between input signal (position set-point value) and stroke Characteristic (customer-specific characteristic) Use this auxiliary function to select a transfer characteristic with reference to set-point value (nominal position, CMD) and valve stroke (POS) for correction of the flow-rate or operating characteristic.
Type 8792, 8793 Auxiliary functions Standardised valve stroke [%] (POS) Position set-point value [%] CMD Figure 53: Characteristics In the case of control tasks for closed-loop control systems it is usually particular demands which are placed on the course of the operating characteristic, e.g. linearity. For this reason it is occasionally necessary to correct the course of the operating characteristic in a suitable way.
Type 8792, 8793 Auxiliary functions Procedure: Key Action MENU Description for approx. 3 s Press Select CHARACT / Switching from process level setting level. (To do this, the auxiliary function must be incorporated into the main menu). Menu options of CHARACT are displayed. ENTER Select FREE / SELEC Press The graphical display of the characteristic is displayed. INPUT Press Submenu with the individual nodes (as %) is opened.
Type 8792, 8793 Auxiliary functions Example of a programmed characteristic Valve stroke [%] (POS) 100 90 80 70 60 50 40 30 20 10 0 10 20 30 40 50 60 70 80 90 100 Standard signal [%] (CMD) 4 ... 20 mA 0 ... 20 mA 0 ... 10 V 0 ... 5 V Figure 55: Example of a programmed characteristic In the section “Tables for customer-specific settings” in chapter “42.1.
Type 8792, 8793 Auxiliary functions 26.2.2. CUTOFF – Sealing function This function causes the valve to be sealed outside the control area. This is where you input the limits for the position set-point value (CMD) as a percentage, from which the actuator is fully deaerated or aerated. Controlled operation opens or resumes at a hysteresis of 1 %. If the process valve is in the sealing area, the message „CUTOFF ACTIVE“ is indicated on the display.
Type 8792, 8793 Auxiliary functions Valve stroke [%] (POS) Adjustable from 75 ... 100 % Set-point value [%] (CMD) einstellbar von 0 ...
Type 8792, 8793 Auxiliary functions 26.2.3. DIR.CMD – Sense of effective direction of the positioner set-point value Use this auxiliary function to set the sense of effective direction between the input signal (INPUT) and the nominal position (CMD) of the actuator. Each auxiliary function, which is to be set, must be incorporated initially into the main menu (MAIN). See Chapter “26.1. Activating and deactivating auxiliary functions”. Factory setting: Rise DIR.
Type 8792, 8793 Auxiliary functions 26.2.4. DIR.ACT – Sense of effective direction of the actuator drive Use this auxiliary function to set the sense of effective direction between the aeration state of the actuator and the actual position (POS). Factory setting: Rise DIR.ACT Figure 60: ENTER Rise EXIT Fall SELEC Direct effective direction (deaerated → 0 %; aerated 100 %) Inverse effective direction (deaerated → 100 %; aerated 0%) Operating structure DIR.
Type 8792, 8793 Auxiliary functions 26.2.5. SPLTRNG – Signal split range Min. and max. values of the input signal as % for which the valve runs through the entire stroke range. Factory setting: Min = 0 %; Max = 100 % Type 8793: The SPLTRNG auxiliary function can only be selected when operating as a positioner (position controller). P.CONTROL = not activated. Use this auxiliary function to limit the position set-point value range of the Type 8792/8793 by specifying a minimum and a maximum value.
Type 8792, 8793 Auxiliary functions 26.2.6. X.LIMIT – Limits the mechanical stroke range This auxiliary function limits the (physical) stroke to specified % values (minimum and maximum). In doing so, the stroke range of the limited stroke is set equal to 100 %. If the limited stroke range is left during operation, negative POS values or POS values greater than 100 % are indicated. Factory setting: X.
Type 8792, 8793 Auxiliary functions 26.2.7. X.TIME – Limiting the control speed Use this auxiliary function to specify the opening and closing times for the entire stroke and limit the control speeds. When the X.TUNE function is running, the minimum opening and closing time for the entire stroke is automatically entered for Open and Close. Therefore, movement can be at maximum speed. Factory setting: values determined at the factory by the X.
Type 8792, 8793 Auxiliary functions 26.2.8. X.CONTROL – Parameterization of the positioner This function can be used to re-adjust the parameters of the positioner. The re-adjustment should only be made if it is required for the application. The parameters for X.CONTROL are automatically set with the exception of DBND (dead band) when specifying the basic settings by running X.TUNE.
Type 8792, 8793 Auxiliary functions Xd1‘ Position setpoint value Control difference Xd1 Position actual value Figure 69: Xd1 to the controller Xd1‘ Dead zone Graph - X.CONTROL 26.2.9. P.CONTROL – Setting up and parameterization of the process controller Parameterization of the process controller is described in Chapter “25.1. P.
Type 8792, 8793 Auxiliary functions 26.2.10. SECURITY – Code protection for the settings Use the SECURITY function to prevent the Type 8792/8793 or individual functions from being accessed unintentionally. Factory setting: Access Code: 0000 If the code protection is activated, the code (set access code or master code) must be input whenever operator action is disabled.
Type 8792, 8793 Auxiliary functions Setting the code protection: Key Action MENU / ENTER Press Description for approx. 3 s setting level. Select SECURITY (To do this, the auxiliary function must be incorporated into the main menu). Press The input screen for the access code (Access Code) is displayed. / Select decimal place Increase number OK Switching from process level Enter code.
Type 8792, 8793 Auxiliary functions 26.2.11. SAFEPOS – Input the safety position This function specifies the actuator safety position which is started at defined signals. The set safety position is only started • if there is a corresponding signal on the binary input (Configuration see chapter “26.2.13. BINARY.IN – Activation of the binary input”) or • if a signal fault occurs (Configuration see chapter “26.2.12. SIG.ERROR – Configuration of signal level fault detection”).
Type 8792, 8793 Auxiliary functions 26.2.12. SIG.ERROR – Configuration of signal level fault detection The SIG-ERROR function is used to detect a fault on the input signal. If signal fault detection is activated, the respective fault is indicated on the display. (See Chapter “35.1. Error messages on the display”. A fault detection on the input signal is only possible for signal types 4 -20 mA and Pt 100. The particular menu branch is hidden for other signal types. • 4 - 20 mA: Fault if input signal (≤ 3.
Type 8792, 8793 Auxiliary functions 26.2.12.1. Behavior of the actuator when safety position deactivated or activated Selection SafePos off – The actuator remains in the position which corresponds to the set-point value last transferred (default setting). Selection SafePos on – Approaching the safety position activated: In the event of a signal fault detection, the behavior of the actuator depends on the activation of the SAFEPOS auxiliary function. See Chapter “26.2.11.
Type 8792, 8793 Auxiliary functions SafePos – Approaching a safety position: The behavior of the actuator depends on the activation of the SAFEPOS auxiliary function. See Chapter “26.2.11. SAFEPOS – Input the safety position”. SAFEPOS activated: The actuator moves to the safety position which is specified in the SAFEPOS auxiliary function. SAFEPOS deactivated: The actuator moves to the safety end position which it would assume if the electrical and pneumatic auxiliary power failed. See Chapter “11.8.
