User’s Manual Models UT351/UT321 Digital Indicating Controllers User’s Manual IM 05D01D12-41E IM 05D01D12-41E 6th Edition
i Introduction Thank you for purchasing the UT351/UT321 digital indicating controllers. ■ How to Use the Manuals Purpose Setup Title 1. Installation Description Describes the tasks (installation, wiring, and others) required to make the controller ready for operations. Describes examples of setting PV input types, control output types, and alarm types. Making settings described herein allows you to carry out basic control. Operating procedures 3.
ii ■ Safety Precautions The following symbol is indicated on the controller to ensure safe use. CAUTION This symbol on the controller indicates that the operator must refer to an explanation in the user’s manual in order to avoid the risk of injury or death of personnel or damage to the instrument. The manual describes how the operator should exercise special care to avoid electric shock or other dangers that may result in injury or loss of life.
iii ■ Regarding Protection, Safety, and Prohibition Against Unauthorized Modification (1) In order to protect the product and the system controlled by it against damage and ensure its safe use, make certain that all of the instructions and precautions relating to safety contained in this document are strictly adhered to. Yokogawa does not guarantee safety if products are not handled according to these instructions. (2) Modification of the product is strictly prohibited.
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Toc-i Model UT351/UT321 Digital Indicating Controllers User’s Manual IM 05D01D12-41E 6th Edition CONTENTS Introduction........................................................................................................... i 1. 2. 3. 4. Installation .............................................................................................. 1-1 1.1 Model and Suffix Codes .................................................................................. 1-1 1.2 How to Install .....
Toc-ii 5. 6. Parameters .............................................................................................. 5-1 5.1 Parameter Map ................................................................................................ 5-1 5.2 Lists of Parameters ......................................................................................... 5-4 Function Block Diagram and Descriptions............................................ 6-1 Revision Information ......................
1. <1. Installation> 1-1 Installation This chapter describes installation, wiring, and other tasks required to make the controller ready for operation. 1.1 Model and Suffix Codes Before using the controller, check that the model and suffix codes match your order.
1.2 1-2 <1. Installation> How to Install NOTE To install the controller, select a location where: 1. no one may accidentally touch the terminals, 2. mechanical vibrations are minimal, 3. corrosive gas is minimal, 4. temperature can be maintained at about 23 C and the fluctuation is minimal, 5. no direct radiant heat is present, 6. no magnetic disturbances are caused, 7. no wind blows against the terminal board (reference junction compensation element), 8. no water is splashed, 9.
<1. Installation> 1-3 ■ External Dimensions and Panel Cutout Dimensions UT351 Unit: mm Large bracket 96 91.8 100 112 11 96 Small bracket 1 to 10 mm (Panel thickness) General installation Side-by-side close installation [(N-1) 96+92] +0.8 0 92 +0.8 0 117 min. (53) 92 145 min. "N" stands for the number of controllers to be installed. However, the measured value applies if N 5. +0.8 0 92 +0.8 0 (25) UT321 Unit: mm Small bracket 112 100 91.
<1. Installation> 1-4 ■ How to Install Turn off the power to the controller before installing it on the panel because there is a possibility of electric shock. CAUTION After opening the mountingzhole on the panel, follow the procedures below to install the controller: 1. Insert the controller into the opening from the front of the panel so that the terminal board on the rear is at the far side. 2.
1.3 1-5 <1. Installation> How to Connect Wires CAUTION 1) Before carrying out wiring, turn off the power to the controller and check that the cables to be connected are not alive with a tester or the like because there is a possibility of electric shock. 2) For the protection and safe use of the controller, be sure to place a circuit breaker (conforms with IEC60947, 5A, 100V or 220V AC) near the controller where the breaker can easily be operated.
<1. Installation> 1-6 ● Cable Specifications and Recommended Cables Purpose Name and Manufacturer Power supply, grounding, relay contact outputs 600 V PVC insulated wires, JIS C 3307, 0.9 to 2.0 mm2 Thermocouple Shielded compensating lead wires, JIS C 1610, (See Yokogawa Electric's GS 6B1U1-E.) X- - RTD Shielded wires (three conductors), UL2482 (Hitachi Cable) Other signals Shielded wires - ● Recommended Terminal Lugs Applicable wire size 2 0.3 to 1.65 mm Tightening torque 0.
