Spectrum Controls 1771sc-IFE32 User Manual

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Owner’s Guide 0300179-01 Rev . B

™

PLC-5 A

NALOG INPUT

Catalog Numbers 1771sc-IFE32

32 C

HANNEL

ODULE

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. Therefore, the user and others responsible for applying the products and services described herein are responsible for determining their acceptability for each application. While efforts have been made to provide accurate information within this owner's guide, Spectrum Controls assumes no responsibility for the accuracy, completeness, or usefulness of the information herein.

Under no circumstances will Spectrum Controls be responsible or liable for any damages or losses, including indirect or consequential damages or losses, arising out of either the use of any information within this owner's guide or the use of any product or service referenced herein.

No patent liability is assumed by Spectrum Controls with respect to the use of any of the information, products, circuits, programming, or services referenced herein.

The information in this owner's guide is subject to change without notice.

Limited Warranty

Spectrum Controls warrants that its products are free from defects in material and workmanship under normal use and service, as described in Spectrum Controls literature covering this product, for a period of 1 year. The obligations of Spectrum Controls under this warranty are limited to replacing or repairing, at its option, at its factory or facility, any product which shall, in the applicable period after shipment, be returned to the Spectrum Controls facility, transportation charges prepaid, and which after examination is determined, to the satisfaction of Spectrum Controls, to be thus defective.

This warranty shall not apply to any such equipment which shall have been repaired or altered except by Spectrum Controls or which shall have been subject to misuse, neglect, or accident. In no case shall the liability of Spectrum Controls exceed the purchase price. The aforementioned provisions do not extend the original warranty period of any product which has either been repaired or replaced by Spectrum Controls.

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.

The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for example. Since there are many variables and requirements associated with any particular installation, Spectrum Controls does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.

Allen-Bradley publication SGI–1.1, “Safety Guidelines For The Application, Installa- tion and Maintenance of Solid State Control” (available from your local Allen-Bradley office) describes some important differences between solid-state equipment and electromechanical devices which should be taken into consideration when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Spectrum Controls, is prohibited.

Preface: Important User Information v

Preface

Throughout this manual we make notes to alert you to possible injury to people or damage to equipment under specific circumstances.

ATTENTION: Identifies information about practices or circumstances that can lead to

Attention helps you:

· identify a hazard

· avoid the hazard

· recognize the consequences

Important: Identifies information that is especially important for successful application and understanding of the product.

Important: We recommend you frequently backup your application programs on appropriate storage medium to avoid possible data loss.

personal injury or death, property damage, or economic loss.

vi PLC-5

32-Channel Analog Input Module

Using This Manual v

Using This Manual

Purpose of Manual:Purpose of Manual:

Purpose of Manual:

Purpose of 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:Audience:

Audience:

Audience:Audience:

Y ou 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. If you do not, refer to the appropriate programming and operations manual before you attempt to program this module.

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In this manual, we refer to:

· The analog input module as the “input module” or the “module”

· The programmable controller as the “controller”

Manual Organization:Manual Organization:

Manual Organization:

Manual Organization:Manual Organization:

This manual is divided into seven chapters. The following chart shows each chapter with its corresponding title and a brief overview of the topics covered in that chapter.

Chapter Title Topics Covered

1 Overview of Analog Input modules Description of module including general and

2 Installing the Module Module power requirements, keying, chassis

3 Module Programming Sample Programs 4 Configuring Your Module Hardware and Software Configuration Input range

5 Module Status and Input Data Reading Data from the Module Read block format 6 Calibrating Your Module Information on Calibrating your Module 7 Troubleshooting Your Module Troubleshooting guide for problem diagnosis

Appendix Title Topics Covered

A Specifications

Product CompatibilityProduct Compatibility

Product Compatibility

Product CompatibilityProduct Compatibility

hardware features

location. Wiring of the terminal block

Selection

The 1771-IFE 32 module can be used with any 1771 I/O chassis. Communication between the discrete analog module and the processor is bi-directional; the processor block-transfers output data through the output image table to the module and blocktransfers input data from the module through the input image table. The module also requires an area in the data table to store the read block transfer data and write block transfer data. I/O image table use is an important factor in module placement and addressing selection.