Type 8792, 8793 Auxiliary functions 26.2.14. OUTPUT – Configuring the outputs (option) The OUTPUT menu option is only indicated in the selection menu of ADD.FUNCTION if the Type 8792/8793 has outputs (option).
Type 8792, 8793 Auxiliary functions 26.2.14.2. OUT BIN1 / OUT BIN2 - Configuring the binary outputs The following description is valid for both binary outputs OUT BIN 1 and OUT BIN 2, as the operation in the menu is identical. The binary outputs 1 and 2 can be used for one of the following outputs: POS.Dev POS.Lim-1/2 Safepos Exceeding the permitted control deviation Current position with respect to a specified limit position (> or <) Actuator in safety position ERR.
Type 8792, 8793 Auxiliary functions OUT BIN1 OUT BIN2 Alarm output for exceeding the permitted control deviation Tolerance for the SELEC Input value permitted control Deviation: deviation POS.Dev ENTER OK Adjustment range: 1 ... 50 %** * Output: current position with respect to a specified limit position Input the limit SELEC Input value position Limit: Adjustment range: 0 ... 100 % OK * POS.
Type 8792, 8793 Auxiliary functions 26.2.14.3. Setting of the submenu options of OUT BIN 1 / OUT BIN 2 Key MENU / Action Press Description for approx. 3 s Select OUTPUT ENTER Table 58: setting level. (To do this, the auxiliary function must be incorporated into the main menu). The outputs are displayed. ENTER / Switching from process level Select OUT BIN1/2 Submenu options of OUT BIN 1/2 are displayed. Press OUT BIN1 / OUT BIN2; opening the submenu • POS.
Type 8792, 8793 Auxiliary functions • Safepos - Outputting the message: Actuator in safety position • ERR.SP/CMD - Outputting the message: Sensor break for process set-point value/set-point position. Only available if the function in the SIG.ERR menu has been activated (SIG.ERR → SP/CMD input → Error on). See Chapter “26.2.12. SIG.ERROR – Configuration of signal level fault detection”. • ERR.PV - Outputting the message: Sensor break for process actual value (only for Type 8793).
Type 8792, 8793 Auxiliary functions • OUT.type - Setting the switching status . In addition to selecting the output, the switching status required for the binary output must be input. See “Table 63”. Key Action Description Select OUT.type / SELEC / The switching statuses normally open and normally closed are displayed. Press Select switching status SELEC Press The selection is marked by a filled circle EXIT Press Acknowledgment and simultaneous return to the OUT BIN 1/2 menu.
Type 8792, 8793 Auxiliary functions 26.2.15. CAL.USER – Calibration of actual value and set-point value The following values can be manually calibrated with this function: • Position actual value calibr. POS (0 - 100 %) • Position set-point value calibr. INP (4 - 20 mA, 0 - 20 mA, 0 - 5 V, 0 - 10 V) For the calibration process the signal type is displayed which was specified for the input signal. See Chapter “23.1. INPUT - Setting the input signal”.
Type 8792, 8793 Auxiliary functions CAL.USER ENTER calibr. POS POS. pMIN ENTER INPUT Input value (POS.lower:) OK POS. pMAX EXIT INPUT * Input value (POS.upper:) OK * Only for positioner Type 8792. (or for Type 8793 if P.CONTROL not activated). calibr. INP ENTER INP 4mA 0** INPUT Create and confirm minimum value OK INP 20mA 0** EXIT INPUT * Create and confirm maximum value OK * Only for process controller Type 8793 (if P.CONTROL activated): calibr.
Type 8792, 8793 Auxiliary functions 26.2.15.1. Calibration of the position actual value and the position setpoint value Key MENU / Action Press Description for approx. 3 s Select CAL.USER Switching from process level setting level. (To do this, the auxiliary function must be incorporated into the main menu). The submenu options are displayed. ENTER calibr. POS - Calibration of the position actual value (0 - 100 %): / ENTER / INPUT Select calibr.POS Select POS.
Type 8792, 8793 Auxiliary functions 26.2.15.2. Calibration of the process set-point value and process actual value Key MENU / Action Press Description for approx. 3 s Select CAL.USER Switching from process level setting level. (To do this, the auxiliary function must be incorporated into the main menu). The submenu options are displayed. ENTER calibr. SP - calibration of the process set-point value: / Select calibr.
Type 8792, 8793 Auxiliary functions 26.2.15.3. Resetting the settings under CAL.USER to the factory settings Key Action MENU Press Description for approx. 3 s Select CAL.USER / Switching from process level setting level. (To do this, the auxiliary function must be incorporated into the main menu). The submenu options are displayed. ENTER Select copy FACT->USER / RUN Hold down as long as countdown (5 ...) is running The settings of CAL.USER are reset to the factory settings.
Type 8792, 8793 Auxiliary functions 26.2.16. SET.FACTORY – Resetting to the factory settings This function allows all settings implemented by the user to be reset to the delivery status. All EEPROM parameters with the exception of the calibration values are reset to default values. Then a hardware reset is implemented. Hold down as long as countdown (5 ...) is running SET.FACTORY Figure 78: RUN factory reset Operating structure SET.
Type 8792, 8793 Auxiliary functions 26.2.17. SER. I\O – Settings of the serial interface This function can be used to set the type of the serial interface and the baud rate. SELEC SER. I/O ENTER I/O.MODE ENTER HART Burst EXIT Auto ENTER 1200 Automatic switchover to HART/Burst SELEC BAUDRATE 2400 4800 9600 19200 EXIT 38400 SELEC EXIT SERIAL.CONFIG ENTER NONE par.,1Stop EVEN par.,1Stop ODD par.,1Stop NONE par.,2Stop EVEN par.,2Stop EXIT Figure 79: ODD par.,2Stop Operating structure SER.
Type 8792, 8793 Auxiliary functions 26.2.18. EXTRAS – Setting the display This function can be used to individually set the display. • The type of display is selected via DISP.MODE. normal = black font on light background. inverse = white font on dark background. • In DISP.ITEMS the display of the process level can be individually set. To do this, further menu options can be activated for the display of the process level. POS and CMD are activated in the as-delivered state. • In START-UP.
Type 8792, 8793 Auxiliary functions Key Action Description Select EXTRAS / ENTER The submenus of EXTRAS are displayed. Press Select DISP. ITEMS / ENTER The possible menu options are displayed. POS, CMD, CMDIPOS, CMD/POS(t), CLOCK, INPUT, TEMP, X.TUNE. Press Additionally for process controller Type 8793: PV, SP, SPlPV, SP/PV(t), P.TUNE, P.LIN. / Select required menu options SELEC Press Activate the selection by checking the box unchecking the box . EXIT Press Return to the EXTRAS menu.
Type 8792, 8793 Auxiliary functions 26.2.19. POS.SENSOR – Setting interface remote path sensor The interface for the connection of an external path sensor can be selected in this menu. The POS.SENSOR menu option is available for Type 8793 Remote only. The following connection options are possible: Interface sensor Setting in the menu (ADD.FUNCTION) digital (serial) Remote sensor Type 8798. POS.SENSOR → DIGITAL analog (4 - 20 mA) * Any, high-resolution path sensor. POS.