1.4 <1. Installation> 1-7 Hardware Specifications PV Input Signals • Number of inputs: 1 (terminals 11 - 12 - 13 ) • Input type: Universal input system. The input type can be selected with the software. • Sampling period: 250 ms • Burnout detection: Functions at TC, RTD, standard signal (0.4 to 2 V or 1 to 5 V) Upscale, downscale, and off can be specified. For standard signal, burnout is determined to have occurred if it is 0.1 V or less. • Input bias current: 0.
1-8 <1. Installation> Retransmission Output Either PV, target setpoint, or control output is output. Either the retransmission output or the 15 VDC loop power supply can be used with terminals 14 - 15 . • Number of outputs: 1 (terminals 14 - 15 ) • Output signal: 4-20 mA DC • Load resistance: 600 or less • Output accuracy: 0.
<1. Installation> 1-9 Contact Inputs • Purpose: Selection between target setpoints or Auto/Man modes, or for other purposes • Number of inputs: 2 • Input type: Non-voltage contact or transistor open collector input • Input contact rating: 12 V DC, 10 mA or more • On/off determination: For non-voltage contact input, contact resistance of 1 k or less is determined as “on” and contact resistance of 20 k or more as “off.
1-10 <1. Installation> Safety and EMC Standards • Safety: Complies with IEC/EN61010-1 (CE), approved by C22.2 No.61010-1, approved by UL508. Installation category : CAT. II Pollution degree : 2 (IEC/EN61010-1, C22.2 No.610101) Measurement category : I (CAT. I : IEC/EN61010-1) Rated measurement input voltage : 10V DC max.(across terminals), 300V AC max.
<1. Installation> 1-11 • Panel cutout dimensions: UT351 920+0.8 (W) 920+0.8 (H) mm UT321 450+0.6 (W) 920+0.8 (H) mm • Installation position: Up to 30 upward facing (not designed for facing downward) • Wiring: M3.5 screw terminals (for signal wiring and power/ground wiring as well) Power Supply Specifications • Power supply: Rated voltage of 100 to 240 V AC ( 10%), 50/60 Hz • Power consumption: Max. 20 VA (8.0 W max.) • Internal fuse rating: 250 V AC, 1.
<1. Installation> 1-12 • Relay contact alarm output terminals: Not isolated between relay contact alarm outputs. Isolated from other input/output terminals and internal circuit. • RS-485 communication terminals: Not isolated from contact input terminals. Isolated from other input/output terminals and internal circuit. • Power terminals: Isolated from other input/output terminals and internal circuit. • Grounding terminals: Isolated from other input/output terminals and internal circuit.
1.5 <1. Installation> 1-13 Terminal Wiring Diagrams NOTE Do not use unassigned terminals as relay terminals. Terminal wiring diagrams are shown on and after the next page. IM 05D01D12-41E 6th Edition: Mar.
Control output Relay contact output NC 1 NO 2 COM 3 ■ UT351 Standard Type (Model UT351-0 or UT351-3 ) Note: Select this option from * Wiring can only be carried the OT parameter. RS-485 communication * Wiring can only be carried out out for controllers with * Time proportional PID for controllers with 24 V DC loop power supply. relay contact output is communication functions. 24 V DC loop configured at factory 23 SDB(+) Maximum baud rate: 9600 bps power supply before shipment.
■ UT351 Heating/Cooling Type (Model UT351-2 ) Heating-side control output Relay contact output NC 1 NO 2 COM 3 RS-485 communication * Wiring can only be carried out for controllers with communication functions. Maximum baud rate: 9600 bps 23 SDB(+) * Time proportional PID relay contact output is configured at factory before shipment. * Available if 4, 7 or 10 is set in the OT (Control Output Type) setup parameter.
■ UT321 Standard Type (Model UT321-0 or UT321-3 ) PV input * Not configured at factory before shipment See “2. Initial Settings,” for more information. Control output Relay contact output NC 1 NO 2 COM 3 Note: Select this option from * Wiring can only be carried the OT parameter. out for controllers with * Time proportional PID 24 V DC loop power supply.
Heating-side control output Relay contact output * Time proportional PID relay contact output is configured at factory NC 1 before shipment. * Available if 4, 7 or 10 is set in the OT NO 2 (Control Output Type) setup parameter. Receiving 4-20 mA DC Current Signals with the Controller PV input * Not configured at factory before shipment See “2. Initial Settings,” for more information. RS-485 communication * Wiring can only be carried out for controllers with communication functions.
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2. <2. Initial Settings> 2-1 Initial Settings This chapter describes examples of setting PV input types, control output types, and alarm types. Carrying out settings described herein allows you to perform basic control. Refer to examples of various settings to understand how to set parameters required. Refer to “5.1 Parameter Map” for an easy to understand explanation of setting various parameters.