You can place your input module in any I/O module slot of the I/O chassis. You can put two input modules in the same module group. You can put an input and an output module in the same module group.

Do not put the module in the same module group as a discrete high-density module. Avoid placing analog input modules close to ac modules or high voltage dc modules.

vi PLC-5

32-Channel Analog Input Module

Related PublicationsRelated Publications

Related Publications

Related PublicationsRelated 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 ...........................................................................................................................................v

Chapter 1 Overview of the Analog Input Module ......................................................................................1

Module Description ...............................................................................................................................................................1

Features ................................................................................................................................................................................. 1

Program Selectable Input Ranges .......................................................................................................................................... 2

How Analog Modules Communicate with Programmable Controllers ...................................................................................2

Accuracy ...............................................................................................................................................................................3

Chapter Summary ................................................................................................................................................................... 3

Chapter 2 Installing the Input Module ........................................................................................................5

Power Requirements: ............................................................................................................................................................. 6

Locating the Module in the I/O Chassis ................................................................................................................................7

Key the Backplane Connector ...............................................................................................................................................7

Wiring Your Analog Module .................................................................................................................................................. 7

T o minimize ground-loop currents on input circuits: .............................................................................................................8

Cable Lengths ........................................................................................................................................................................8

Grounding ............................................................................................................................................................................11

Indicator Lights:................................................................................................................................................................... 11

Chapter Summary ................................................................................................................................................................. 12

Chapter 3 Module Programming ................................................................................................................13

Block Transfer Programming................................................................................................................................................ 13

Module Scan Time ............................................................................................................................................................... 15

Chapter Summary ................................................................................................................................................................. 15

Chapter 4 Configuring Your Module ..........................................................................................................17

Configuring your input module:........................................................................................................................................... 17

Block Transfer W rite (BTW) Maps ...................................................................................................................................... 17

Configuration W ord ............................................................................................................................................................. 18

Input Range Selection.......................................................................................................................................................... 18

Data Format: ......................................................................................................................................................................... 20

Digital Filtering:.................................................................................................................................................................... 20

Automatic System Calibration .............................................................................................................................................21

(Autocal) .............................................................................................................................................................................. 21

Debug Flags......................................................................................................................................................................... 21

Real Time Sampling: ............................................................................................................................................................. 23

Scale W ord Configuration Bits ............................................................................................................................................ 25

Default Configuration: .........................................................................................................................................................25

Chapter Summary ................................................................................................................................................................. 26

Chapter 5 Module Status and Input Data .................................................................................................27

Reading Data from Y our Module ......................................................................................................................................... 27

Block Transfer Read (BTR) Maps ........................................................................................................................................ 27

Module Data BTR ................................................................................................................................................................ 27

Module Data/Configuration Echo BTR................................................................................................................................ 28

Chapter 6 Troubleshooting Your Input Module .......................................................................................29

Diagnostics Reported by the Module.................................................................................................................................. 29

Diagnostic Bits Reported by the Analog input .................................................................................................................... 29

Checking Module Operation................................................................................................................................................ 31

Testing for Input.................................................................................................................................................................. 33

Channel Functionality.......................................................................................................................................................... 33

Chapter Summary ................................................................................................................................................................. 33

Appendix A ......................................................................................................................................................35

Electrical Specs .................................................................................................................................................................... 35

System Specifications .......................................................................................................................................................... 36

3.3 Environmental Specifications ......................................................................................................................................... 36

T erminal Block Pinouts ........................................................................................................................................................ 37

Declaration of Conformity .............................................................................................................................39

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 . Block transfer programming moves input data words from the module’s memory to a designated area in the processor data table in a single scan. It also moves configuration words from the processor data table to module memory.