Type 8792, 8793 Auxiliary functions 26.2.21. SIMULATION – Menu for simulation of set-point value, process and process valve This function can be used to simulate set-point value, process and process valve independently of each other. Caution! Restarting the device deactivates the simulation. The settings of SIGNAL.form, x.SIM and p.SIM are reset to the factory setting. Simulation of set-point value SIMULATION ENTER SIGNAL.sim ENTER SELEC SIGNAL.
Type 8792, 8793 Auxiliary functions 26.2.21.1. SIGNAL.sim – Simulation of the set-point value The settings to simulate the set-point value are made in the SIGNAL.sim menu. Activation of the simulation: In the SIGNAL.form submenu by selecting one of the following waveforms Sine Sine wave Square Square wave Triangle Triangle wave Mixed Single cycle of an alternating signal sequence. Then the selection is set to External (set-point value simulation inactive).
Type 8792, 8793 Auxiliary functions Key / ENTER / ENTER / Action Description Select SIGNAL.sim The submenu for activating and parameterizing the set-point value simulation is displayed. Press Select SIGNAL.form Press The menu options for activating and for selecting the waveform are displayed. Select required menu option Selection Externally = simulation inactive. Selection Sine / Square / Triangle / Mixed = specify the waveform as well as activation of the simulation.
Type 8792, 8793 Auxiliary functions 26.2.21.2. CONTROL.sim – Simulation of the process and process valve The settings to simulate the process and the process valve are made in the CONTROL.sim menu. Settings Type of simulation: Parameterization of the process: x.SIM Simulation of the process valve. p.SIM Simulation of the process. SIM.Gain Specify amplification factor. SIM.Delay Specify time constant in seconds.
Type 8792, 8793 Auxiliary functions Key / SELEC Action Description Select required simulation Selection x.SIM = simulation process. Selection p.SIM = simulation process valve. Activate the selection by checking the box unchecking the box . Press or deactivate it by Setting the parameters for simulation of the process and/or the process valve: / INPUT Select SIM.Gain (Amplification factor). Press The input screen for specifying the amplification factor is opened.
Type 8792, 8793 Auxiliary functions 26.2.22. DIAGNOSE – Menu for monitoring valves (option) The optional function DIAGNOSE can be used to monitor the state of the valve. If there are deviations from the set-point state, messages are output according to NE 107. Example of the output of a diagnosis message: Status signal 0.0 POS MENU CMD Figure 84: Symbol for: Diagnosis active POS MANU Example of a diagnosis message 26.2.22.1.
Type 8792, 8793 Auxiliary functions 26.2.22.3. DIAGNOSE – Operating structure Display all generated diagnosis messages DIAGNOSE ENTER D. MSG ENTER EXIT SERVICE.TIME Select a diagnosis message CLEAR ENTER Diagnosis message is displayed POS.MONITOR Delete message EXIT Assignment of status signals according to NE 107** Display the diagnosis functions* CONFIG. MSG ENTER EXIT SERVICE.TIME SELEC ENTER POS.MONITOR EXIT FAILURE Prio 1 FUNC.CHECK Prio 2 OUT SPEC.
Type 8792, 8793 Auxiliary functions 26.2.22.4. Activation of diagnosis functions In the ADD.DIAGNOSE menu several diagnosis functions are activated and incorporated into the DIAGNOSE main menu. Activatable diagnosis functions: HISTOGRAM Graphical display of the dwell time density and movement range. SERVICE.TIME Operating-hours counter TRAVEL.ACCU Path accumulator CYCLE.COUNTER TEMP.CHECK STROKE.CHECK PV.MONITOR POS.
Type 8792, 8793 Auxiliary functions 26.2.22.5. Description of the DIAGNOSE main menu D.MSG 1. – Diagnosis messages All generated diagnosis messages are listed in the D.MSG menu where they can be viewed and deleted. The status signal, which is assigned to the diagnosis message, is indicated by a symbol. Display example of a list with diagnosis messages Diagnosis message >> D.MSG << SERVICE.TIME TRAVEL.ACCU PV.
Type 8792, 8793 Auxiliary functions If several diagnosis messages are available with different status signals, the status signal with the highest priority is shown on the display. Overview of the status signals according to NE 107 (NE = NAMUR recommendation): Priority 1 2 3 4 Failure Function check Out of specification Maintenance required Status signal Description Table 77: CONFIG.
Type 8792, 8793 Auxiliary functions 3. ADD.DIAGNOSE – Activation and deactivation of diagnosis functions Diagnosis functions can be activated in this menu and incorporated into the DIAGNOSE main menu or already activated diagnosis functions can be deactivated again. Activation of diagnosis functions: For description see Chapter “26.2.22.4. Activation of diagnosis functions” Deactivation of diagnosis functions: The procedure is the same as for activation.
Type 8792, 8793 Auxiliary functions 26.2.22.6. Description of the diagnosis functions HISTOGRAM – Output of histograms The HISTOGRAM menu is divided into 2 parts: 1. Outputting the histograms for POS class (dwell time density) and DIR class (movement range) 2.
Type 8792, 8793 Auxiliary functions POS-Class - Description of the histogram of the dwell time density The histogram indicates how long the actuator has stopped in a specific position. For this purpose the stroke range is divided into 10 classes. The current position of one of the 10 classes is assigned to each scan time.
Type 8792, 8793 Auxiliary functions DIR-Class - Description of the histogram of the movement range The histogram indicates the movement ranges of the actuator between two direction reversal points. For this purpose the movement range between two changes in direction is divided into 10 classes. The current position of one of the 10 classes is assigned to each scan time.
Type 8792, 8793 Auxiliary functions Starting, stopping and deleting the histograms Key / ENTER Action Description Select HISTOGRAM (To do this, the HISTOGRAM function must be incorporated into the DIAGNOSE main menu. See Chapter “26.2.22.4. Activation of diagnosis functions”). Press The empty matrix of the POS-Class submenu (dwell time density) is displayed. Starting histograms: START * / Hold down as long as countdown (5 ...) is running Both histograms (POS class and DIR class) are started.
Type 8792, 8793 Auxiliary functions SERVICE.TIME – Operating-hours counter The operating-hours counter records the time during which the device was switched on. If the duty cycle reaches the specified time limit, a message is generated. • To do this, a history entry is made in the HISTORY submenu. For description see “26.2.22.7. History entries in the HISTORY submenu”. • The status signal, which is assigned to the message, is indicated at short intervals on the display. See also D.MSG and CONFIG.
Type 8792, 8793 Auxiliary functions TRAVEL.ACCU – Path accumulator The path accumulator records and adds up the path which the actuator piston covers. A movement of the actuator piston is detected when the position changes by at least 1 %. The interval for outputting messages is specified by inputting a limit for the total number of piston movements. • To do this, a history entry is made in the HISTORY submenu. For description see “26.2.22.7. History entries in the HISTORY submenu”.
