Important User Information Because of the variety of uses for this product and because of the differences between solid state products and electromechanical products, those responsible for applying and using this product must satisfy themselves as to the acceptability of each application and use of this product. For more information, refer to publication SGI–1.1 (Safety Guidelines For The Application, Installation and Maintenance of Solid State Control).
Purpose of Manual This manual shows you how to use your RTD input module with an Allen–Bradley programmable controller. It helps you install, program, calibrate, and troubleshoot your module. Audience You must be able to program and operate an Allen–Bradley programmable controller (PLC) to make efficient use of your input module. In particular, you must know how to program block transfer instructions. We assume that you know how to do this in this manual.
P–2 Using This Manual Appendices Appendix C Data Formats Information on BCD, signed magnitude (12-bit) binary, and 2's complement binary Appendix D Block Transfer with Mini-PLC-2 and Mini-PLC-2/20 How to use GET-GET instructions for block transfer with Mini-PLC-2 and Mini-PLC-2/20 processors Appendix E 2 and 4-wire RTD Sensors Shows wiring connections for 2 and 4-wire sensors Appendix F Differences Between Series A, B, C and D Identifies major differences between the series A, B, C, and D of th
Using This Manual P–3 Do not use this module with Cat. No. 1771-AL adapter, PLC-2/20 or 2/30 programmable controllers. Do not put the module in the same module group as a discrete high density module unless you are using 1 or 1/2 slot addressing. Avoid placing this module close to AC modules or high voltage DC modules. Related Publications For a list of publications with information on Allen–Bradley programmable controller products, consult our publication index SD499.
P–4 Using This Manual
Table of Contents Overview of the RTD Input Module Chapter 1 Installing the RTD Input Module Chapter 2 Module Programming Chapter 3 Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Features of the Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . How Analog Modules Communicate with Programmable Controllers Communication Between Processor and Module . . .
toc-ii Table of Contents Configuring Your RTD Module Chapter 4 Module Status and Input Data Chapter 5 Calibrating Your Module Chapter 6 Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . About Configuring Your RTD Module . . . . . . . . . . . . . . . . . . . . . . . Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selecting Format for Reading Data . . . . . . . . . . . . . . . . . . . . RTD Type . . . . . . . . . . . .
Table of Contents Troubleshooting Chapter 7 Chapter Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostics Reported by the Module . . . . . . . . . . . . . . . . . . . . . . . Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Reported in Words 1 and 2 . . . . . . . . . . . . . . . . . . . . . Status Reported in Word 13 . . . . . . . . . . . . . . . . . . . . . . . . . Chapter Summary . . . . . . . . . . . . . . . . . . . .
Table of Contents
Chapter 1 Overview of the RTD Input Module Chapter Objectives This chapter gives you information on: • features of the input module • how an input module communicates with programmable controllers Module Description The RTD input module is an intelligent block transfer module that interfaces analog input signals with any Allen–Bradley programmable controllers that have block transfer capability.
1–2 Overview of the RTD Input Module When using 10 ohm copper RTDs, you must dedicate your module for exclusive use with 10 ohm copper RTDs. You can configure the module to accept signals from any combination of 100 ohm platinum and other types of non–copper RTDs. Both cases are determined by block transfer write (BTW) selection.
Overview of the RTD Input Module 1–3 5. The processor and module determine that the transfer was made without error, and that input values are within specified range. 6. Your ladder program can use and/or move the data (if valid) before it is written over by the transfer of new data in a subsequent transfer. 7. Your ladder program should allow write block transfers to the module only when enabled by the operator at power–up.
1–4 Overview of the RTD Input Module
Chapter 2 Installing the RTD Input Module Chapter Objectives This chapter gives you information on: • • • • • Before You Install Your Input Module calculating the chassis power requirement choosing the module’s location in the I/O chassis keying a chassis slot for your module wiring the input module’s field wiring arm installing the input module Before installing your input module in the I/O chassis you must: You need to: As described under: Calculate the power requirements of all modules in each c
2–2 Installing the RTD Input Module EMC Directive This product is tested to meet Council Directive 89/336/EEC Electromagnetic Compatibility (EMC) and the following standards, in whole or in part, documented in a technical construction file: • EN 50081-2EMC – Generic Emission Standard, Part 2 – Industrial Environment • EN 50082-2EMC – Generic Immunity Standard, Part 2 – Industrial Environment This product is intended for use in an industrial environment.
