Owner’s Guide 0300179-01 Rev.
Important Notes 1. Please read all the information in this owner’s guide before installing the product. 2. The information in this owner's guide applies to hardware and firmware version 1.0 or later. 3. This guide assumes that the reader has a full working knowledge of the relevant processor. Notice The products and services described in this owner's guide are useful in a wide variety of applications.
Preface: Important User Information v Preface Important User Information Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards.
vi PLC-5TM 32-Channel Analog Input Module
Using This Manual v Using This Manual Purpose of Manual: This manual shows you how to use your Analog 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 to make efficient use of your input module. In particular, you must know how to program block transfers. We assume that you know how to do this in this manual.
vi PLC-5TM 32-Channel Analog Input Module Related Publications For a list of publications with information on Allen-Bradley programmable controller products, consult our publication index (SD499).
Contents Preface ................................................................................................................................................................ v Important User Information ............................................................................................................................ v Using This Manual ...........................................................................................................................................
Chapter 6 Troubleshooting Your Input Module .......................................................................................29 Diagnostics Reported by the Module .................................................................................................................................. 29 Diagnostic Bits Reported by the Analog input .................................................................................................................... 29 Checking Module Operation ..................
Chapter 1: Overview of the Analog Input Module 1 Chapter 1 Overview of the Analog Input Module Chapter Objectives This chapter, we describe: · features of the module · how the module communicates with programmable controllers Module Description The analog input module is an intelligent block transfer module that interfaces analog input signals with any Allen-Bradley programmable controllers that have block transfer capability.
2 PLC-5TM 32-Channel Analog Input Module Program Selectable Input Ranges Valid acquisition types/ranges are listed below: Single Ended Ranges: Limits: Differential Ranges: 0* 1 2 3 4 5 6 7 * = Default -10 to +10 V 0 to +10 V 0 to +5 V +1 to +5 V -5 to +5 V 0 to +20 ma +4 to +20 ma -20 to +20 ma 8 9 10 11 12 13 14 15 Limits: -10 to +10 V 0 to +10 V 0 to +5 V +1 to +5 V -5 to +5 V NA NA **Disabled ** = Disabled. If this is the selected value, acquisition of this channel is disabled.
Chapter 1: Overview of the Analog Input Module 3 3. The module converts analog signals into binary or BCD format, and stores these values until the processor requests their transfer. 4. When instructed by your ladder program, the processor performs a read block transfer of the values and stores them in a data table. 5. The processor and module determine that the transfer was made without error, and that input values are within specified range. 6.
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Chapter 2: Installing the Input Module 5 Chapter 2 Installing the Input Module Chapter Objectives In this chapter, we tell you about: · calculating the chassis power requirement · choosing the module’s location in the I/O chassis · configuring your module configuration plugs · keying a chassis slot for your module · installing the input module · wiring the input module’s field wiring arm Compliance to European Union Directives If this product has the CE mark it is approved for installation within the Euro
6 PLC-5TM 32-Channel Analog Input Module ! ATTENTION: Electrostatic discharge can degrade performance or cause permanent damage. Handle the module as stated below. • Wear an approved wrist strap grounding device, or touch a grounded object to rid yourself of electrostatic charge before handling the module. • Handle the module from the front, away from the backplane connector. Do not touch backplane connector pins. • Keep the module in its static-shield bag when not in use.
Chapter 2: Installing the Input Module 7 Locating the Module in the I/O Chassis Place your module in any I/O module slot of the I/O chassis except for the extreme left slot. This slot is reserved for PC processors or adapter modules. 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.
8 PLC-5TM 32-Channel Analog Input Module ! ATTENTION: Remove power from the 1771 I/O chassis backplane and field-wiring arm before removing or installing an I/O module. · Failure to remove power from the backplane or wiring arm could cause module damage, degradation of performance, or injury. · Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation.
Chapter 2: Installing the Input Module 9 immunity in typical industrial environments. Cable length for current-mode input devices need not be as restrictive because analog signals from these devices are less sensitive to electrical noise interference. Input connections for the 1771sc-IFE32 module with single-ended and differntial inputs are shown in the following figures.
10 PLC-5TM 32-Channel Analog Input Module Connection Diagram for 16 Differential Inputs and Two-wire Transmitters Input 12-Wire Transmitter + + Power Supply Input 2- - Input 3+ Input 4+ Common Group 1 - 2-Wire Transmitter + + Power Supply Input 5Input 6Input 7+ Input 8+ Common Group 2 Input 9- Source Ground All unsed inputs should have their + and - inputs tied together and to Commons to reduce noise. Tie power supply grounds together to minimize ground loops.
Chapter 2: Installing the Input Module 11 Grounding When using shielded cable wire, ground the foil shield and drain wire only at one end of the cable. We recommend that you wrap the foil shield and drain wire together, and connect them to a chassis mounting bolt, grounding stud or chassis single-point grounding point (Figure 2.5). Use heat shrink tubing to seal the exit point of the wires.
