imhCVR.
imhCVR.QXD 3/8/02 10:12 AM Page 2 INTRODUCTION The Intelligent Meter for Thermistor Inputs (IMY) is another unit in our multipurpose series of industrial control products that are field-programmable to solve multiple applications. This series of products is built around the concept that the end user has the capability to program different personalities and functions into the unit in order to adapt to different indication and control requirements.
Table of Contents SAFETY INFORMATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3 Safety Summary · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3 GENERAL DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4 Theory Of Operation · · · · · · · · · · · · · · · · ·
Command String Examples · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 28 Receiving Data from the IMY · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 30 Current Loop Installation · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 30 Serial Terminal Descriptions · · · · · · · · · · · · · · · · · · · · · · · · · · ·
SAFETY INFORMATION SAFETY SUMMARY All safety related regulations, local codes and instructions that appear in the manual or on equipment must be observed to ensure personal safety and to prevent damage to either the instrument or equipment connected to it. If equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. Do not use this unit to directly command motors, valves, or other actuators not equipped with safeguards.
GENERAL DESCRIPTION More than one unit can be connected in the loop with other RLC products which have serial communications capabilities. An optional 4 to 20 mA or 0 to 10 VDC re-transmitted analog output can be scaled by the user to interface with a host of recorders, indicators and controllers. The type of analog output is determined by the model ordered. (See Ordering Information for available models.) The indicator has several built-in diagnostic functions to alert operators of most malfunctions.
BLOCK DIAGRAM *Reference Installation and Connections section for power connection. Note: Analog “-” and Alarm common are separate and isolated from the signal common. The commons should NOT be tied together.
PROGRAMMING AND OPERATING THE IMY PROGRAMMING THE IMY Although the unit has been programmed at the factory, the set-ups will generally have to be changed to suit the application. Basic set-up is complete after selection of the temperature units, decimal point placement, and selection of the digital filtering level.
DISPLAY DISPLAY RESULT OF “P” BUTTON “Pro” < > “0” - Causes the indicator to return to normal display mode. Any changes to set-up data are permanently stored in the E2PROM. “Pro” < > “1” - Entry into this module allows the user to select the Thermistor type, whether the display will read in degrees Fahrenheit (F) or Celsius (C), and display decimal point position. “Pro” < >“2” - Entry into this module allows the user to select non-standard display slope and display offset values.
MODULE #1 - PROGRAM THERMISTOR TYPE, TEMPERATURE SCALE (F OR C) AND DECIMAL POINT POSITION Select the desired Thermistor type by pressing the “UP” or “DOWN” button. “tYPE” < > “400” “700” 400 = 400 Series, 2,252 ohm 700 = Thermolinearä Series Select the desired temperature scale by pressing the “UP” or “DOWN” button. “SCALE” < > “F” “C” Select the desired decimal point location by pressing the “UP” or “DOWN” button. “ dECPNt” < > “0” “0.
MODULE #3 - PROGRAM FUNCTIONS ACCESSIBLE W/ FRONT PANEL LOCKOUT This programming module programs what is accessible through the front panel when the PGM. DIS. pin is connected to common (COMM.). Note: The term “Quick Programming” is used to refer to the ability to change the information that can be accessed from the front panel when the “PGM. DIS.” terminal is connected to “COMM.”.
TEMPERATURE OFFSET VALUE = If the Integrator/Totalizer/Peak/Valley/Temperature Offset option is installed, this selects whether the programmed offset value will be displayed. “dSPOFF” < > “yES” or “NO” ENTER OFFSET VALUE = If “YES” was selected for the previous step, this selects whether the offset value can be entered from the panel. (If “NO” was selected, then this step defaults to “NO” and will not be displayed for selection.