The input module is a single-slot module and requires no external power supply . (If using passive transducers for input, the user must supply loop power.) After scanning the analog inputs, the input data is converted to a specified data type in a digital format to be transferred to the processor’s data table on request. The block transfer mode is disabled until this input scan is complete. Consequently , the minimum interval between block transfer reads is the same as the total input update time for each analog input module.

Chapter 1: Overview of the Analog Input Module 1

Chapter 1

Features

The Analog input module senses up to 32 single-ended or 16 differential analog inputs and converts them to a proportional four-digit BCD, 16 bit binary and 12 bit binary formats. Y ou can select from five voltage or three current input ranges.

Channels may be configured to acquire data as singled-ended inputs or as differential pairs. During differential acquisition, odd channels (1, 3, 5, etc.) are the positive input and the even channels (2, 4, 6, etc.) the negative inputs. A channel pair consists of two consecutive channels (1&2, 3&4, 5&6, etc.). Within a channel pair both channels must be specified as single acquisition or both as differential acquisition. Within a group of 8 consecutive channels, all 8 channels must be from either 8 voltage or 8 current sources. If part of a voltage group, a channel may be any of the allowed voltage ranges and if in a current group a channel may be any of the allowed current ranges as long as all 8 are either voltage ranges or all 8 are current ranges.

This module’s program selectable features include:

· 32 single-ended or 16 differential inputs

· User program selectable input ranges on a per channel basis (see table)

· Selectable real-time sampling

· Selectable scaling to engineering units

· Selectable digital filtering

· Selectable data format

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32-Channel Analog Input Module

Program Selectable Input Ranges

Valid acquisition types/ranges are listed below: Single Ended Ranges: Limits: Differential Ranges: Limits:

* = Default ** = Disabled. If this is the selected value, acquisition of this channel is disabled.

This can be used to improve throughput in modules where some channels are not used. NA = Not allowed.

How Analog Modules Communicate with Programmable Controllers

0* -10 to +10 V 8 -10 to +10 V 1 0 to +10 V 9 0 to +10 V 2 0 to +5 V 1 0 0 to +5 V 3 +1 to +5 V 11 +1 to +5 V 4 -5 to +5 V 12 -5 to +5 V 5 0 to +20 ma 1 3 NA 6 +4 to +20 ma 1 4 NA 7 -20 to +20 ma 1 5 **Disabled

The processor transfers data to the module (block transfer write) and from the module (block transfer read) using BTW and BTR instructions in your ladder diagram program. These instructions let the processor obtain input values and status from the module, and let you establish the module’s mode of operation.

1. The processor transfers your configuration data to the module via a block transfer write instruction.

2. External devices generate analog signals that are transmitted to the module

I/O Chassis

Backplane

5 6

Input Module 1771sc-IFE32

PC Processor

Accuracy

Chapter Summary

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. Y our 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. Y our ladder program should allow write block transfers to the module only when enabled by operator intervention or at power-up.

The accuracy of your input module is described in Appendix A.

In this chapter you read about the functional aspects of the input module and how the module communicates with the programmable controller .

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32-Channel Analog Input Module

Installing the Input Module

Chapter Objectives

Chapter 2: Installing the Input Module 5

Chapter 2

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 European Union and EEA regions. It has been designed and tested to meet the following directives.

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

Before Y ou Install Y our Input Module

This product is intended for use in an industrial environment.

Before installing your input module in the I/O chassis:

You need to: As described under:

Calculate the power requirements of all modules in the chassis. Power requirements, page…. Determine were to place the I/O module in the chassis Module locating in the I/O chassis, page…

Key the backplane connector to the I/O chassis Module Keying, page….

Make connections to the wiring arm Wiring your input module, page… and

grounding, page…

Important:

The 1771-IFE32 module is shipped from the factory set for voltage mode applications. Refer to “Setting the Configuration on the Module”on page 2–3 for other

combinations of current and voltage inputs.