Installing the RTD Input Module 2–3 Group your modules to minimize adverse affects from radiated electrical noise and heat. We recommend the following. • Group analog input and low voltage dc modules away from ac modules or high voltage dc modules to minimize electrical noise interference. • Do not place this module in the same I/O group with a discrete high-density I/O module when using 2-slot addressing. This module uses a byte in both the input and output image tables for block transfer.
2–4 1 Installing the RTD Input Module Place the module in the card guides on the top and bottom of the chassis that guide the module into position. Important: Apply firm even pressure on the module to seat it into its backplane connector. 1771ĆA1B, ĆA2B, ĆA3B, ĆA4B I/O chassis 1771ĆA1B, ĆA2B, ĆA4B Series B I/O chassis Snap the chassis latch over the top of the module to secure it. 2 Swing the chassis locking bar down into place to secure the modules. Make sure the locking pins engage.
Installing the RTD Input Module 1 2 3 4 5 6 Connection Diagram for the RTD Input Module (1771ĆIR/D) Terminal Identification 18 C 17 B 16 A 15 C 14 B 13 A 12 C 11 B 10 A 9 C 8 B 7 A 6 C 5 B 4 A 3 C 2 B 1 A (Channel 1 shown) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Channel 2–5 Functional Ground RTD Refer to Appendix E for 2-wire and 3-wire RTD connections. Field Wiring Arm Cat. No. 1771ĆWF 11846ĆI The sensor cable must be shielded.
2–6 Installing the RTD Input Module Ground the Chassis and Module Use the following diagrams to ground your I/O chassis and isolated analog input module. Follow these steps to prepare the cable: 1 Chassis Ground When you connect grounding conductors to the I/O chassis grounding stud, place a star washer under the first lug, then place a nut with captive lock washer on top of each ground lug. Remove a length of cable jacket from the Belden 8761 cable.
Installing the RTD Input Module Interpret Status Indicators 2–7 The front panel of the RTD input module contains a green RUN indicator and a red FAULT indicator. At power-up, the module momentarily turns on both indicators as a lamp test, then checks for: • correct RAM operation • EPROM operation • EEPROM operation • a valid write block transfer with configuration data If there is no fault, the red indicator turns off.
2–8 Installing the RTD Input Module
Chapter Chapter Objectives 3 In this chapter, we describe • Block Transfer programming • Sample programs in the PLC–2, PLC–3 and PLC–5 processors • Module scan time issues Block Transfer Programming Your module communicates with the processor through bidirectional block transfers. This is the sequential operation of both read and write block transfer instructions.
3–2 Module Programming PLC-2 Program Example Note that PLC–2 processors that do not have the block transfer instruction must use the GET–GET block transfer format which is outlined in Appendix D. Figure 3.1 PLC-2 Family Sample Program Structure Block Transfer Read Done Bit 1 Pushbutton 1 2 3 4 Block Transfer Write Done Bit 5 Done DN 15 Storage Bit A L Storage Bit B L Storage Bit B Power-up Bit U Power-up Bit Storage Bit A Storage Bit B Power-up Bit 7 Storage Bit A 1 Publication 1771Ć6.
Module Programming 3–3 Program Action Rung 1 – Block transfer read buffer: the file–to–file move instruction holds the block transfer read (BTR) data (file A) until the processor checks the data integrity. 1. If the data was successfully transferred, the processor energizes the BTR done bit, initiating a data transfer to the buffer (file R) for use in the program. 2. If the data is corrupted during the BTR operation, the BTR done bit is not energized and data is not transferred to the buffer file.
3–4 Module Programming PLC-3 Program Example Block transfer instructions with the PLC–3 processor use one binary file in a data table section for module location and other related data. This is the block transfer control file. The block transfer data file stores data that you want transferred to the module (when programming a block transfer write) or from the module (when programming a block transfer read). The address of the block transfer data files are stored in the block transfer control file.
Module Programming 3–5 Rungs 1 and 2 – Rungs 1 and 2 are the block transfer read and write instructions. The BTR enable bit in rung 1, being false, initiates the first read block transfer. After the first read block transfer, the module performs a block transfer write and then does continuous block transfer reads until the pushbutton is used to request another block transfer write. After this single block transfer write is performed, the module returns to continuous block transfer reads automatically.