MODULE #4 - PROGRAM DIGITAL FILTER AND REMOTE INPUT PROGRAM DIGITAL FILTERING totalization enable control from Time 1 to Time 2. “3” - A low level allows totalization as long as the input is low. If the input goes high, totalization is stopped and the contents are saved. This acts as a totalization enable control from Time 1 to Time 2. “4” - A low level holds the display (display hold). While this input is low, the indicator continues to process the input signal and drive the alarms, totalizer, etc.
PROGRAM FUNCTION OF E1-CON AND OPTIONAL E2-CON (Cont’d) “9” - If the alarm option is installed, a low level resets a latched or unlatched alarm into its inactive state. This provides manual override of alarms for system start-up and other unusual events such as system testing. “10” - A negative going edge toggles the display between “input” and “total” (from input to total, or vice versa). No action is taken on the positive going edge.
MODULE #5 - PROGRAM INTEGRATOR/TOTALIZER Programming for the integrator/totalizer consists of four programming steps: totalizer decimal point position, time base, scale factor and low temperature disable. Note that the decimal point position of the integrator/totalizer can be set independent of the decimal point position of the input. The totalizer value will roll over and flash when the total exceeds, 999999 or -99999, indicating an overflow condition.
MODULE #6 - PROGRAM ALARM/SETPOINT ALARM #1 ASSIGNMENT TO INPUT OR INTEGRATOR/TOTALIZER If the alarm option is installed, this module is used to configure the operation of the alarms to a variety of combinations. The programmable options are HI/LO acting, auto/manual reset (latching), tracking, assignment to input or integrator/totalizer, display alarms, alarm values and hysteresis (deadband) values. Alarm #1 may be programmed to activate on either the input or the integrator/totalizer value.
ALARM #2 ASSIGNMENT TO INPUT OR INTEGRATOR/ TOTALIZER Alarm #2 may be programmed to activate on either the input or the integrator/totalizer value. If the integrator/totalizer option is not installed, this step defaults to the input. “ASN-2” < > “INPUt”or “totAL” PROGRAM VALUE FOR ALARM #2 The range of the alarm value is -999 to 9,999 for the input display and -99999 to 999999 for the totalizer option display.
MODULE #7 - PROGRAM SERIAL COMMUNICATIONS “Print” < > “0” - input signal “1” - input signal, peak, valley and offset “2” - input signal, alarm 1 and alarm 2 “3” - input signal, alarm 1, alarm 2, hysteresis 1, hysteresis 2, peak, valley, and offset “4” - totalizer “5” - input signal and totalizer “6” - input signal, totalizer, peak, valley, and offset “7” - totalizer, alarm 1, and alarm 2 “8” - input signal, totalizer, alarm 1, and alarm 2 “9” - input signal, totalizer, alarm 1, alarm 2, hysteresis 1, hyster
MODULE #8 - PROGRAM RE-TRANSMITTED ANALOG OUTPUT This programming module allows digital scaling of the 4 to 20 mA or 0 to 10 VDC analog output. The type of analog output is determined by the model ordered. (See Ordering Information for available models.) The display value at which 4 mA or 0 VDC and the display value at which 20 mA or 10 VDC are transmitted are keyed-in. The indicator automatically calculates slope and intercept values to complete the scaling.
MODULE #9 - SERVICE OPERATIONS The indicator has been fully calibrated at the factory. If the unit appears to be indicating incorrectly or inaccurately, refer to the troubleshooting section before attempting this procedure. When re-calibration is required (generally every 2 years), this procedure should only be performed by qualified technicians using appropriate equipment. Resistance source accuracies of 0.01% or better are required.
OPERATING THE IMY The other operations in the “quick programming” mode require special key sequences as shown: After completing all set-up operations, the unit is ready to install and operate. After power is applied, a display test consisting of illuminating all segments for 2 seconds is performed. Afterward, the input or total will appear, depending upon the display mode prior to the last power-down.