2.1 2-2 <2. Initial Settings> Names and Functions of Front Panel Parts UT351 UT321 1. Process variable (PV) display 2. Setpoint display 3. Target setpoint (SP) number indicator lamps 5. Alarm indicator lamps 4. Status indicator lamp 6. Light-loader interface 9. 7. A/M key and keys 1. Process variable (PV) display 4. Status indicator lamp 2. Setpoint display 3. Target setpoint (SP) number indicator lamps 6. Light-loader interface 5. Alarm indicator lamps 8. SET/ENT key 7. A/M key 9.
2.2 2-3 <2. Initial Settings> Setting PV Input Type (Setting First at Power-on) NOTE • The controller displays the operating display when the power is turned on. However, if PV input type has not been set, “IN” appears. In this case, first use the key to display the input range code to use, then press the key to register it. Then, set the maximum value (RH) and minimum value (RL) of the PV input range (for voltage input, set the maximum value (SH) and minimum value (SL) of the PV input scale).
3. 2-4 <2. Initial Settings> Press the key once to register the required setpoint. SET/ENT 8. Press the key once to display the parameter “RL” (minimum value of PV input range). SET/ENT Displays parameter “RL”. PV SP 2 3 4 PV SP AL1 2 MAN 3 SP 2 3 4 SP A/M AL1 2 MAN 3 SET/ENT A/M SET/ENT 4. Press the key once to display the parameter “UNIT” (PV Input Unit). SET/ENT 9. Displays parameter “UNIT”. PV SP 2 3 Press the or key to display the required setpoint.
<2. Initial Settings> 2-5 ■ Instrument Input Range Codes Select the unit from the UNIT parameter. Input Type Instrument Input Range Code OFF Unspecified 1 K 2 3 J 4 5 T 6 B 7 S 8 R 9 N 10 E 11 L(DIN) 12 Thermocouple 13 U(DIN) 14 W 15 Platinel 2 16 PR20-40 17 W97Re3W75Re25 18 30 JPt100 31 RTD 35 Pt100 36 37 Standard signal DC voltage 0.
2.3 2-6 <2. Initial Settings> Changing PV Input Type The following operating procedure describes an example of changing the K-type thermocouple (-199.9 C to 500.0 C) to a Pt100 resistance temerature detector (-199.9 C to 500.0 C) and setting the measurement range of 0.0 C to 200.0 C. PV input terminal Thermocouple/mV/V input.............................. RTD input .................................................. 1.
9. Press the setpoint. 2-7 <2. Initial Settings> SET/ENT key once to register the 14. Press the key once to display the parameter “RL” (minimum value of PV input range). SET/ENT Displays parameter “RL”. PV SP 2 3 4 PV SP AL1 2 MAN 3 SP 2 3 4 SP A/M AL1 2 MAN 3 SET/ENT A/M SET/ENT 10. Press the key once to display the parameter “UNIT” (PV input unit). SET/ENT 15. Displays parameter “UNIT”. PV SP 2 3 Press the or key to display the required setpoint.
2.4 2-8 <2. Initial Settings> Setting Control Output Type The following operating procedure describes an example of changing time proportional PID relay output (0: factory-set default) to current output (2). Control output terminal Values in parentheses are setpoints Time proportional PID relay (0)/on-off(3) output........................... 1 - 2 Current (2)/time proportional PID voltage pulse (1) output............. 16 - 17 3 For details on the heating/cooling control output terminals, see “1.
9. 2-9 <2. Initial Settings> Press the setpoint. SET/ENT key once to register the 10. Press the key for more than 3 seconds. This returns you to the display shown at power-on (figure below). SET/ENT PV SP 2 3 Displays PV. 4 PV SP AL1 2 MAN 3 SP 2 3 4 SP A/M AL1 2 Displays target setpoint. MAN 3 SET/ENT A/M SET/ENT 2.
5. <2. Initial Settings> Press the key once to display the menu “FUNC”. SET/ENT 8. Displays menu “FUNC”. PV SP 2 3 2-10 Press the key once to register the setpoint. You can take the same steps for alarm-2 type (AL2), and alarm-3 type (AL3) that are displayed after this. SET/ENT 4 SP AL1 2 MAN 3 PV A/M SP 2 3 4 SET/ENT SP AL1 2 MAN 3 A/M SET/ENT 6. Press the key several times to display the parameter “AL1” (alarm-1 type). SET/ENT Displays parameter “AL1”. PV SP 2 3 9.