Electrostatic Damage:

Electrostatic discharge can damage semiconductor devices inside this module if you touch backplane connector pins. Guard against electrostatic damage by observing the following precautions:

6 PLC-5

32-Channel Analog Input Module

• Wear an approved wrist strap grounding device, or touch a grounded object to rid yourself of

• Handle the module from the front, away from the backplane connector. Do not touch backplane

• Keep the module in its static-shield bag when not in use.

• Peripheral equipment must be suitable for the location in which it is used.

ATTENTION: Electrostatic discharge can degrade performance or cause permanent damage. Handle the module as stated below.

electrostatic charge before handling the module.

connector pins.

WARNING: Power, input and output (I/O) wiring must be in accordance with Class I, Division 2 wiring methods (Article 501-4(b) of the National Electrical Code, NFPA 70) and in accordance with the authority having jurisdiction.

Power Requirements:

WARNING – EXPLOSION HAZARD – SUBSTITUTION OF COMPONENTS MA Y IMP AIR SUIT ABLIITY FOR CLASS I, DIVISION 2

WARNING – EXPLOSION HAZARD – WHEN IN HAZARDOUS LOCA TIONS, TURN OFF POWER BEFORE REPLACING OR WIRING MODULES.

WARNING – EXPLOSION HAZARD – DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS

BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-HAZARDOUS.

THIS EQUIPMENT IS SUIT ABLE FOR USE IN CLASS I, DIVISION 2, GROUPS A, B, C, AND D OR

NON-HARZARDOUS LOCATIONS ONLY .

Y our module receives its power through the 1771 I/O power supply. The module requires a maximum of 400mA from the backplane.

Add this current to the requirements of all other modules in the I/O chassis to prevent overloading the chassis backplane and/or backplane power supply.

Locating the Module in the I/O Chassis

Key the Backplane Connector

Chapter 2: Installing the Input Module 7

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. W e 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.

Place your module in any slot in the chassis except the leftmost slot, which is reserved for processors or adapters.

ATTENTION: Observe the following precautions when inserting or removing keys:

· insert or remove keys with your fingers

· make sure that key placement is correct incorrect keying or the use of a tool can result in

damage to the backplane connector and possible system faults.

The 1771sc-IFE32 module is slitted at two places on the rear edge of the circuit board. These slots mate with plastic keying bands which mount on the backplane connector.

Position the keying bands in the backplane connector to correspond to the key slots.

Keying Bands

ATTENTION: Insert or remove keying bands with your fingers.

Upper Connector

Wiring Y our Analog Module

Connect your I/O devices to the cat. no. 1771-WG wiring arm shipped with the module. The wiring arm is attached to the pivot bar at the bottom of the I/O chassis. It pivots upward and connects with the module so you can install or remove the module without disconnecting the wires. You may also use a prewired swing arm, AllenBradley part number 1492-cable[1]WN.

8 PLC-5

32-Channel Analog Input Module

· Failure to remove power from the backplane or wiring arm could cause module damage,

· Failure to remove power from the backplane could cause injury or equipment damage due to

ATTENTION:

Remove power from the 1771 I/O chassis backplane and field-wiring arm before removing or installing an I/O module.

degradation of performance, or injury.

possible unexpected operation.

Place the module in the card guides on the top and bottom of the slot that guide the 1771sc-IFE32 module in position

To minimize ground-loop currents on input circuits:

Cable Lengths

· use differential mode

· use 2-wire transmitters with a common power supply

· separate 2-wire and 4-wire transmitters between different modules

· tie 4-wire transmitter and/or separate power supply grounds together

Important:

W e do not recommend mixing 2-wire and 4-wire transmitter inputs on the same module. Power supply placement can make it impossible to eliminate ground loops.

Recommended maximum cable length for voltage-mode input devices is 50 feet. This recommendation is based on considerations of signal degradation and electrical noise

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.

Connection Diagram for 32 Single-ended Inputs and Two-wire Transmitters

2-Wire Transmitter

Commons are tied in groups of four inside the module. Jumper all unused channels to appropriate group common to reduce noise. Tie power supply grounds together to minimize ground loops.