FACTORY CONFIGURATION The following chart lists the programming of the unit when shipped from the factory. (In Program Module #9, Code 66 will restore the unit to these values.) “Pro 1”..... “tYPE” - “700” “SCALE” - “F” “dECPNt” - “0.0” “Pro 2”..... “SLOPE” - “1.0000” “OFFSEt” - “0.0 F” “Pro 3”..... “dSP AL” “ENt AL” “dSPHYS” “ENtHYS” “rSt AL” “dSPbUF” “rStbUF” “SELdSP” “rSttOt” “dSPOFF” “ENtOFF” - “yES” “yES” “yES” “yES” “yES” “yES” “yES” “yES” “yES” “yES” “yES” “Pro 4”.....
PROGRAMMING EXAMPLE As an example of a programming sequence, the following values, gained from a temperature-time monitoring application, are programmed into the indicator. DISPLAY: Display the actual temperature of a liquid solution in °F. Activate alarm #1 output when temperature falls below 25°F, activate display alarm. Peak and valley (max/min) readings for each cycle to be recorded.
TEMPERATURE MONITORING EXAMPLE An IMY is installed as a monitoring device and back-up controller for a freezer storage facility. Normally, the freezer temperature is maintained at about -29°C ±2°. The absolute maximum allowable temperature of the freezer is 0°C. In the event of a system failure, alarm output #1 of the IMY is programmed to start a secondary cooling system should the temperature reach 0°C.
INTEGRATOR / TOTALIZER / PEAK / VALLEY / TEMPERATURE OFFSET (Optional) INTEGRATOR/TOTALIZER valuable in monitoring the limits of the process over any length of time since these values are stored at power-down to span over shifts, days, etc. An external input can be programmed to reset or engage the unit into a peak/valley reading indicator. Additionally, the peak and valley can be viewed and reset from the front panel, if so programmed, and viewed and reset from the serial communication option.
OFFSET AND SLOPE DISPLAY TEMPERATURE (Cont’d) INTEGRATOR/TOTALIZER SET-UP SET-UP: With an average temperature input which gives a display of 110.0° at the end of an 8 hour time period (one shift), the following formula applies: “Pro 2” ..... “SLOPE” - 1.0638 “OFFSEt” - -5.3 This feature allows the operator to manipulate the displayed temperature reading.
S.F . = 110 110 ( ) 3600RR R 28800 (8 Hours x 3600) x x 10 10 S.F. = 1x.125 S.F. = .125 “Pro 5”.....“dECPNt” “tbASE ” “SCLFAC” “Lo-cut ” - 0.0 2 .125 0.0 This value is normally 1, but can be used as a course scale factor of 60 or 3600. RR Since the time period is in Hrs., the selected T.B. is 3600 (Program select value = 2) which equals per hour (3600 sec.). R The integrator/totalizer will accumulate up to 99999.9.
ALARMS (Optional) alarm shuts off the process. When tracking is programmed, changing the shut-off trip value (Alarm #2) automatically changes Alarm #1 so that the offset between Alarm #2 and Alarm #1 remains the same. Alarm and hysteresis values can be modified through the optional serial communications to provide automatic control. The following diagrams depict how the alarms work with both “HI” and “LO” acting set-ups.
20 mA CURRENT LOOP SERIAL COMMUNICATIONS (Optional) GENERAL DESCRIPTION DATA FORMAT-10 BIT FRAME [300, 600, 1200, 2400 Baud] The serial communication option is a half-duplex, two-way, 20 mA loop that can connect to a variety of printers, computers, terminals and controllers to suit many data-polling or automatic operation applications. The indicator responds to a host of commands, including change alarm value, reset totalizer and transmit input value.
SENDING COMMANDS TO THE IMY The command string is constructed in a specific logical sequence. The indicator will reject command strings that do not conform. Only one operation can be performed per command string. Below is a description of how to construct a command string. 1. If the indicator has an address other than zero, the first two characters of the string must consist of the address command (N) followed by the unit address number (0-99).