3–6 Module Programming A subsequent BTW operation is enabled by a pushbutton switch (rung 2). Changing processor mode will not initiate a block transfer write unless the first pass bit is added to the BTW input conditions. Module Scan Time Scan time is defined as the amount of time it takes for the input module to read the input channels and place new data into the data buffer. Scan time for your module is shown in specifications, appendix A.
Chapter 4 Configuring Your RTD Module Chapter Objectives About Configuring Your RTD Module In this chapter you will read how to configure your module’s hardware, condition your inputs and enter your data. Because of the many analog devices available and the wide variety of possible configurations, you must configure your module to conform to the analog device and specific application that you have chosen.
4–2 Configuring Your RTD Module Data Format You must indicate what format will be used to read data from your module. Typically, BCD is selected with PLC–2 processors, and binary (also referred to as integer or decimal) is selected with PLC–3 and PLC–5 processors. See below and Appendix C for details on Data Format.
Configuring Your RTD Module Real Time Sampling 4–3 The real time sampling (RTS) mode of operation provides data from a fixed time period for use by the processor. RTS is invaluable for time based functions (such as PID and totalization) in the PLC. It allows accurate time based calculations in local or remote I/O racks. In the RTS mode the module scans and updates its inputs at a user defined time interval ( ∆T) instead of the default interval.
4–4 Configuring Your RTD Module Configuring Block for a Block Transfer Write The complete configuration block for the block transfer write to the module is defined in below. Configuration Block for RTD Input Module Block Transfer Write Dec.
Configuring Your RTD Module Word Bits Word 1 Cont. Description Ohms 1 0 Not used 1 1 bit 08 (10) In temperature mode: 0 = Entire module is platinum 1 = Entire module is 10 ohm copper. Enter exact value in word 2.
4–6 Configuring Your RTD Module Word Bits Description Word 15 Auto-calibration request word - used to automatically calibrate selected channels and save the calibration constants in EEPROM.
Chapter 5 Module Status and Input Data Chapter Objectives In this chapter you will read about: • reading data from your module • input module read block format Reading Data from the RTD Module Block transfer read programming moves status and data from the input module to the processor’s data table in one I/O scan. The processor user program initiates the request to transfer data from the input module to the processor.
5–2 Module Status and Input Data Table 5.A Bit/Word Description for RTD Input Module (1771-IR Series D) Word Word 1 Word 2 Words 3-8 Bit Definition Bits 00-05 Underrange indication for each channel; set when input is below the normal operating range for copper or platinum RTD. Bit 00 for input 1, bit 01 for input 2, etc. See Table 5.B. Bit 06 Power-up bit is set when the module is alive but not yet configured. Bit 07 EEPROM calibration values could not be read.
Module Status and Input Data Word Word 9 (cont.) Bit 5–3 Definition Bit 07 Bits 08-15 (10-15) Faulty calibration (no save) Channel failed calibration. Bit 10 for input 1, bit 11 for input 2, etc. Table 5.D Overrange and Underrange Values Indication BTW Word 1, Bit 10 RTD Underrange 0 Platinum Overange Underrange Overrange Chapter Summary 1 Copper Ohms oC oF < 1.00 < -200 < -328 > 600.00 > 870 > 1598 < 1.00 < -200 < -328 > 327.
5–4 Module Status and Input Data
Chapter Chapter Objective Tools and Equipment In this chapter we tell you how to calibrate your modules. In order to calibrate your input module you will need the following tools and equipment: Tool or Equipment Description Model/Type Available from: Industrial Terminal and Interconnect Cable Programming terminal for A-B family processors Cat. No. 1770-T3 or Cat. No. 1784-T45, -T50, etc. Allen-Bradley Company Highland Heights, OH Precision Resistors 1.
6–2 Calibrating Your Module Performing Auto-calibration Calibration of the module consists of applying 1.00 ohm resistance across each input channel for offset calibration, and 402.00 ohm across each input channel for gain correction. Offset Calibration Normally all inputs are calibrated together. To calibrate the offset of an input, proceed as follows: 1. Connect 1.00 ohm resistors across each input channel as shown in Figure 6.1. Figure 6.