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Chapter 3: Module Programming 13 Chapter 3 Module Programming Chapter Objectives: In this chapter we describe: · block transfer programming · sample programs for PLC-5 processors · module scan time issues Bloc k Transf er Pr ogramming ransfer Programming Block Your module communicates with your processor through bi-directional block transfers. This is the sequential operation of both read and write block transfer instructions.
14 PLC-5TM 32-Channel Analog Input Module PLC-5 Programming: The PLC-5 program is very straight forward with the following exceptions: 1. You must use enable bits instead of done bits as the conditions on each rung. 2. A separate control file must be selected for each of the block transfer instructions.
Chapter 3: Module Programming 15 Module Scan Time Update 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 Appendix A. Following a block transfer write “1” the module inhibits communication until after it has configured the data “2,” performed calibration check “3” (if requested), scanned the inputs “4,” and filled the data buffer “5.
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Chapter 4 Configuring Your Module Chapter Objectives: In this chapter, we describe; · configuring your module’s features · conditioning your inputs · entering your data. Configuring your input module: 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.
18 PLC-5TM 32-Channel Analog Input Module Configuration Wor d ord The channel configuration word is described below: Input Type/Range must be configured using Binary or Hexidecimal values.
Chapter 4: Configuring Your Module 19 ranges. Valid acquisition types/ranges are listed below: Single Ended Ranges: 0* 1 2 3 4 5 6 7 Limits: -10 to +10 V 0 to +10 V 0 to +5 V +1 to +5 V -5 to +5 V 0 to +20 ma +4 to +20 ma -20 to +20 ma Differential Ranges: 8 9 10 11 12 13 14 15 Limits: -10 to +10 V 0 to +10 V 0 to +5 V +1 to +5 V -5 to +5 V NA NA **Disabled *Default **Disabled – If this is the selected value, acquisition of this channel is disabled.
20 PLC-5TM 32-Channel Analog Input Module Data Format: You must indicate what format will be used to read data from your module. Typically, you select BCD with PLC-2 processors, and 2’s complement binary with PLC-3 and PLC-5 processors. You use BTW words 8-15, bits 0-15 to set the data format.
Chapter 4: Configuring Your Module 21 Channel Update times based on filter frequency are listed below. Filter 7.8 Hz 13.65 Hz 209.6 Hz 1667 Hz 1 Channel 120 ms 67.8 ms 5.4 ms 2.1 ms 16 Channels 1920 ms 1085 ms 86.5 ms 33.6 ms 32 Channels 3840 ms 2170 ms 173 ms 67.2 ms Automatic System Calibration (Autocal) The built in capability of the Analog to Digital Converter to perform system calibrations may be performed at a rate defined by the user.
22 PLC-5TM 32-Channel Analog Input Module or block transfer read requests. It means that the module is alive but not yet configured. Cleared after a valid BTW for configuration. Out of range error occurred This bit is set during normal run mode to indicate that at least one channel is out of range. The diagnostic byte will be loaded with the channel ID of the last channel detected as out-of-range (1=chan 1, 2=chan 2, etc.).
Chapter 4: Configuring Your Module 23 requests for data until the sample time period elapses. If the sample period elapses and no BTR requests have occurred since the interval started, the RTS bit is flagged indicating an RTS synchronization error. Word/Bit 23 15 14 13 12 11 10 09 08 07 06 Real Time Sampling 05 04 03 02 01 00 Group RTS RTS is invaluable for time based functions (such as PID and totalization) in the PLC.
24 PLC-5TM 32-Channel Analog Input Module set to zero (default), no user scaling is performed. The slope line represented the module response may be defined from any two points on the line defined as (X0, Y0) and (X1, Y1). The X axis is assumed to be the scaled data value and the Y axis is the ADC output representing the channel input. The following is an example: Y= voltage +10V X = scale value Y = mX + B Y = value at Y axis X = value at X axis B = Y intercept when X = 0.
Chapter 4: Configuring Your Module 25 max_scale = 1000BCD = 100016 If scaling is defined properly the min scale value is less than the max scale value (scalemin < scalemax). If the min scale value is not less than the max scale value a configuration fault is declared and scaling is not applied. *If min = max = 0 then scaling is disabled. This is the default configuration.
26 PLC-5TM 32-Channel Analog Input Module · no filtering · no scaling · single-ended inputs Chapter Summary In this chapter you learned how to configure your module’s features, condition your inputs and enter your data
Chapter 5: Module Status and Input Data 27 Chapter 5 Module Status and Input Data Chapter Objectives: In this chapter, we describe: · reading data from your module · block transfer read block format om Your Module Reading Data fr from Block transfer read programming moves status and data from the input module to the processor’s data table in one I/O scan (Figure 5.1). The processor’s user program initiates the request to transfer data from the input module to the processor.