If illegal commands or characters are sent to the IM, an asterisk (*) must be sent to clear the input buffer. The IM will not respond to an illegal or incomplete transmission. The diagrams show the difference in the timing considerations for either Abbreviated or Full Character Transmission, or if a Reset Command is issued.
RECEIVING DATA FROM THE IMY Examples of transmissions are as follows: 2 INP -125.7F < CR> < LF > full transmission -125.7 < CR> < LF > abbreviated transmission Data is transmitted from the indicator whenever a “T” or “P” command is received via serial communications or a remote input, E1-CON or optional E2-CON pin is programmed for print request, is activated. If the abbreviated transmission was programmed, just data will be transmitted with no built-in delay.
SERIAL COMMUNICATIONS EXAMPLES CONNECTING TO AN RLC PRINTER The drawing shows the indicator with the 20 mA Serial Communication Option set-up with an RLC Model DMPC printer. An external current source is required to implement the printer’s busy signal to the indicator’s receive loop, which prevents overruns. The “Print switch” is a momentary contact, push button type connected between the E2-CON (TBA #8) and the signal common (TBA #7).
PROCESS CONTROLLING SYSTEM An application program is written, which sends and retrieves data from the IMYs. Six Model IMYs with Serial Communication Option are used to monitor and control the temperature of 6 ovens at a large bakery. The IMYs are located at each of the ovens in the production area of the building. The communications lines are run to an industrial computer located in the production offices. The drawing below shows the Current Loop set-up.
RE-TRANSMITTED ANALOG OUTPUT (Optional) by calculating the slope and intercept of the display/output and calculating the required display values at 4 mA or 0 VDC and 20 mA or 10 VDC. Reverse action can be achieved by programming a “high” display value for “AN-Lo” and a “low” display value for “AN-HI”. If the display should indicate an “OLOLOL”, “ULULUL”, or “SHort” the analog output will go to 20 mA or 10 VDC for an “OLOLOL” or “SHort”, and 4 mA or 0 VDC for a “ULULUL”.
ANALOG OUTPUT CALIBRATION Although the analog output has been calibrated at the factory, zero and span adjustments are provided to compensate for small offsets and drifts. If excessive drift is noticed, the following calibration procedure may be performed. Scale the analog output by entering an arbitrarily larger display value for “AN-HI” then for “AN-LO”, in “PRO 8”. Note: Set the analog output source assignment for input.
APPENDIX “A” - INSTALLATION & CONNECTIONS INSTALLATION ENVIRONMENT Do not use tools of any kind (screwdrivers, pens, pencils, etc.) to operate the keypad of the unit. Before installing the IM into the panel, the user should first become familiar with the unit. It may also be desirable to program the unit for the application. When programming is complete, all parameters will be saved in non-volatile memory. The Program Disable (PGM.DIS.) terminal should be connected to COMM.
EMC INSTALLATION GUIDELINES 5. In extremely high EMI environments, the use of external EMI suppression devices, such as ferrite suppression cores, is effective. Install them on Signal and Control cables as close to the unit as possible. Loop the cable through the core several times or use multiple cores on each cable for additional protection. Install line filters on the power input cable to the unit to suppress power line interference. Install them near the power entry point of the enclosure.
WIRING CONNECTIONS The 700 Series Thermolinearä thermistor is a 3-wire sensor. One lead connects to TBA #6 (T1) and the common lead connects to TBA #7 (comm). The third wire is an additional thermistor lead and connects to TBA #5 (T2). Always refer to the sensor manufacturer’s instructions for probe wiring connections, if available. After the unit has been mechanically mounted, it is ready to be wired. All conductors should meet voltage and current ratings for each terminal.
APPENDIX “B” - SPECIFICATIONS AND DIMENSIONS 1. DISPLAY: 4-digit with F/C indication, 0.56" (14.2 mm) high LED, minus sign displayed for negative temperatures. 6-digits for integrator/ totalizer. “Flashing” display for totalizer overflow. “ULULUL” displayed for input overload and “OLOLOL” displayed for underload (negative overload). 2. POWER REQUIREMENTS: Switch selectable 115/230 VAC, ±10%, 50/60 Hz, 14 VA. Isolation: 2300 Vrms for 1 min. To all inputs and outputs. Working Voltage: 300 V max., CAT II 3.