2-11 <2. Initial Settings> ■ List of Alarm Types The table below shows the alarm types and alarm actions. In the table, codes 1 to 10, 33 to 38 are not provided with stand-by actions, while codes 11 to 20, 43 to 48 are provided with stand-by actions.
2-12 <2. Initial Settings> Note 1: The fault diagnosis output turns on in case of input burnout, A/D converter failure, or reference junction compensation (RJC) failure. The control output in case of input burnout or A/D converter failure is set to the value of the PO (Preset Output Value) setup parameter. In case of RJC failure, the controller continues control under the condition of “RJC = OFF”. Note 2: The FAIL output is on during normal operation and turns off in case of failure.
2.6 <2. Initial Settings> 2-13 Setting the PV Display Color Changing Function “Active Color PV Display” The following operating procedure describes an example of changing the PV color mode (factory-set default : Fixed in red mode) to Link to alarm 1 mode. (1) Bring the operating display into view (appears at power on). key several times to display the menu “PCMD” (PV color mode). SET/ENT Displays PV.
2.7 2-14 <2. Initial Settings> Setting the High Limit and Low limit for PV Color Change The following operating procedure describes an example of changing the PV display color by PV limit(s). Set the High limit and / or Low limit for PV color change. (1) Bring the operating display into view (appears at power-on). key or required setpoint. Displays PV. PV SP 2 3 AL1 2 MAN 3 PV SP 2 AL1 A/M SET/ENT SET/ENT key for more than 3 seconds to call up the menu “OP.PA.
3. <3. Operations> 3-1 Operations This chapter describes key entries for operating the controller. For operations using external contact inputs, see “1.5 Terminal Wiring Diagrams.” If you cannot remember how to carry out an operation during setting, press the key for more than 3 seconds. This brings you to the display (operating display) that appears at poweron. SET/ENT NOTE Do not use the instrument generating strong magnetic field such as radio equipment and the like near the controller.
<3. Operations> 3-2 ■ Operating Displays for a Heating/Cooling Controller ● SP Display The PV input value appears on the PV display. The target setpoint (1.SP) appears on the Setpoint display. ● Heating/Cooling OUT Display The PV input value appears on the PV display. The heating (H) and cooling (C) sides control output values appears on the Setpoint display.
3.2 <3. Operations> 3-3 Setting Target Setpoint (SP) The following operating procedure describes an example of setting 120.0 to a target setpoint. In automatic operation, the controller starts control using set target setpoints. NOTE When the target setpoint is set through communication, the target setpoint cannot be changed by keystroke. 1. Bring the operating display into view (display appears at power on). Displays PV. PV 3. Press the setpoint.
3.3 3-4 <3. Operations> Performing/Canceling Auto-tuning Auto-tuning should be carried out after setting a target setpoint (SP). Make sure the controller is in automatic operation mode (AUTO) and running state (RUN) before carrying out auto-tuning. See “ 3.8 Switching between AUTO and MAN,” to change to AUTO and “ 3.7 Switching between Run and Stop,” to change to Run. NOTE When on-off control is being used, auto-tuning cannot be carried out.
5. 3-5 <3. Operations> Press the key once to register the setpoint. (This starts auto-tuning.) If the key is pressed when AT = OFF, auto-tuning will be cancelled. In this case, PID contains the value existing before auto-tuning. SET/ENT 6. During auto-tuning, the panel indications become as shown below. SET/ENT PV SP 2 3 4 SP AL1 2 MAN 3 MAN lamp blinks. A/M PV SET/ENT SP 2 3 4 SP AL1 2 MAN 3 Auto-tuning is complete when the MAN lamp goes off. A/M SET/ENT 3.
7. <3. Operations> Press the or required setpoint. [TIP] The PID parameter numbers set in step 4 should be set as follows: In case of PID for 1.SP, PID = 1Gr In case of PID for 2.SP, PID = 2Gr In case of PID for 3.SP, PID = 3Gr In case of PID for 4.SP, PID = 4Gr key to display the PV SP 2 3 4 SP AL1 2 MAN 3 Blinks during change. A/M SET/ENT 8. Press the setpoint. SET/ENT 3-6 9. Press the key for more than 3 seconds. This returns you to the display shown at power-on (figure below).