Attention: This signle includes any common mode voltage present between either input terminal and module common. If an input exceeds this range channel-to-channel cross talk can cause invalid input readings and invalid under or over range readings.

The sensor cable must be shielded. The shield must extend the length of the cable to the point of termination.

Power Supply

Source Ground

Connection Diagram for 32 Single-ended Inputs and Four-wire Transmitters

Channel 2

Channel 4

Channel 5

Channel 7

Common Group 1

Channel 10

Channel 12

Channel 13

Channel 15

Common Group 2

Channel 18

Channel 20

Channel 21

Channel 23

Common Group 3

Channel 26

Channel 28

Channel 29

Channel 31

Common Group 4

Channel 1

Channel 3

Common Group 1

Channel 6

Channel 8

Channel 9

Channel 11

Common Group 2

Channel 14

Channel 16

Channel 17

Channel 19

Common Group 3

Channel 22

Channel 24

Channel 25

Channel 27

Common Group 4

Channel 30

Channel 32

Power

4-Wire

Supply

Transmitter

4-Wire

Power

Transmitter

Supply

Commons are tied in groups of four inside the module. Jumper all unused channels to appropriate group common to reduce noise. Tie power supply grounds together to minimize ground loops.

The sensor cable must be shielded. The shield must extend the length of the cable to the point of termination.

Source Ground

Channel 2

Channel 4

Channel 5

Channel 7

Common Group 1

Channel 10

Channel 12

Channel 13

Channel 15

Common Group 2

Channel 18

Channel 20

Channel 21

Channel 23

Common Group 3

Channel 26

Channel 28

Channel 29

Channel 31

Common Group 4

Channel 1

Channel 3

Common Group 1

Channel 6

Channel 8

Channel 9

Channel 11

Common Group 2

Channel 14

Channel 16

Channel 17

Channel 19

Common Group 3

Channel 22

Channel 24

Channel 25

Channel 27

Common Group 4

Channel 30

Channel 32

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32-Channel Analog Input Module

Connection Diagram for 16 Differential Inputs and Two-wire Transmitters

2-Wire Transmitter

ll unsed inputs should have their + and - inputs tied together and to Commons to reduce noise. Tie power supply grounds together to minimize ground loops.

ttention: This signal must be between +14.5V and common voltage otherwise channel-to-channel cross talk can cause invalid input readings and invalid under or over range readings.

The sensor cable must be shielded. The shield must extend the length of the cable to the point of termination.

Power Supply

Source Ground

Connection Diagram for 16 Differential Inputs and Four-wire Transmitters

Input 1-

Input 2-

Input 3+

Input 4+

Common Group 1

Input 5-

Input 6-

Input 7+

Input 8+

Common Group 2

Input 9-

Input 10-

Input 11+

Input 12+

Common Group 3

Input 13-

Input 14-

Input 15+

Input 16+

Common Group 4

Input 1+

Input 2+

Input 3-

Input 4-

Common Group 1

Input 5+

Input 6+

Input 7-

Input 8-

Common Group 2

Input 9+

Input 10+

Input 11-

Input 12-

Common Group 3

Input 13+

Input 14+

Input 15-

Input 16-

Common Group 4

Input 1-

Input 2-

Power

4-Wire

Supply

Transmitter

4-Wire

Power

Transmitter

Supply

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.

Attention: This signal must be between +14.5V and common voltage otherwise channel-to-channel cross talk can cause invalid input readings and invalid under or over range readings.

The sensor cable must be shielded. The shield must extend the length of the cable to the point of termination.

Source Ground

Input 3+

Input 4+

Common Group 1

Input 5-

Input 6-

Input 7+

Input 8+

Common Group 2

Input 9-

Input 10-

Input 11+

Input 12+

Common Group 3

Input 13-

Input 14-

Input 15+

Input 16+

Common Group 4

Input 1+

Input 2+

Input 3-

Input 4-

Common Group 1

Input 5+

Input 6+

Input 7-

Input 8-

Common Group 2

Input 9+

Input 10+

Input 11-

Input 12-

Common Group 3

Input 13+

Input 14+

Input 15-

Input 16-

Common Group 4

Grounding

Chapter 2: Installing the Input Module 11

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. At the opposite end of the cable, tape exposed shield and drain wire with electrical tape to insulate it from electrical contact.