28 PLC-5TM 32-Channel Analog Input Module Module Data/Configuration Echo BTR Word/Bit 0 1 2 3 4 5 5 7 8 9 10 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 15 14 16 32 16 32 16 32 16 32 15 31 15 31 15 31 15 31 13 12 Diagnostic 14 13 30 29 14 13 30 29 14 13 30 29 14 13 30 29 Channel 4 Channel 8 Channel 12 Channel 16 Channel 20 Channel 24 Channel 28 Channel 32 Channel 4 Channel 8 Channel 12 Channel 16 Channel 20 Channel 24 Channel 28 Channel 32 Chan 8 Chan 7 Chan 16 Chan 15 C
Chapter 6: Troubleshooting Your Input Module 29 Chapter 6 Troubleshooting Your Input Module Chapter Objective: In this chapter, we describe how to troubleshoot your module by: · observing the indicators · monitoring status bits reported to the processor.
30 PLC-5TM 32-Channel Analog Input Module an under-range or over-range bit (bit 01) that is set when any input is under or overrange. An invalid scaling data bit (bit 02) is set if invalid scaling data is entered into any of the minimum/maximum scaling value words. Note that minimum equal to maximum is an invalid value. If invalid values are entered into the minimum or maximum scaling words the corresponding read block transfer input channel word will be set to 0000.
Chapter 6: Troubleshooting Your Input Module Checking Module Operation The following allows you to run a check on module operation, and isolate a fault either to the module or external to the module.
32 PLC-5TM 32-Channel Analog Input Module 1. Make sure the field wiring arm is in position on the module. 2. Apply power to the 1771 I/O chassis. 3. Check each input (either single-ended or differential) for common mode voltages exceeding +14.25V with respect to module common. A. Hold the positive probe of the voltmeter on the first input terminal. B. Hold the negative probe of the voltmeter on a module common terminal (terminals 20 or 21). 4. If any voltage is seen that exceeds +14.
Chapter 6: Troubleshooting Your Input Module 33 Testing for Input Channel Functionality To test the functionality of an input channel: 1. Remove the input wiring from the field wiring arm. ! ATTENTION: Remove power from the 1771 I/O chassis backplane and field wiring arm before removing or installing input wiring. • • Failure to remove power from the backplane or wiring arm could cause module damage, degradation of performance, or injury.
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Appendix A: Specifications 35 Appendix A Electrical Specs Specification Description Inputs per module 32 single-ended; 16 differential low level Module location 17710 I/O chassis – 1 slot Nominal input voltage +1 to +5 Vdc, 0 to 5 Vdc, -5 to +5 Vdc, -10 to +10 Vdc, 0 to 10 Vdc Nominal input current +4 to +20 mA, 0 to +20 mA, -20 to +20 mA Resolution 16 bit binary, 15 bit plus sign in bipolar ranges Linearity ±1 LSB Isolation voltage Channel to back Plane Isolation of 500VDC Input overvolta
36 PLC-5TM 32-Channel Analog Input Module System Specifications Specification Description Data Registers Block Transfer Write (BTW) 25 words. Block Transfer Write (BTR) 41 words. LED Indicators 1 Green Led labeled “RUN” 1 Red Led labeled “FAULT” Terminal Block Standard 1771 40 Pin Connector Wire Size Interface 1-14AWG, or 2-16AWG wires 1771 “T” Module Interface Controller (TIC) A-B P/N 943129-61 Compatibility Hardware 1771-A1B through –A4B or later I/O chassis only.
Appendix A: Specifications 37 Terminal Bloc k Pinouts Block The modules terminal block will use Allen-Bradley’s standard 40 pin input connector (Cat. No. 1771-WN).
38 PLC-5TM 32-Channel Analog Input Module Diff erential Input Wiring Differential
Getting Technical Assistance If you need technical assistance, please review the information in Chapter 6, “Testing Your Module,” before calling your local distributor of Spectrum Controls. Note that your module contains electronic components which are susceptible to damage from electrostatic discharge (ESD). An electrostatic charge can accumulate on the surface of ordinary plastic wrapping or cushioning material.
The ENCOMPASS logo and PLC-5 are trademarks of Allen-Bradley Company, Inc. Copyright © 2000, Spectrum Controls, Inc. All rights reserved. Printed in U.S.A. Specifications subject to change without notice. Publication 0300179-01 Rev. B March 22, 2001. Corporate Headquarters Spectrum Controls Inc. P.O. Box 5533 Bellevue, WA 98006 Fax: (425) 641-9473 Tel: (425) 746-9481 Web Site: http://www.spectrumcontrols.com E-mail: spectrum@spectrumcontrols.