Type 8792, 8793 Auxiliary functions Specifying interval for the output of messages Key / ENTER Action Description Select TRAVEL.ACCU (To do this, the TRAVEL.ACCU function must be incorporated into the DIAGNOSE main menu. See Chapter “26.2.22.4. Activation of diagnosis functions”). Press The menu is displayed. * Required for analog position sensor only (setting the STROKE submenu) / * Select STROKE * Press INPUT The preset value is displayed. * / Set total stroke of the actuator piston.
Type 8792, 8793 Auxiliary functions Operating structure: CYCLE.COUNTER ENTER EXIT Figure 95: LIMIT INPUT Input change in direction OK ESC NEXT M. Display the remaining changes in direction until the next message HISTORY ENTER History entry is displayed CLEAR Delete history entry EXIT Operating structure CYCLE.COUNTER Specifying interval for the output of messages Key / ENTER / INPUT Action Description Select CYCLE.COUNTER (To do this, the CYCLE.
Type 8792, 8793 Auxiliary functions Display TEMP.CHECK TEMP.CHECK 21.7 *C CURRENT MAX 21.7 *C MIN 21.7 *C LIMIT 29-8-1 EXIT CURRENT indicates the current temperature. MAX indicates the highest temperature of the slave pointer MIN indicates the lowest temperature of the slave pointer The permitted temperature range can be changed in the LIMIT submenu. A message is output if the temperature goes outside the permitted range. The temperature range has been preset at the factory from 0 ... 60 °C.
Type 8792, 8793 Auxiliary functions Key Action / Description Input upper temperature limit TEMP.MAX. Increase value < OK hanging the decimal C place Acknowledge value. Press Select TEMP.MIN / INPUT Open factory setting for lower temperature limit. Press / Input lower temperature limit TEMP.MIN. Increase value < hanging the decimal C place OK Press Acknowledge value. EXIT Press Return to the TEMP.CHECK menu. EXIT Press Return to the DIAGNOSE main menu. Table 89: TEMP.
Type 8792, 8793 Auxiliary functions CAUTION! If a stroke limit was set in the X.LIMIT menu, the mechanical end position monitor has only limited relevance. The end positions indicated on the process level under POS are not the physically caused end positions in this case. Therefore they cannot be compared with the end positions indicated in the STROKE.CHECK menu under MIN and MAX. Operating structure: Maximum position of the slave pointer STROKE.
Type 8792, 8793 Auxiliary functions Key Action Description OK Press Acknowledge value. EXIT Press Return to the STROKE.CHECK menu. EXIT Press Return to the DIAGNOSE main menu. Table 91: STROKE.CHECK; end position monitor. POS.MONITOR –Position monitoring The POS.MONITOR function monitors the current position of the actuator. The tolerance band for the set-point value is specified in the DEADBAND submenu.
Type 8792, 8793 Auxiliary functions Operating structure: POS.MONITOR ENTER DEADBAND COMP.TIME EXIT Figure 99: HISTORY INPUT INPUT ENTER Input tolerance band Input compensation time History entry is displayed OK ESC OK ESC CLEAR Delete history entry EXIT Operating structure POS.MONITOR Inputting tolerance band and compensation time Key Action Description Select POS.MONITOR (To do this, the POS.MONITOR function must be incorporated into the DIAGNOSE main menu. See Chapter “26.2.22.4.
Type 8792, 8793 Auxiliary functions 26.2.22.7. History entries in the HISTORY submenu Each diagnosis function, which can output a message, has the HISTORY submenu. When the diagnosis message is actuated, a history entry is created with date and value. The history entries of the respective diagnosis function can be viewed and deleted in the HISTORY submenu. A maximum of three history entries are stored from each diagnosis message.
Type 8792, 8793 Auxiliary functions Manual configuration of X.TUNE 26.3. This function is needed for special requirements only.. For standard applications the X.TUNE function has been preset at the factory. See chapter “23.2. X.TUNE – Automatic adjustment of the position controller”. For special requirements the X.TUNE function, as described below, can be manually configured. Opening the menu for the manual configuration of X.TUNE Key Action MENU Description Press for approx.
Type 8792, 8793 Auxiliary functions 26.3.1. Description of the menu for the manual configuration of X.TUNE X.TUNE.CONFIG Configuration of the X.TUNE function Specify which functions are to be executed when X.TUNE is running (automatic self-optimization). M.TUNE.POS Position of the end positions - Specify whether the pneumatic actuator has mechanical end positions. - Manual specification of the end positions If there are no mechanical end positions available, these are not approached by the X.
Type 8792, 8793 Auxiliary functions 26.3.1.2. X.TUNE.POS – Setting of the end positions In this menu you can specify whether the pneumatic actuator has mechanical end positions or not. If there are no mechanical end positions available, these are not approached by the X.TUNE and must be manually specified. Position of the end positions Key / ENTER Action Description Select M.TUNE.POS The selection for ACT.limit = mechanical end positions available ACT.
Type 8792, 8793 Auxiliary functions 26.3.1.3. M.TUNE.PWM – Optimization of the PWM signals In this menu the PWM signals for control of the aeration valves and bleed valves are manually optimized. For optimization the actuator is aerated and bled. A progress bar on the display indicates the position of the actuator and the speed of aeration and deaeration. The setting is optimum when the progress bar moves as slowly as possible. WARNING! Danger due to uncontrolled valve movement when the M.TUNE.
Type 8792, 8793 Auxiliary functions M.TUNE.AIR – Determination of the opening and closing times 26.3.1.4. By running this function, the opening and closing times of the valve are determined continuously. A change to the supply pressure will affect the aeration time which can be optimized in this way. For the setting the effects, which a change to the supply pressure has on the aeration time, can be continuously monitored via the M.TUNE.AIR function.
Type 8792, 8793 Operating structure / Factory settings Contents 27. OPERATING STRUCTURE AND FACTORY SETTINGS...............................................................................................
Type 8792, 8793 Operating structure / Factory settings 27. OPERATING STRUCTURE AND FACTORY SETTINGS The factory presets are highlighted in blue to the right of the menu in the operating structure. Examples: / Menu options activated or selected at the factory / Menu options not activated or selected at the factory 2 %, 10 sec, ... INPUT Values set at the factory 4- 20 mA 0- 20 mA 0- 10 V 0- 5 V BUS.
Type 8792, 8793 Operating structure / Factory settings BUS PDO 5) CMD 2) / Setpoint 1) Operation mode Error reset P.CONTRL active 1) Automatic X.TUNE X.TUNE X.TUNE STARTED TUNE #0 INIT ... X.TUNE ready Manual X.TUNE X.TUNE.CONFIG X.TUNE.DBDx X.TUNE.PARAx X.TUNE.LEAKAGE X.TUNE.Ypwm X.TUNE.Yfric X.TUNE.POS ACT.limit ACT.nolimit POS.pMIN POS.pMAX X.TUNE.PWM yB.min TUNE.yB yE.min TUNE.yE X.TUNE.AIR time.open time.close P.Q‘LIN 1) Q.LIN#0 CMD=0% Q.LIN#1 CMD=10% ... Q.LIN ready P.