15. ENVIRONMENTAL CONDITIONS: Operating Temperature Range: 0 to 50°C Storage Temperature Range: -40 to 80°C Operating and Storage Humidity: 85% max. relative humidity (non-condensing) from 0°C to 50°C. Altitude: Up to 2000 meters 16. SERIAL COMMUNICATIONS (Optional): Isolation To Signal Input Common: 500 Vrms for 1 min. Working Voltage: 50 V max., CAT I Not isolated from all other commons. Type: Bi-directional 20 mA current loop, 20 mA source provided on transmit loop.
20. CERTIFICATIONS AND COMPLIANCES: SAFETY IEC 1010-1, EN 61010-1: Safety requirements for electrical equipment for measurement, control and laboratory use, Part 1.
APPENDIX “C” - TROUBLESHOOTING GUIDE The majority of all problems with the indicator can be traced to improper connections or improper programming set-ups. Be sure all connections are clean and tight and check the programming set-ups for correct data. For further technical assistance, contact technical support at the appropriate company numbers listed. PROBLEM POSSIBLE CAUSE REMEDIES NO DISPLAY 1. Power off, improperly connected, or brown-out. 1a. Check wiring. b. Verify power.
APPENDIX “D” - PROGRAMMABLE FUNCTIONS Programming of the indicator is divided into modular steps. Each module is a short sequence of data entries. The front panel buttons “UP” and “DOWN” (shown as “arrows” on the front panel) are used to change the data and set-ups, while the “P” button is used to save or enter the data. After pressing “P”, which gains entry into the programming mode, the programming modules are identified by the message “Pro” and a number in the display.
APPENDIX “D” - PROGRAMMABLE FUNCTIONS (Cont’d) “Pro 7” - PROGRAM SERIAL COMMUNICATIONS “bAud” - Enter baud rate “AddrES” - Enter loop address number (0-99) “Print” - Enter print function, or “P” command function through “Pro 5” - PROGRAM INTEGRATOR/TOTALIZER “dECPNt” - Enter decimal point for totalizer “tbASE” - Enter time base 0 - second 1 - minute 2 - hour “SCLFAC” - Enter multiplying scale factor “Lo-cut” - Enter low-signal cut out “Pro 6” - PROGRAM ALARMS “trAc” - Enable alarm value tracking “dISP” - E
APPENDIX “E” - ORDERING INFORMATION TOTALIZER/ PART NUMBERS FOR AVAILABLE PEAK/VALLEY ALARM SERIAL ANALOG SUPPLY VOLTAGES SLOPE/OFFSET OUTPUT OUTPUT OUTPUT 115/230 VAC E2-CON NO NO NO NO IMY00160 NO YES NO NO IMY00162 YES NO NO NO IMY02160 YES NO YES NO IMY02161 Intelligent Meter IMY for Thermistor Inputs YES YES NO NO IMY02162 YES NO NO 4 to 20 mA IMY02163 YES YES YES 4 to 20 mA IMY02167 YES YES YES 0 to 10 VDC IMY02169 For information on Pricing, Enclosures & Panel Mount Kits refer to the RLC Catalog or c
imhCVR.QXD 3/8/02 10:12 AM Page 3 LIMITED WARRANTY The Company warrants the products it manufactures against defects in materials and workmanship for a period limited to one year from the date of shipment, provided the products have been stored, handled, installed, and used under proper conditions. The Company’s liability under this limited warranty shall extend only to the repair or replacement of a defective product, at The Company’s option.
imhCVR.QXD 3/8/02 10:12 AM Page 4 IMY/IM-A 3/02 DRAWING NO.