3. 3-7 <3. Operations> Press the key twice to display the parameter “A1”. SET/ENT 5. Displays parameter “A1”. PV SP 2 3 Press the setpoint. key once to register the SET/ENT PV SP 2 4 SP SP AL1 AL1 3 4 2 2 MAN 3 MAN 3 A/M A/M SET/ENT SET/ENT 4. Press the or required setpoint. Also configure the Alarm-2 Setpoint (A2) and Alarm-3 Setpoint (A3) parameters that follow this step. key to display the 6. PV SP 2 3 4 SP AL1 2 MAN 3 Blinks during change.
3. 3-8 <3. Operations> Press the key several times to display the parameter “SP.NO”. SET/ENT 5. Displays parameter “SP.NO”. PV SP 2 3 Press the setpoint. key once to register the SET/ENT PV SP 2 4 SP SP AL1 AL1 3 4 2 2 MAN 3 MAN 3 A/M A/M SET/ENT SET/ENT 4. Press the or required setpoint. key to display the PV SP 2 3 Blinks during change. 4 SP AL1 2 6. Press the key for more than 3 seconds. This returns you to the display shown at power-on (figure below).
3.8 <3. Operations> 3-9 Switching between AUTO and MAN NOTE If AUTO and MAN have been switched using contact input, when the contact input is ON, switching between AUTO and MAN cannot be achieved by keystroke. 1. Bring the operating display into view (display appears at power on). Displays PV. PV SP 2 3 SP AL1 2 3 MAN 4 Displays target setpoint. A/M SET/ENT 2. Each time you press the alternately.
3.9 3-10 <3. Operations> Manipulating Control Output in Manual Operation NOTE Control output cannot be changed if the controller is stopped. In this case, the preset output value (setup parameter PO) will be output. A control output value is linked with a display value changed using the that the control output changes as displayed without requiring the or key. SET/ENT 1. Bring manual operating display into view. For switching to manual operation, see “3.8 Switching between AUTO and MAN.
<3. Operations> 3-11 ● Controller Behavior and Control Output Manipulation when the Dead Band is Positive The following is an example when the DB parameter is set at 12.4%. key with the heating-side output under manipulation (i.e., coolingIf you hold down the side output C = 0.0%), the heating-side output (H =) decreases. Consequently, both the heating-side and cooling-side outputs change to 0.0%.
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4-1 <4. Troubleshooting and Maintenance> 4. Troubleshooting and Maintenance 4.1 Troubleshooting ■ Troubleshooting Flow If the operating display does not appear after turning on the controller’s power, follow the measures in the procedure below. If a problem appears complicated, contact our sales representative. Is the instrument defective? Yes No Totally inoperable? Is key operation faulty? Yes Yes Check wiring on the power supply terminals. Check the key lock setting.
4-2 <4. Troubleshooting and Maintenance> ■ Errors at Power on The following table shows errors that may be detected by the fault diagnosis function when the power is turned on. Error indication (on PV display unit) Description of error PV (E000) Faulty RAM (E001) Faulty ROM (E002) System data error 0% PV decimal point blinks.
<4. Troubleshooting and Maintenance> 4-3 ■ If a Power Failure Occurs during Operation ● Momentary Power Failures shorter than 20 ms The controller is not affected at all and continues normal operation. ● Power Failures of 20 ms or longer • The alarm function of the controller continues to work normally. (Alarms with the stand-by feature temporarily return to their stand-by state, however.) • Setting parameters that have already been configured retain their settings. • Auto-tuning is cancelled.
4-4 <4. Troubleshooting and Maintenance> ■ Troubleshooting when the Controller Fails to Operate Correctly If your control tasks are not successful, check the preset parameters and controller wiring before concluding the controller to be defective. The following show some examples of troubleshooting you should refer to in order to avoid the possibility of other problems. ● The Controller does not Show the measured input (PV). • The UT351/UT321 controllers have a universal input.
4.2 <4. Troubleshooting and Maintenance> 4-5 Maintenance This section describes the cleaning and maintenance of the UT351/UT321. 4.2.1 Cleaning The front panel and operation keys should be gently wiped with a dry cloth. NOTE Do not use alcohol, benzine, or any other solvents. 4.2.2 Replacing Brackets When the brackets are broken or lost, purchase the following brackets for replacement. Target Model Part No.
4.2.3 4-6 <4. Troubleshooting and Maintenance> Attaching Terminal Cover When a terminal cover is necessary, purchase the following part. Target Model Part No. Sales Unit UT351 T9115YD 1 UT321 T9115YE 1 ■ Attaching Terminal Cover The procedure for attaching the terminal cover is as follows. Do not touch the terminals on the rear panel when power is being supplied to the controller. Doing so may result in electric shock. CAUTION 1.