Type 8792, 8793 Operating structure / Factory settings ADD.FUNCTION CHARACT CUTOFF DIR.CMD DIR.ACT SPLTRNG 2) X.LIMIT X.TIME X.CONTROL P.CONTROL 1) SECURITY SAFEPOS SIG.ERROR 6) BINARY.IN OUTPUT 7) CAL.USER SET.FACTORY SER.I/O EXTRAS POS.SENSOR 8) SERVICE SIMULATION DIAGNOSE Activatable auxiliary functions CHARACT Figure 103: 176 1) 2) 6) 7) 8) Operating structure - 3 only process controller Type 8793 only for position controller mode only for signal type 4-20 mA and Pt 100 Optional.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions CHARACT linear GP 1:25 GP 1:3 3 GP 1:5 0 GP 25:1 GP 3 3:1 GP 5 0:1 Graph FREE GRAPH y 0 –> 0% y 5 –> 5% •. •. • y 100 –> 100 % CUTOFF Min 0% Max 100 % 0% 100 % Type PCO CUT-type 1) Type XCO DIR.CMD Rise Fall DIR.ACT Rise Fall SPLTRNG 2) Min 0% Max 100 % 0% 100 % X.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions X.LIMIT X.TIME Min 0% Max 100 % T . open 1.0 sec 0% 100 % 1.0 sec T . close 1.0 sec 1.0 sec X.CONTROL P.CONTROL 1) DBND 1.0 % 1.0 % KXopn 1 1 KXcls 1 1 KDopn 0 0 KDcls 0 0 YBfric 0 0 YEfric 0 0 PID.PARAMETER DBND 1.0 % 1.0 % KP 1.00 1.00 TN 999.9 TV 0.0 0.0 sec 0% 0% X0 FILTER SETUP 0 PV-INPUT 999.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions PV-SCALE PVmin 0.0 PVmax 100.0 0.0 l/s 100.0 l/s VALUE K-Factor 9) 1.0 TEACH-IN Valve closing TEACH-IN Teach-in at work –> filling SP-INPUT VOLUME intern extern SP-SCALE 10) SPmin 0.0 SPmax 100.0 P.CO-INIT 0.0 l/s 100.0 l/s bumpless standard zeroinit SECURITY Access Code CODE 0000 MAIN MANU / AUTO ADDFUNCT X.TUNE P.Q‘LIN 1) P.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions SAFEPOS Safepos SIG.ERROR 6) SP/CMD Input 0% Error off Error on SAFEPOS SafePos off SafePos on PV Input 1) Error off Error on SAFEPOS SafePos off SafePos on BINARY.IN SafePos Manu / Auto X.TUNE X.CO / P.CO 1) BIN.IN type normally open normally closed OUTPUT 7) OUT ANALOG POS CMD PV 1) SP 1) OUT.type 4 - 20 mA 0 - 20 mA 0 - 10 V 0-5V CAL.
Type 8792, 8793 Operating structure / Factory settings OUT BIN 1 POS.Dev POS.Lim-1 Deviation 1.0 % 1,0 % Limit 0.0 % 0% Safepos ERR.SP/CMD 11) ERR.PV 12) Remote Tune.Status DIAG.State-1 FAILURE OUT SPEZ FUNC.CHECK MAINTENANCE OUT.type normally open normally closed OUT BIN 2 POS.Dev POS.Lim-2 Deviation 1.0 % 1,0 % Limit 100.0 % 100 % Safepos ERR.SP/CMD 11) ERR.PV 12) Remote Tune.Status DIAG.State-2 FAILURE OUT SPEZ FUNC.CHECK MAINTENANCE OUT.type normally closed CAL.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions CAL.USER calibr. POS calibr. INP 2) POS.pMIN x* POS.pMAX x* INP 4mA 0 13) x** INP 20mA 0 13) x** calibr. SP 10) calibr. PV 1) copy FACT->USER SET.FACTORY factory reset SER.I /O I /O.MODE 0 13) x** SP 20mA 0 13) x** PV 4mA 0 14) x** PV 20mA 0 14) x** SET VALUE 15) PT100: x** SP 4mA * Value is set for X.TUNE (automatic or manual).
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions SERIAL.CONFIG NONE par.,1 Stop EVEN par.,1 Stop ODD par.,1 Stop NONE par., 2 Stop EVEN par., 2 Stop ODD par., 2 Stop EXTRAS DISP.ITEMS POS CMD CMD /POS CMD /POS (t ) PV 1) SP 1) SP /PV 1) SP /PV (t ) 1) CLOCK INPUT 16) TEMP X.TUNE P.TUNE 1) P.LIN 1) SERVICE START-UP.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions START-UP.ITEMS POS CMD CMD /POS CMD /POS (t ) PV 1) SP 1) SP /PV 1) SP /PV (t ) 1) CLOCK INPUT 16) TEMP X.TUNE P.TUNE 1) P.LIN 1) DISP.MODE normal invers POS.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions SIMULATION SIGNAL.sim SIGNAL.form Extern Sinus Square Triangle Mixed CONTROL.sim Offset 50.0 % Amplitude 80.0 % Periode 5.0 sec x.SIM p.SIM DIAGNOSE D.MSG 17) SIM.Gain 1.0 SIM.Delay 1.0 sec SERVICE.TIME TRAVEL.ACCU CYCLE.COUNTER TEMP.CHECK STROKE.CHECK PV.MONITOR 1) POS.MONITOR CONFIG.MSG 17) SERVICE.TIME FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE ADD.DIAGNOSE Figure 112: TRAVEL.
Type 8792, 8793 Operating structure / Factory settings TRAVEL.ACCU FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE CYCLE.COUNTER FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE TEMP.CHECK FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE STROKE.CHECK FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE PV.MONITOR 1) FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE POS.MONITOR FAILURE FUNC.CHECK OUT.SPEZ MAINTENANCE ADD.
Type 8792, 8793 Operating structure / Factory settings ADD.DIAGNOSE HISTOGRAM SERVICE.TIME TRAVEL.ACCU CYCLE.COUNTER TEMP.CHECK STROKE.CHECK PV.MONITOR 1) POS.MONITOR RESET.HISTORY Reset done Aktivierbare Diagnosefunktionen HISTOGRAM POS-Class DIR-Class SYSTEM-DATA SERVICE.TIME LIMIT 90d. 00h NEXT M. HISTORY TRAVEL.ACCU HUB 20.0 mm LIMIT 1000000 cm NEXT.M HISTORY CYCLE.COUNTER LIMIT 1000000 NEXT.M HISTORY TEMP.
Type 8792, 8793 Operating structure / Factory settings Activatable auxiliary functions TEMP.CHECK CURRENT MAX MIN LIMIT TEMP.MAX 60.0 °C TEMP.MIN 0.0 °C TEMP.MAX HISTORY TEMP.MIN STROKE.CHECK MAX MIN LIMIT ZERO.TOL 0,5 % MAX.TOL 0,5 % ZERO HISTORY MAX POS.MONITOR DEADBAND 2.0 % COMP.TIME 10.0 sec HISTORY PV.MONITOR 1) DEADBAND 2.0 % COMP.TIME 10.