Calibrating Your Module 6–3 Write Block Transfer Word 15 Word Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 &"# #, $# * ,#'& '& " && $ '* , ," + #,+ ,' 02 01 00 )- +, -,' $# * ,#'& , ," + #,+ ,' )- +, . $- + )- +, #& $ )- +, !!+ , $ NOTE: Normally, all channels are calibrated simultaneously (bits 10–15 of word 15 are octal 0). To disable calibration on any channel, set (1) the corresponding bit 10 through 15 of word 15. 4.
6–4 Calibrating Your Module Gain Calibration Calibrating gain requires that you apply 402.00 ohms across each input channel. Normally all inputs are calibrated together. To calibrate the gain of an input, proceed as follows: 1. Connect 402.00 ohm resistors across each input channel as shown in Figure 6.2 below. Figure 6.
Calibrating Your Module 6–5 4. Queue BTRs to monitor for gain calibration complete and channels which may not have calibrated successfully. Save Calibration Values If any ”uncalibrated channel” bits (bits 10–15 of BTR word 9) are set, a save cannot occur. Auto–calibration should be performed again, starting with offset calibration. If the module has a faulty channel, the remaining functioning channels can be calibrated by inhibiting calibration on the faulty channel.
6–6 Calibrating Your Module Words 9 through 14 in the write block transfer file are the module calibration words. Word 9 corresponds to channel 1, word 10 to channel 2, and so on. Each word is composed of two bytes: the upper byte is for offset correction and the lower byte is for gain correction. Refer to the table below.
Calibrating Your Module 6–7 Offset Calibration 1. Attach the 1.00 ohm, 1% resistors as shown in Figure 6.1. 2. Examine word 3 (channel 1 data) in the read block transfer file. Note the value. It should be around 1.00 (100 for 10 mohm resolution; 33 for 30 mohm resolution). 3. Examine word 9 of the write block transfer data file. Bits 16–10 make up the offset correction byte. Bit 17 is the sign bit. 4. Subtract the data value that you noted in step 2 from 100. The difference should be within +127 to –127.
6–8 Calibrating Your Module Table 6.A Value for Bits 7 through 0 Bit Value Bit 07 Sign bit Bit 06 = 0.0976562% Bit 05 = 0.0488281% Bit 04 = 0.024414% Bit 03 = 0.012207% Bit 02 = 0.00610351% Bit 01 = 0.00305175% Bit 00 = 0.00152587% You use the values that most nearly add up to the percentage that you determined in step 8. For example, to attain the value of 0.0597%, you need to add: Percentage Bit Number 0.0488281 Bit 05 0.00610351 Bit 02 0.00305175 Bit 01 0.
Chapter Chapter Objective Diagnostics Reported by the Module 7 We describe how to troubleshoot your module by observing LED indicators and by monitoring status bits reported to the processor.
7–2 Troubleshooting Table 7.A Troubleshooting Chart for the RTD Input Module (1771-IR/D) Indication Probable Cause Recommended Action Both LEDs are OFF No power to module Possible short on the module LED driver failure Check power to I/O chassis. Recycle as necessary. Replace module. Red FLT LED ON and Green RUN LED is ON Microprocessor, oscillator or EPROM failure Replace module. Red FLT LED ON If immediately after power-up, indicates RAM or EPROM failure.1 Replace module.
Troubleshooting 7–3 Word Bit Indication 2 00-05 Indicates that the default bias of 1000.0 has been subtracted from the measured value. If sending binary data, no overflow occurs unless there is a hardware malfunction. 06-07 Not used 10-15 Data sign bits formatted for BCD or signed magnitude. Bit 10 corresponds to channel 1, bit 11 to channel 2, and so on.
7–4 Troubleshooting
Appendix A Description Value Number of Inputs 6 RTD input channels Module Location 1771 I/O Chassis Sensor Type 100 ohm platinum (alpha = 0.00385) or 10 ohm copper (alpha = 0.00386) Other types may be used with report in ohms only Units of measure Temperature in oC Temperature in oF RTD resistance in ohms (10milliohms or 30milliohms resolution) Temperature Range Platinum: -200 to +870oC (-328 to 1598oF) Copper: -200 to +260oC (-328 to +500oF) Resistance Range 1.00 to 600.