Indicator Lights:

Chapter Summary

The front panel of the analog input module contains a green RUN indicator and a red F AUL T indicator . At power-up an initial module self-check occurs. If there is no fault, the red indicator turns off.

The green indicator comes on when the module is powered. It will flash until the module is programmed. If a fault is found initially or occurs later, the red fault indicator lights. Possible module fault causes and corrective action is discussed in Chapter 6, Troubleshooting.

In this chapter you learned how to install your input module in an existing programmable controller system and how to wire the field swing arm.

12 PLC-5

32-Channel Analog Input Module

Module Programming

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Chapter 3: Module Programming 13

Chapter 3

Chapter Objectives:Chapter Objectives:

Chapter Objectives:

Chapter Objectives:Chapter Objectives:

In this chapter we describe:

· block transfer programming

· sample programs for PLC-5 processors

· module scan time issues

Y our module communicates with your processor through bi-directional block transfers. This is the sequential operation of both read and write block transfer instructions.

The block transfer write (BTW) instruction is initiated when the analog module is first powered up, and subsequently only when the programmer wants to write a new configuration to the module. At all other times the module is basically in a repetitive block transfer read (BTR) mode.

The application programs for the three processor families were written to accomplish this handshaking in the described manner . They are minimum programs; all the rungs and conditioning must be included in your application program. If you wish to disable BTRs for any reason, or add interlocks to the BTW rung to prevent writes from happening at certain times, you are allowed to do it. You may not eliminate any storage bits or interlocks that are included in our examples. If interlocks are removed, the program may not work properly .

The analog input module’s green LED will flash unit the module is programmed. The module will work with a default configuration of zeroes entered in all five words of a five word BTW configuration block. Upon writing zeros to the configuration

word the LED will stop blinking. See the configuration default section to understand what this configuration will look like. Also, refer to Appendix C for example configuration blocks and instruction addresses to get started.

14 PLC-5

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 Module Scan

Module Scan

Module Scan Module Scan

TimeTime

Time

TimeTime

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.” Write block transfers, therefore, should only be performed when the module is being configured or calibrated.

Any time after the second scan begins “6,” a BTR request “7” can be acknowledged. This interrupts the scan and the BTR empties the buffer . (If R TS is enabled, a BTR will only occur after the specified time period. Refer to chapter 4.)

Following the BTR, the input module inhibits block transfer communications with the programmable controller until it has scanned its inputs “8” and new data is ready ”9.” The input module repeats the scan sequence “10,” updating the input values until another block transfer request is received. Therefore, BTRs will only be completed as frequently as the total update time of the input module.

Chapter SummaryChapter Summary

Chapter Summary

Chapter SummaryChapter Summary

In this chapter, you learned to program your programmable controller . You were given a sample program for your PLC-5 processor.

16 PLC-5

32-Channel Analog Input Module

Configuring Y our Module

Configuring yourConfiguring your

Configuring your

Configuring yourConfiguring your input module:input module:

input module:

input module:input module:

Chapter 4

Chapter Objectives:Chapter Objectives:

Chapter Objectives:

Chapter Objectives:Chapter Objectives:

In this chapter, we describe;

· configuring your module’s features

· conditioning your inputs

· entering 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. Data is conditioned through a group of data table words that are transferred to the module using a block transfer write instruction.

The software configurable features available with the Analog Input Module (cat. no. 1771sc-IFE32 are:

· input range selection

· input type

· data format

· digital filtering

· real time sampling

· scaling to engineering units

BlocBloc

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(BTW) Maps

(BTW) Maps(BTW) Maps

er er

WriteWrite

Write

WriteWrite

T wo distinctly different block transfer writes (BTW) can be performed to configure the module. The first, BTW1, configures the module.