Type 8792, 8793 PROFIBUS DP Contents 28. DESCRIPTION OF THE PROFIBUS DP............................................................................................................................... 190 28.1. Technical data..................................................................................................................................................................... 190 28.2. Interfaces.....................................................................................................
Type 8792, 8793 PROFIBUS DP 28. DESCRIPTION OF THE PROFIBUS DP 28.1. Technical data The protocol sequence complies with the standard DIN 19245 Part 3. GSD file BUER0C1E.gsd Bitmap files BUER0C1E.bmp PNO-ID 0C1E Hex Baud rate Max.
Type 8792, 8793 PROFIBUS DP 28.3. Changing the operating state There are two ways of switching between the MANUAL and AUTOMATIC operating states for the PROFIBUS DP: • Input via the keyboard on the device: On the process level using the key function MANU and AUTO . • The operating state is transferred to the device via the bus (under PDO MODE). In this case switching is no longer possible using the keyboard on the device. 28.4.
Type 8792, 8793 PROFIBUS DP 29.
Type 8792, 8793 PROFIBUS DP 29.1. Connection diagram Type 8792 X1 - M12, 8-pole circular connector 2 X4 - M8, 4-pole socket, optional (for remote model only) 1 8 7 3 4 6 2 5 4 X3 - M12, 5-pole circular connector * X2 - M12, 5-pole socket * 4 3 3 1 3 4 5 5 Functional earth FE 2 * (inversely coded, PROFIBUS DP) 1 1 Figure 117: Connection PROFIBUS DP, positioner Typ 8792 29.2.
Type 8792, 8793 PROFIBUS DP 29.3. X1 - M12, 8-pole circular connector Pin Configuration 1 not used 2 not used On the device side External circuit / Signal level Operating voltage 3 GND 3 4 +24 V 4 24 V DC ± 10% max. residual ripple 10% Input signals of the control centre (e.g. PLC) 0–5V 5 Binary input + 5 + 6 Binary input – 6 GND (identical with Pin 3) (log. 0) 10 – 30 V (log. 1) Output signals to the control centre (e.g.
Type 8792, 8793 PROFIBUS DP 29.5.
Type 8792, 8793 PROFIBUS DP 29.6.
Type 8792, 8793 PROFIBUS DP 30. START-UP PROFIBUS DP 30.1. Safety instructions WARNING! Risk of injury from improper operation! Improper operation may result in injuries as well as damage to the device and the area around it • Before start-up, ensure that the operating personnel are familiar with and completely understand the contents of the operating instructions. • Observe the safety instructions and intended use. • Only adequately trained personnel may start up the equipment/the device.
Type 8792, 8793 PROFIBUS DP BUS.COMM – Settings on Type 8792/8793 30.3. Set the following menu options in the BUS.COMM menu for start-up of the PROFIBUS DP: Address 0 BUS FAIL Enter a device address (value between 0 and 126) Activate or deactivate approach of the safety position Selection SafePos off – The actuator remains in the position which corresponds to the set-point value last transferred (default setting).
Type 8792, 8793 PROFIBUS DP BUS.COMM ENTER Address 0 INPUT Input device address. Adjustment range: 0 ... 126 Enter value * OK SELEC BUS FAIL ENTER SafePos off EXIT SafePos on Activating / deactivating approach of the safety position Setting of BUS PDI and BUS PDO is made via GSD file SELEC BUS PDI ENTER Position P.CONTROL CMD active Only for type 8793: Process value1) Process values which are transferred from Type 8792/8793 to control.
Type 8792, 8793 PROFIBUS DP 30.4. Configuration via the control (PROFIBUS DP Master) The configuration requires the following components: • Software suitable for the configuration. For example Step7 from Siemens A brief description of this can be found in the following chapter “30.5. Configuration with Siemens Step7”. • GSD file (download from the Bürkert homepage:) 30.4.1.
Type 8792, 8793 PROFIBUS DP Name Description Identifier PDI:MODE Operating state (operation mode) GSD file: PDI:MODE Operating state: 0: AUTO 1: MANUAL 2: XTUNE 9: P.QLIN 10: P.TUNE PDI:ERR 12: BUSSAFEPOS Identifier (HEX): 41, 00, 05 Error GSD file: PDI:ERR Indicates the number of the process value (output) which was not written. The value is retained until it is deleted with PDO:ERR.
Type 8792, 8793 PROFIBUS DP Name Description Identifier PDO:MODE Operating state (operation mode) Value range 0, 1 or 12: 0: AUTO / 1: HAND GSD file: PDO:MODE Identifier (HEX): 81, 00, 16 / 12: BUSSAFEPOS If the value is too small or too large, the last valid value is used and is indicated in ERR with HEX 16.
Type 8792, 8793 PROFIBUS DP 30.5. Configuration with Siemens Step7 30.5.1. Example 1 of a positioner (Type 8792): Transfer of set-point and actual value Figure 120: ScreenShot PROFIBUS →→Pull the slave Type 8792 / 8793 onto the bus line with drag-and-drop. Figure 121: ScreenShot positioner →→Pull the modules PDI:POS and PDO:CMD/SP into the slave Type 8792 / 8793 with drag-and-drop.
Type 8792, 8793 PROFIBUS DP 30.5.2. Example 2 of a process controller (Type 8793): Transfer of several process values Figure 122: ScreenShot PROFIBUS →→Pull the slave Type 8792 / 8793 onto the bus line with drag-and-drop. Figure 123: ScreenShot process controller →→Pull the modules into the slave Type 8792 / 8793 with drag-and-drop.
Type 8792, 8793 DeviceNet Contents 31. DESCRIPTION.................................................................................................................................................................................. 207 31.1. Explanation of term DeviceNet.................................................................................................................................. 207 31.2. Technical data.......................................................................................
Type 8792, 8793 DeviceNet 33.5. Configuration example 1............................................................................................................................................... 223 33.5.1. Installation of the EDS file............................................................................................................ 223 33.5.2. Address assignment...................................................................................................................... 223 33.5.
Type 8792, 8793 DeviceNet 31. DESCRIPTION 31.1. Explanation of term DeviceNet DeviceNet • The DeviceNet is a field bus system which is based on the CAN protocol (Controller Area Network). It enables actuators and sensors (slaves) to be networked with higher-level controllers (master). • The Type 8792/8793 in the DeviceNet is a slave device according to the Predefined Master/Slave Connection Set stipulated in the DeviceNet specification.
Type 8792, 8793 DeviceNet Drop line length (Drop Lines) Length of the drop lines Baud rate Maximum total length Drop lines in the network Maximum length 125 kbaud 156 m 6 m for all baud rates 250 kbaud 78 m 500 kbaud 39 m Table 110: DeviceNet; drop line length 31.3.