A–2 Specifications Description Value Keying Between 10 and 12 Between 28 and 30 Field Wiring Arm Cat. No. 1771ĆWF Wiring Arm Screw Torque 7Ć9 poundĆinches Agency Certification (when product is marked) • • • • • Publications Publication 1771Ć5.63 Installation Instructions CSA certified CSA Class I, Division 2, Groups A, B, C, D certified UL listed CE marked for all applicable directives C-Tick marked for all applicable acts Table A.
Appendix Sample Programs for the RTD Input Module B The following are sample programs for entering data in the configuration words of the write block transfer instruction when using the PLC–2, PLC–3 or PLC–5 family processors. PLC-2 Family Processors To enter data in the configuration words, follow these steps. NOTE: For complete programming sample, refer to Figure 4.1.
B–2 Programming Examples Use the above procedure to enter the required words of the write block transfer instruction. Be aware that the block length will depend on the number of channels selected and whether biasing and/or calibration is or is not performed; for example, the block may contain only 1 word if no bias or calibration is performed but may contain 14 words if using 6 inputs with bias and calibration. The PLC–2 family write block transfer data file should look like Figure B.1. Figure B.
Programming Examples B–3 1. Press [SHIFT][MODE] to display your ladder diagram on the industrial terminal. 2. Press DD,03:0[ENTER] to display the block transfer write file. The industrial terminal screen should look like Figure B.2. Notice the highlighted block of zeroes. This highlighted block is the cursor. It should be in the same place as it appears in figure B.2. If it is not, you can move it to the desired position with the cursor control keys.
B–4 Programming Examples 2. Press [F8],[F5] and enter N7:60 to display the configuration block. The industrial terminal screen should like figure B.3. Figure B.
Appendix 4-Digit Binary Coded Decimal (BCD) C The 4–digit BCD format uses an arrangement of 16 binary digits to represent a 4–digit decimal number from 0000 to 9999 (figure C.1). The BCD format is used when the input values are to be displayed for operator viewing. Each group of four binary digits is used to represent a number from 0 to 9. The place values for each group of digits are 20, 21, 22 and 23 (NO TAG).
C–2 Data Table Formats Table C.A BCD Representation 23 (8) Signed-magnitude Binary Place Value 22 (4) 21 (2) Decimal Equivalent 20 (1) Signed–magnitude binary is a means of communicating numbers to your processsor. It should be used with the PLC–2 family when performing computations in the processor.
Data Table Formats Two's Complement Binary C–3 Two’s complement binary is used with PLC–3 processors when performing mathematical calculations internal to the processor. To complement a number means to change it to a negative number. For example, the following binary number is equal to decimal 22. 101102 = 2210 First, the two’s complement method places an extra bit (sign bit) in the left–most position, and lets this bit determine whether the number is positive or negative.
C–4 Data Table Formats
D Appendix Block Transfer (Mini-PLC-2 and PLC-2/20 Processors) Multiple GET Instructions - Mini-PLC-2 and PLC-2/20 Processors Programming multiple GET instructions is similar to block format instructions programmed for other PLC–2 family processors. The data table maps are identical, and the way information is addressed and stored in processor memory is the same. The only difference is in how you set up block transfer read instructions in your program.
D–2 Block Transfer (Mini–PLC–2 and PLC–2/20 Processors) Rungs 2 and 3: These output energize instructions (012/01 and 012/02) define the number of words to be transferred. This is accomplished by setting a binary bit pattern in the module’s output image table control byte. The binary bit pattern used (bits 01 and 02 energized) is equivalent to 6 words or channels, and is expressed as 110 in binary notation.
Block Transfer (Mini–PLC–2 and PLC–2/20 Processors) Setting the Block Length (Multiple GET Instructions only) D–3 The input module transfers a specific number of words in one block length. The number of words transferred is determined by the block length entered in the output image table control byte corresponding to the module’s address. The bits in the output image table control byte (bits 00 – 05) must be programmed to specify a binary value equal to the number of words to be transferred.
D–4 Block Transfer (Mini–PLC–2 and PLC–2/20 Processors)
Appendix E 2 and 4-Wire RTD Sensors About 2 and 4-Wire Sensors You can connect 2–wire and 4–wire sensors to the RTD module. Before we show you how to do this, let’s examine the differences between 2, 3 and 4–wire sensors. A 2–wire sensor is composed of just that; a sensor and 2 lead wires. Its schematic representation is shown below.