<4. Troubleshooting and Maintenance> 2. 4-7 With the cover properly folded, fit its top and bottom holes to the protrusions of the mounting brackets. Fit the hole of the terminal cover to the protrusion on the mounting bracket. Attaching Terminal Cover 4.2.4 Replacing Parts with a Limited Service Life The following UT351/UT321 parts have a limited service life. The service life given in the table assume that the controller is used under normal operating conditions.
4.2.5 4-8 <4. Troubleshooting and Maintenance> Replacing Control Output Relays This subsection describes how to replace the control output relays. Since inspection is needed in case of parts replacement, the replacement work should be carried out by a YOKOGAWA engineer or an engineer certified by YOKOGAWA. When replacement is required, contact your nearest YOKOGAWA dealer. Always turn off the power before starting the work in order to avoid electric shock. CAUTION 1.
<4. Troubleshooting and Maintenance> 4-9 4. Hold the bezel and pull it along with the internal unit out of the housing. (Note) Be careful not to damage the RJC sensor. 5. The location and number of the relays differ depending on the model code of the UT351/ UT321. Confirm the location of the control output relay to be replaced before pulling out the relay. Upper Relay (UT351-0 , UT351-3 , UT321-0 or UT321-3 ) 6. Pull out the relay to be replaced.
<4. Troubleshooting and Maintenance> 7. 4-10 Insert the internal unit into the housing. Apply power to the controller and confirm that the initial operating display is shown. If the operating display is not shown properly, turn off the controller and pull out the internal unit. Then, insert it into the housing again. This completes replacement of the control output relay. IM 05D01D12-41E 6th Edition: Mar.
5. <5. Parameters> 5-1 Parameters This chapter contains a parameter map as a guideline for setting parameters, and lists of parameters for recording User Settings. 5.1 Parameter Map IM 05D01D12-41E 6th Edition: Mar.
5-2 <5. Parameters> UT351/UT321 Parameter Map Operating Display SP display SET SET3S OUT display SET3S SET3S Menu OP.PA SET To switch the parameter display, press the SET3S LL A1 A2 A3 AT SC SP.NO PID FL BS UPR DNR OH OL H DR PCCH PCCL HB1 HB2 HC1 HC2 ORB ORH ORL OR 1.SP 2.SP 3.SP 4.SP SET Not displayed when OT parameter set to 4 to 6. Displayed in automatic operation FL is displayed if you press the key when PID = MENU.
<5. Parameters> SET SET3S Press the Press the Press the SET/ENT 5-3 key once. SET/ENT key for 3 seconds. or key once. STUP SET Password check display Password input (No password is required when PWD = 0.) SET Setup Parameter Setting Display Control function related Input/Output related FUNC I/O SET SET PCMD SPH SPL AL1 AL2 AL3 HY1 HY2 HY3 DY1 DY2 DY3 CT CTc PO POc C.MD ZON AR TMU P.SL BPS PRI STP DLN ADR RP.T TEST Not displayed when OT parameter set to 4 to 6.
5.2 5-4 <5. Parameters> Lists of Parameters * Parameters relating to PV or setpoints should all be set in real numbers. For example, use temperature values to define target setpoints and alarm setpoints for temperature input. * The “User Setting” column in the table is provided for the customer to record setpoints.
5-5 <5. Parameters> Parameter Symbol Name of Parameter Setting Range and Description Initial Value PV input filter OFF (0), 1 to 120 second. Used when the PV input fluctuates. OFF (0) PV input bias -100.0% to 100.0% of PV input range span Used to correct the PV input range. OFF (0) 0.0% + 1 digit of PV input range span to 100.0% of PV input range span Set ramp-up-rate or ramp-down-rate per hour or minute. Sets unit in ramp-rate-time unit (TMU). 0.
5-6 <5. Parameters> ● PID-related Parameters The following parameters are displayed when “1Gr” is set to PID parameter display number (PID). In this case, the corresponding target setpoint is 1.SP (target setpoint-1). To set PID corresponding to target setpoint 2 to 4, set “2Gr”, “3Gr”, or “4Gr” to PID. The relevant parameters will then be displayed. Parameter Symbol (1.P) (1.I) (1.