Type 8792, 8793 DeviceNet 31.5. Bus status display The bus status is indicated on the display on the device. Display Device status Explanation Troubleshooting (is displayed approx. every 3 seconds) BUS offline Offline Online, BUS no connection no connection to the master Device is not connected to the • Check whether the baud rate has been correctly set bus. network-wide. The network access procedure • Bus connection including (Duplicate MAC-ID-Test, plug assignment correct. duration approx.
Type 8792, 8793 DeviceNet 31.6. Differences between the field bus devices and devices without a field bus The following chapters of these operating instructions are not valid for Type 8792/8793 with DeviceNet. • Section “Installation” Chapter “14. Electrical connection Circular plug-in connector version (multi-pole version)” Chapter “15. Electrical connection - Terminal version for cable gland” • Section “Start-up” Chapter “23.1.
Type 8792, 8793 DeviceNet 32.
Type 8792, 8793 DeviceNet 32.1. Connection diagram Type 8792 X4 - M8, 4-pole socket, optional (for remote model only) X1 - M12, 8-pole circular connector 2 1 8 4 3 1 7 3 2 6 4 X3 - M12, 5-pole circular connector 3 4 5 5 Function earth FE 1 Figure 125: Connection Device-Net, positioner Type 8792 32.2.
Type 8792, 8793 DeviceNet 32.3. X1 - M12, 8-pole circular connector Pin Configuration 1 not used 2 not used On the device side External circuit / Signal level Operating voltage 3 GND 3 4 +24 V 4 24 V DC ± 10% max. residual ripple 10% Input signals of the control centre (e.g. PLC) 0–5V (log. 0) 5 Binary input + 5 + 6 Binary input – 6 GND (identical with Pin 3) 10 – 30 V (log. 1) Output signals to the control centre (e.g.
Type 8792, 8793 DeviceNet 32.5.
Type 8792, 8793 DeviceNet 32.6.
Type 8792, 8793 DeviceNet 32.7. Terminating circuit for DeviceNet systems When installing a DeviceNet system, ensure that the terminating circuit of the data lines is correct. The circuit prevents the occurrence of interference caused by signals reflected onto the data lines. The trunk line must be terminated at both ends with resistors of 120 Ω each and 1/4 W power loss (see “Figure 127: Network topology, DeviceNet”). 32.8.
Type 8792, 8793 DeviceNet 33. START-UP DEVICENET 33.1. Safety instructions WARNING! Risk of injury from improper operation! Improper operation may result in injuries as well as damage to the device and the area around it • Before start-up, ensure that the operating personnel are familiar with and completely understand the contents of the operating instructions. • Observe the safety instructions and intended use. • Only adequately trained personnel may start up the equipment/the device.
Type 8792, 8793 DeviceNet BUS.COMM – Settings on Type 8792/8793 33.3. Set the following menu options in the BUS.COMM menu for start-up of the DeviceNet version: Address 0 Enter a device address (value between 0 and 63) BAUD RATE Selection of the baud rate • The baud rate can be changed either by pressing the operator keys on the device or via the bus. • A change has no effect until a reset (send a reset message to the identity object) or power up is implemented.
Type 8792, 8793 DeviceNet Key Action Description Select baud rate / Select BAUD RATE Press The input screen is opened. Select baud rate 125 kBd / 250 kBd / 500 KBd SELEC Press The selection is now marked by a filled circle EXIT Press Return to BUS.COMM. ENTER / . Deactivating / activating safety position / ENTER / Select BUS FAIL The menu options for deactivating and activating the safety position are displayed.
Type 8792, 8793 DeviceNet 33.4. Configuration of the process data The following components are required for the configuration: • Software suitable for the configuration. For example RSNetWorx for DeviceNet (Rev. 4.12.00). • ESD file (is on the supplied CD) Implementation of the configuration process is described in the following chapters “33.5. Configuration example 1” and “33.6. Configuration example 2”. Transmitting process data.
Type 8792, 8793 DeviceNet The addresses indicated in “Table 119” can be used as a path data for the attribute Produced Connection Path of an I/O connection. The attributes described in more detail in the following “Table 120”can be transferred as input process data via this I/O connection. Nevertheless, by using this address data, the attributes combined in the assemblies can also be accessed acyclically via Explicit Messages.
Type 8792, 8793 DeviceNet 33.4.2. Static output assemblies Name Address of data attribute of the assemblies for read access. Class, Instance, Attribute INP (factory setting) 4, 21, 3 Format of the data attribute Byte 0: INP low Byte 1: INP high SP 4, 22, 3 Byte 0: SP low Byte 1: SP high Table 121: Static output assemblies; DeviceNet The addresses indicated in “Table 121” can be used as path data for the attribute Consumed Connection Path of an I/O connection.
Type 8792, 8793 DeviceNet 33.5. Configuration example 1 The example describes the principle procedure when configuring the device using the software RSNetWorx for DeviceNet (Rev. 4.12.00). 33.5.1. Installation of the EDS file The EDS file supplied on the CD is installed with the aid of the EDS Installation Wizard Tool associated with RSNetWorx. During the installation procedure the icon also supplied on CD can be assigned (if this does not occur automatically). 33.5.2.
Type 8792, 8793 DeviceNet 33.5.3. Offline parameterization of the Device When a device has been inserted into the DeviceNet configuration of RSNetWorx, the device can be parameterized offline. “Figure 130” indicates how, for example, an input assembly which deviates from the factory setting (input process data can be transferred via I/O connection) can be selected.
Type 8792, 8793 DeviceNet 33.5.4. Online parameterization of the Device Devices can also be parameterized online. In doing so, you can also select whether only individual parameters (single) or all parameters (all) of a group are read from the device (upload) or are loaded into the device (download). It is also possible to transfer individual parameters or all parameters of a group cyclically in monitor mode. This may be helpful particularly for start-up purposes.
Type 8792, 8793 DeviceNet 33.6. Configuration example 2 This example describes the principle procedure for setting up the process image of a DeviceNet master/scanner using the software RSNetWorx for DeviceNet (Rev. 4.12.00). Setting up the scan list and setting the I/O parameters →→First of all set up the scan list of the DeviceNet master/scanner. To do this, include the devices listed in the left part of the associated window in the scan list in the right part of the window.
Type 8792, 8793 DeviceNet 33.6.1. Setting up the process image (Mapping) The AUTOMAP function is used to assign the input data of the devices specified in the scan list to the process image of the DeviceNet master/scanner. In our example this is how the assignment indicated in “Figure 133” results. For example the input process values of the device with address 3 are assigned to the internal addresses of the scanner as follows: Actual position I:1.1 Nominal position I:1.2 Error I:1.
Type 8792, 8793 DeviceNet 228 english
Type 8792, 8793 Maintenance and Troubleshooting Contents 34. MAINTENANCE................................................................................................................................................................................ 230 35. ERROR MESSAGES AND MALFUNCTIONS..................................................................................................................... 230 35.1. Error messages on the display...............................................................
Type 8792, 8793 Maintenance and Troubleshooting 34. MAINTENANCE The Type 8792/8793 is maintenance-free when operated according to the instructions in this manual. 35. ERROR MESSAGES AND MALFUNCTIONS 35.1. Error messages on the display 35.1.1.