E–2 2 and 4–Wire RTD Sensors Three–wire and 4–wire sensors compensate for lead resistance error. Their schematic representation is shown below. The amount of error elimination depends upon the difference between the resistance values of the lead wires. The closer the resistance values are to each other, the greater the amount of error that is eliminated.
2 and 4–Wire RTD Sensors Connecting 4-Wire Sensors E–3 The illustration below shows how to connect 4–wire sensors to the field wiring arm of the RTD Input module. A 4–wire sensor has two pairs of leads; one pair for each resistor junction. One wire of the 4 is not used (it does not matter which one). This leaves 3 wires – one pair and one single wire. You must connect the single wire to the terminal marked ”A”. You connect the remaining pair of wires to terminals ”B” and ”C”.
E–4 2 and 4–Wire RTD Sensors
Appendix F Differences Between Series A RTD Modules and Series B. C and D RTD Input Modules Major Differences between Series The following is a list of major changes from Series A to Series B, C and D RTD Input Module (cat. no. 1771–IR). • The customer applied “10 ohm resistance value @ 0oC” is • • • • • • • now “10 ohm resistance value @ 25oC” with a range of 9.00 to 11.00 ohms. Calibration is now done automatically using the auto–calibration feature, or manually through programming.
F–2 Differences Between Series A RTD Modules and Series B. C and D RTD Input Modules • When displaying copper (10mohm/bit resolution) in ohms, the • • • • • • • • • • • • • resistance will be provided up to 327.67 ohms at which point an overrange will occur (overrange on the Series A was 20.72 ohms). Platinum (30mohm/bit resolution) will over range at 600.00 ohms but continue to measure until the input saturates (Series A was 399.99 ohms).
Differences Between Series A RTD Modules and Series B. C and D RTD Input Modules F–3 • The excitation current on Series B flows out of termination A. The excitation current on the series A flowed into termination A. Systems wired according to the IR User’s Manual will work without modification, presuming the transducer is polarity insensitive. • Allowable ambient temperature change to maintain accuracy is 1oC/min.
F–4 Differences Between Series A RTD Modules and Series B.
Appendix G CSA Hazardous Location Approval CSA Hazardous Location Approval Approbation d'utilisation dans des emplacements dangereux par la CSA CSA certifies products for general use as well as for use in hazardous locations. Actual CSA certification is indicated by the product label as shown below, and not by statements in any user documentation. La CSA certifie les produits d'utilisation générale aussi bien que ceux qui s'utilisent dans des emplacements dangereux.
G–2 CSA Hazardous Location Approval
Index A Accuracy, 2Ć3 auto-calibration gain, 7Ć3 offset, 7Ć2 performing, 7Ć2 saving calibration values, 7Ć5 B Bblock transfer read, BTR word assignments, 6Ć1 block transfer programming, 4Ć1 block transfer read, 6Ć1 bit/word assignments, 6Ć2 block transfer write, configuration block, 5Ć4 BTR word 9, 7Ć3 BTW word 15, 7Ć3 C cable length, maximum, 3Ć4 diagnostic indicators, 3Ć6 diagnostics indicators, 8Ć1 reported by module, 8Ć1 words reported, 8Ć2 differences, between series A and series B, FĆ1 E electros
I–2 Index programming using 6200 software, 5Ć1 with multiple GETs, DĆ1 sensors about 2 and 4-wire, EĆ1 connecting 4-wire, EĆ2 programming example PLC-2, 4Ć2 PLC-3, 4Ć4 PLC-5, 4Ć6 specifications, A-1 error summary, A-2 programs, sample PLC-2, BĆ1 PLC-3, BĆ3 PLC-5, BĆ4 real time sampling, 5Ć3 bit settings, 5Ć3 resistance, cable impedance, 3Ć4 RTD input module, features, 2Ć1 scan time, 4Ć7 Publication 1771Ć6.5.
AllenĆBradley Publication Problem Report If you find a problem with our documentation, please complete and return this form. Pub. Name Cat. No. RTD Input Module User Manual 1771-IR//D Check Problem(s) Type: Pub. No. 1771-6.5.129 Pub. Date March 2000 Part No.
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