<5. Parameters> 5-7 ■ Auto-tuning Auto-tuning is a function with which the controller automatically measures the process characteristics to automatically set the optimum PID constants. This function does not work when the controller is performing on-off control. The UT351/UT321 employ the “Limit Cycle Method.” As shown in the figure below, the controller temporarily changes its control output in a step-waveform manner.
5-8 <5. Parameters> ■ Hysteresis (for Target Setpoints (On-Off Control) and Alarm Setpoints) Hysteresis can be set in on-off control setpoints and alarm setpoints as well. With the hysteresis settings, it is possible to prevent relays from chattering.
<5. Parameters> 5-9 The figure below shows an example when the Target Setpoint Number (SP.NO) parameter is switched. The 1.SP and 2.SP parameters are set to 500°C and 640°C, respectively. Thus, there is a temperature difference of 140°C between the 1.SP and 2.SP parameters. This example shows how the temperature is changed by as much as this temperature difference over a period of two minutes. In this example, the UPR parameter is 70°C and the TMU parameter is 1 minute. 1.SP 2.SP 2.
5-10 <5. Parameters> ■ Setup Parameters ● Control Function-related Parameters Parameter Symbol Name of Parameter Target setpoint limiter upper limit (SPH) Setting Range and Description Initial Value 0.0 to 100.0% of PV input range where, SPL < SPH Places a limit on the range within which the target setpoint is changed. Target setpoint limiter lower limit User Setting Target Item in CD-ROM 100.0% of PV input range 0.
5-11 <5. Parameters> Parameter Symbol Name of Parameter PID control mode (C.MD) Zone PID selection Setting Range and Description 0: Standard PID control (with output bump at SP change) 1: Fixed Point control (without output bump at SP change) Choose “Fixed Point Control” when controlling pressure or flow rate. OFF: SP selection ON: Zone PID Initial Value User Setting Target Item in CD-ROM 0 Ref.2.1(2) OFF Ref.4.
<5. Parameters> 5-12 ● Precautions for Use of Heater Burnout Alarm (1) The heater burnout alarm can be used only in on-off control (relay output) or in time proportional PID control (relay output, voltage pulse output). It cannot be used in continuous PID control (current output). Only heating-side can be used in heating/cooling control. (Cooling-side cannot be used.) (2) Timing which detects an alarm is as follows.
5-13 <5. Parameters> ● Input-/Output-related Parameters Parameter Symbol (IN) Name of Parameter Setting Range and Description PV input type (PV INPUT terminals) 11 - 12 - 13 terminals PV input unit OFF (0), 1 to 18, 30, 31, 35 to 37, 40, 41, 50, 51, 55, 56 See “Instrument Input Range Codes” in “2. Initial Settings.” OFF (0) °C (0): Degree Celsius °C (0) (UNIT) Max. value of PV input range (RH) Min.
5-14 <5. Parameters> Parameter Symbol Name of Parameter (RTL) Initial Value Retransmission output type 1: PV, 2: SP, 3: OUT, 4: Loop power supply for sensor (15 V) In heating/cooling control, an output value before allocation to heating and cooling control (0 to 100%) is transmitted if setpoint “3” is selected (0 to 50%: Cooling-side output; 50 to 100%: Heating-side output). 1 Max. value of retransmission output scale Min.
<5. Parameters> 5-15 ■ Functions of Active Color PV Display This part describes the functions of “Active Color PV Display.” PV display color is changed by the following four actions. PV display is selectable from red-to-green or green-to-red changing action, or fixed color. - Link to alarm 1 mode (when PCMD = 2, 3) (Setting example-1) Link to alarm 1 and 2 mode (when PCMD = 4, 5) is the same. When either of the alarms occurs, the display color is changed.
<5. Parameters> 5-16 Setting Example-3 : Link to PV Set high limit “70°C” for PCCH, and low limit “20°C” for PCCL. PV display color is changed from green to red when PV input value is out of the range. The red-to-green changing action is selectable. Setting parameters PCMD (PV color mode parameter) = 6 PCCH (High limit for PV color change parameter) = 70°C PCCL (Low limit for PV color change parameter) = 20°C Hysteresis fixed to 0.25% is inserted where PV display color is changed.
<5. Parameters> 5-17 ■ External RJC The external RJC is not a compensation function built in a controller but a compensation function working outside the controller. The external RJC is used when the input is thermocouple, and RJC=OFF. Using external RJC makes the accuracy of RJC higher and shortens the compensating wire..
<5. Parameters> 5-18 ■ Useful Operating Displays (SELECT Display) Registering frequently changed parameters in the SELECT display after ordinary operating displays will allow you to change settings easily. A maximum of four displays can be registered.