During normal operation the processor transfers 0 to 22 words to the module when you program a block transfer write instruction to the module’s address. This BTW file contains configuration words for each channel.

When user-define scaling is used a second BTW word is required and it’s length is 64 words.

BTW: N Words: Purpose: Required? BTW1 23 Module Configuration Required BTW2 64 User Scaling Optional

18 PLC-5

32-Channel Analog Input Module

Configuration Configuration

Configuration

Configuration Configuration

oror

The channel configuration word is described below: Input T ype/Range must be configured using Binary or Hexidecimal values.

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

0 Channel 4 Channel 3 Channel 2 Channel 1 *Type/Range 1 Channel 8 Channel 7 Channel 6 Channel 5 *Type/Range 2 Channel 12 Channel 11 Channel 10 Channel 9 *Type/Range 3 Channel 16 Channel 15 Channel 14 Channel 13 *Type/Range 4 Channel 20 Channel 19 Channel 18 Channel 17 *Type/Range 5 Channel 24 Channel 23 Channel 22 Channel 21 *Type/Range 6 Channel 28 Channel 27 Channel 26 Channel 25 *Type/Range 7 Channel 32 Channel 31 Channel 30 Channel 29 *Type/Range 8 Channel 4 Channel 3 Channel 2 Channel 1 Data Format

9 Channel 8 Channel 7 Channel 6 Channel 5 Data Format 10 Channel 12 Channel 11 Channel 10 Channel 9 Data Format 11 Channel 16 Channel 15 Channel 14 Channel 13 Data Format 12 Channel 20 Channel 19 Channel 18 Channel 17 Data Format 13 Channel 24 Channel 23 Channel 22 Channel 21 Data Format 14 Channel 28 Channel 27 Channel 26 Channel 25 Data Format 15 Channel 32 Channel 31 Channel 30 Channel 29 Data Format 16 Chan 8 Chan 7 Chan 6 Chan 5 Chan 4 Chan 3 Chan 2 Chan 1 Filter Freq 17 Chan 16 Chan 15 Chan 14 Chan 13 Chan 12 Chan 11 Chan 10 Chan 9 Filter Freq 18 Chan 24 Chan 23 Chan 22 Chan 21 Chan 20 Chan 19 Chan 18 Chan 17 Filter Freq 19 Chan 32 Chan 31 Chan 30 Chan 29 Chan 28 Chan 27 Chan 26 Chan 25 Filter Freq 20 Automatic Calibration Rate Autocal 21 Debug Flags Debug Flags 22 Real Time Sampling RTS

Input Range SelectionInput Range Selection

Input Range Selection

Input Range SelectionInput Range Selection

must be specified as single acquisition or both as differential acquisition.

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

0 Channel 4 Channel 3 Channel 2 Channel 1 *Type/Range

1 Channel 8 Channel 7 Channel 6 Channel 5 *Type/Range

2 Channel 12 Channel 11 Channel 10 Channel 9 *Type/Range

3 Channel 16 Channel 15 Channel 14 Channel 13 *Type/Range

4 Channel 20 Channel 19 Channel 18 Channel 17 *Type/Range

5 Channel 24 Channel 23 Channel 22 Channel 21 *Type/Range

6 Channel 28 Channel 27 Channel 26 Channel 25 *Type/Range

7 Channel 32 Channel 31 Channel 30 Channel 29 *Type/Range

Several input ranges for voltage and current are supported. Ranges that include both negative and positive values are referred to as bipolar ranges throughout this document. Ranges that include only positive values are referred to as unipolar.

Within a group of 8 consecutive channels, all 8 channels must be from either 8 voltage or 8 current sources. If part of a voltage group, a channel may be any of the allowed voltage ranges and if in a current group a channel may be any of the allowed current ranges as long as all 8 are either voltage ranges or all 8 are current

Chapter 4: Configuring Your Module 19

ranges.