Type 8792, 8793 Maintenance and Troubleshooting 35.1.2. Error and warning messages while the X.TUNE function is running Display Causes of error TUNE err/break Manual termination of self-parameterization by pressing the EXIT key X.TUNE locked The X.TUNE function is blocked Input access code X.TUNE ERROR 1 No compressed air connected Connect compressed air X.TUNE ERROR 2 Compressed air failed during Autotune (X.TUNE). Check compressed air supply X.
Type 8792, 8793 Maintenance and Troubleshooting 35.1.3. Error messages while the P.Q’LIN function is running Display Cause of fault Remedial action Q.LIN err/break Manual termination of linearization by pressing the EXIT key. P.Q‘LIN ERROR 1 No supply pressure connected. Connect supply pressure. No change to process variable. Check process and, if required, switch on pump or open the shut-off valve. Check process sensor. P.Q‘LIN ERROR 2 Table 125: Failure of the supply pressure while P.
Type 8792, 8793 Maintenance and Troubleshooting 35.1.5. Error Messages on Field Bus Devices Display Causes of error Remedial action MFI fault Field bus board defective. Not possible, device defective. Table 127: Error Messages on Field Bus Devices On DeviceNet: Display Device status Explanation Troubleshooting (is displayed approx. every 3 seconds) BUS offline Offline Device is not connected to the bus. • Check whether the baud rate has been correctly set network-wide.
Type 8792, 8793 Maintenance and Troubleshooting 35.2. Other faults Problem Possible causes Remedial action POS = 0 (when CMD > 0%) or POS = 100%, (when CMD < 100%) Sealing function (CUTOFF) has been unintentionally activated Deactivate sealing function. Binary output: Check binary output connection. PV = 0 (when SP > 0) or PV = PV (when SP > SP ) Applies only to devices with binary output: Binary output does not switch.
Type 8792, 8793 Packaging, Storage, Disposal Contents 36. PACKAGING AND TRANSPORT............................................................................................................................................. 236 37. STORAGE............................................................................................................................................................................................ 236 38. DISPOSAL...............................................................
Type 8792, 8793 Packaging, Storage, Disposal 36. PACKAGING AND TRANSPORT NOTE! Transport damages! Inadequately protected equipment may be damaged during transport. • During transportation protect the device against wet and dirt in shock-resistant packaging. • Avoid exceeding or dropping below the allowable storage temperature. 37. STORAGE NOTE! Incorrect storage may damage the device. • Store the device in a dry and dust-free location! • Storage temperature. -20 – +65 °C. 38.
Type 8792, 8793 Additional technical information Contents 39. SELECTION CRITERIA FOR CONTINUOUS VALVES.................................................................................................. 238 40. PROPERTIES OF PID CONTROLLERS................................................................................................................................ 240 40.1. P-portion..........................................................................................................................
Type 8792, 8793 Additional technical information 39. SELECTION CRITERIA FOR CONTINUOUS VALVES The following criteria are crucial for optimum control behavior and to ensure that the required maximum flow is reached: • the correct selection of the flow coefficient which is defined primarily by the orifice of the valve; • close coordination between the nominal width of the valve and the pressure conditions in consideration of the remaining flow resistance in the equipment.
Type 8792, 8793 Additional technical information The kVS value of the continuous valve should have at least the value which is calculated according to equation (1) or (2) which is appropriate to the application, however it should never be far above the calculated value.
Type 8792, 8793 Additional technical information 40. PROPERTIES OF PID CONTROLLERS A PID controller has a proportional, an integral and a differential portion (P, I and D portion). 40.1. P-portion Function: T v = 0,42 ⋅ T u Kp is the proportional coefficient (proportional gain). It is the ratio of the adjusting range ∆Y to the proportional range ∆Xd.
Type 8792, 8793 Additional technical information 40.2. I-portion Function: Y= 1 Xddt Ti∫ (5) Ti is the integral action time or actuating time. It is the time which passes until the actuating variable has run through the whole adjustment range.
Type 8792, 8793 Additional technical information 40.3. D-portion Function: Y = K d⋅ dXd dt (6) Kd is the derivative action coefficient. The larger Kd is, the greater the D-effect is.
Type 8792, 8793 Additional technical information 40.4.
Type 8792, 8793 Additional technical information 40.5. Implemented PID controller 40.5.1. D Portion with delay In the process controller Type 8793 the D portion is implemented with a delay T. Function: T⋅ dY dXd + Y = K d⋅ dt dt (9) Superposition of P, I and DT Portions X Xd t Y Xd T t T Figure 138: Characteristic of superposition of P, I and DT Portions 40.5.2.
Type 8792, 8793 Additional technical information 41. ADJUSTMENT RULES FOR PID CONTROLLERS The control system Type 8793 features a self-optimization function for the structure and parameters of the integrated process controller. The determined PID parameters can be seen via the operating menu and re-optimized at will for an empirical path. The regulatory literature includes a series of adjustment rules which can be used in experimental ways to determine a favorable setting for the controller parameters.
Type 8792, 8793 Additional technical information The controller parameters can then be calculated from Kkrit and Tkrit according to the following table. Adjustment of the parameters according to Ziegler and Nichols Controller type Adjustment of the parameters P controller Kp = 0.5 Kkrit PI controller Kp = 0.45 Kkrit Tn = 0.85 Tkrit PID controller Kp = 0.6 Kkrit Tn = 0.5 Tkrit Table 131: - Tv = 0.
Type 8792, 8793 Additional technical information 41.2. Adjustment rules according to Chien, Hrones and Reswick (actuating variable jump method) With this method the controller parameters are adjusted on the basis of the transient behavior of the controlled system. An actuating variable jump of 100% is output. The times Tu and Tg are derived from the progress of the actual value of the control variable.
Type 8792, 8793 Additional technical information Adjustment of the parameters according to Chien, Hrones and Reswick Adjustment of the parameters Controller type for aperiodic control process for control process (0% overshoot) with 20% overshoot Reference Malfunction K p = 0,7 ⋅ PI controller K p = 1,2 ⋅ K p = 0,7 ⋅ Tg T u⋅K s K p = 0,7 ⋅ Tg T u⋅K s Tg Tg K p = 1,2 ⋅ T u⋅K s T u⋅K s K p = 1,2 ⋅ Tg T u⋅K s K p = 0,7 ⋅ Tg T u⋅K s T v = 0,42 ⋅ T u K p = 1,2 ⋅ PID controller Table 132: T
Type 8792, 8793 Tables for customer-specific settings Contents 42. TABLE FOR YOUR SETTINGS ON THE POSITIONER................................................................................................ 250 42.1. Settings of the freely programmable characteristic...................................................................................... 250 43. TABLE FOR YOUR SETTINGS ON THE PROCESS CONTROLLER TYPE 8793............................................. 251 43.1.
Type 8792, 8793 Tables for customer-specific settings 42. TABLE FOR YOUR SETTINGS ON THE POSITIONER 42.1.
Type 8792, 8793 Tables for customer-specific settings 43. TABLE FOR YOUR SETTINGS ON THE PROCESS CONTROLLER TYPE 8793 43.1.
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