<5. Parameters> 5-19 ■ Heating/Cooling Control (for a Heating/Cooling Controller Only) In heating/cooling control, the controller outputs the result of computation after splitting it into heating-purpose and cooling-purpose signals. In addition, the controller can perform PID control or on-off control on the heating and cooling sides separately. When performing on-off control, set the proportional band to “0”.
5-20 <5. Parameters> ■ Cycle Time A cycle time can only be set if the type of control output is time proportional PID relay output or time proportional voltage pulse output. A cycle time refers to one period consisting of on-and off-state time lengths. The ratio of the on-state time to the off-state time differs according to the value of the control output. The figure below shows on-to-off time ratios of the control output when the cycle time is set to 10 seconds.
6. <6. Function Block Diagram and Descriptions> 6-1 Function Block Diagram and Descriptions This chapter contains the function block diagrams for “Standard type,” and “Heating/cooling type.” For details on these function block diagrams, refer to the descriptions mentioned later. IM 05D01D12-41E 6th Edition: Mar.
6-2 <6. Function Block Diagram and Descriptions> ■ Function Block Diagram for Standard Type PV input terminals 11 , 12 and 13 Communication terminals 23 to 27 PV INPUT RS485 Contact input DI1 DI2 Input selection Unit selection Input range conversion Input bias Input filter SP.NO Target setpoints 1 to 4 REMOTE SP.NO=0 LOCAL SP.
6-3 <6. Function Block Diagram and Descriptions> ■ Function Block Diagram for Heating/Cooling Type PV input terminals 11 , 12 and 13 Communication terminals 23 to 27 PV INPUT RS485 Contact input DI1 DI2 Input selection Unit selection Input range conversion Input bias Input filter SP.NO Target setpoints 1 to 4 REMOTE SP.NO=0 LOCAL SP.
<6. Function Block Diagram and Descriptions> 6-4 Functions and Parameters for “Standard Type” in Initial State (Factory-set default) Functions and parameters in initial state are given in the tables below. For details on each parameter, refer to “5.2 Lists of Parameters.” ■ PV Input PV input (INPUT) is a universal input, which can receive signals from thermocouple, RTD, or DC voltage signals. The controller is capable of biasing, and first-order lag computation (filtering) on input signals.
<6. Function Block Diagram and Descriptions> 6-5 ■ Contact Input Changing the setpoint of the parameter DIS (DI function selection) allows you to change the function of contact input. ● When DIS=OFF No function for contact input. ● When DIS=1 (factory-set default) Target setpoint 2 (ON)/Target setpoint 1 (OFF) switching function is assigned to DI1 (contact input 1). Automatic (ON)/Manual (OFF) switching function is assigned to DI2 (contact input 2).
6-6 <6. Function Block Diagram and Descriptions> ■ Target Setpoint and PID It is possible to use a maximum of four groups of target setpoints and PID parameters. The target setpoint can be selected by key operation or contact input. For selection by contact input, refer to “Contact Input.” Operating Parameters Function Parameter Menu Target setpoint number selection SP.NO OP.PA Target setpoints 1 to 4 n.SP OP.PA Proportional band (P) n.P OP.PA Integral time (I) n.I OP.
<6. Function Block Diagram and Descriptions> 6-7 ■ Control Output Control output (OUTPUT1) selects the output type among the current output, voltage pulse output, and relay contact output signal. Preset output value is output when the operation is stopped by key operation or contact input, which takes priority over the manual operation. Each function can be set by the following parameters.
<6. Function Block Diagram and Descriptions> 6-8 ■ Retransmission Output PV, target setpoint, or control output can be output to retransmission output (OUTPUT2/ RET). Each function can be set by the following parameters. Setup Parameters Function Parameter Menu Retransmission output type RET I/O Retransmission output scale RTH, RTL I/O ■ 15 V DC Loop Power Supply The 15 V DC loop power supply (OUTPUT2/RET) uses the same terminal as retransmission output.
i Revision Information ● Title : Model UT351/UT321 Digital Indicating Controllers User’s Manual ● Manual No. : IM 05D01D12-41E May 2002/1st Edition Newly published May 2003/2nd Edition Complies with safety and EMC standards. Jun 2003/3rd Edition Addition of Model UT321. Sep 2003/4th Edition Complies with safety and EMC standards for Model UT321. Jul 2004/5th Edition Change of the company name. Mar 2005/6th Edition Addition of alarm function.
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