Valid acquisition types/ranges are listed below:

Single Ended Ranges: Limits: Differential Ranges: Limits: 0* -10 to +10 V 8 -10 to +10 V 1 0 to +10 V 9 0 to +10 V 2 0 to +5 V 10 0 to +5 V 3 +1 to +5 V 11 +1 to +5 V 4 -5 to +5 V 12 -5 to +5 V 5 0 to +20 ma 13 NA 6 +4 to +20 ma 14 NA 7 -20 to +20 ma 15 **Disabled

*Default **Disabled – If this is the selected value, acquisition of this channel is disabled. This can be used to improve throughput in modules where some channels are not used. NA – Not allowed.

The table below shows the incremented voltage or current assigned to each bit for the seven different input ranges. For example, if the channel 1 input range is 0 to +5V and the actual incoming signal is at mid-range (+2.5V) the value in the module’s data word would be 0000 1000 0000 0000 (binary) or 2048 (decimal). The input is 2048/4096, or 1/2 of full scale. It is recommended that you use 16 bit signed integer data format to realize best module performance.

Input Signal: 16 Bit Signed: Raw Form Signed: 16 Bit Unsigned: Raw Form Unsigned:

-10 to +10 V -32,76810 to 32,767 0 to +10 V 010 to 32,767 0 to +5 V 010 to 32,767 +1 to +5 V 010 to 32,767

-5 to +5 V -32,76810 to 32,767 0 to +20 ma 010 to 32,767 +4 to +20 ma 010 to 32,767

-20 to +20 ma -32,76810 to 32,767

800116 to 7FFF 000016 to 7FFF 000016 to 7FFF 000016 to 7FFF 800116 to 7FFF 000016 to 7FFF 000016 to 7FFF 800116 to 7FFF

010 to 65,535 010 to 65,535 010 to 65,535 010 to 65,535 010 to 65,535 010 to 65,535 010 to 65,535 010 to 65,535

000016 to FFFF 000016 to FFFF 000016 to FFFF 000016 to FFFF 000016 to FFFF 000016 to FFFF 000016 to FFFF 000016 to FFFF

Input Signal: 12 Bit Signed: *Raw Form Signed: 12 Bit Unsigned: Raw Form Unsigned:

-10 to +10 V -409510 to +4095 0 to +10 V 0 to 4095 0 to +5 V 0 to 4095 +1 to +5 V 0 to 4095

-5 to +5 V -409510 to +4095 0 to +20 ma 0 to 4095 +4 to +20 ma 0 to 4095

-20 to +20 ma -409510 to +4095

1 0FFF16 to 0 0FFF 0 000016 to 0 0FFF 0 000016 to 0 0FFF 0 000016 to 0 0FFF 1 0FFF16 to 0 0FFF 0 000016 to 0 0FFF 0 000016 to 0 0FFF 1 0FFF16 to 0 0FFF

0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095

000016 to 0FFF 000016 to 0FFF 000016 to 0FFF 000016 to 0FFF 000016 to 0FFF 000016 to 0FFF 000016 to 0FFF 000016 to 0FFF

Input Signal: BCD Signed: *Raw Form Signed: BCD Unsigned: Raw Form Unsigned:

-10 to +10 V -4095 0 to +10 V 0 to 4095 0 to +5 V 0 to 4095 +1 to +5 V 0 to 4095

-5 to +5 V -4095 0 to +20 ma 0 to 4095 +4 to +20 ma 0 to 4095

-20 to +20 ma -4095

to +4095

BCD

to +4095

BCD

to +4095

BCD

1 409516 to 0 4095 0 000016 to 0 4095 0 000016 to 0 4095 0 000016 to 0 4095 1 409516 to 0 4095 0 000016 to 0 4095 0 000016 to 0 4095 1 409516 to 0 4095

0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095 0 to 4095

BCD

000016 to 4095 000016 to 4095 000016 to 4095 000016 to 4095 000016 to 4095 000016 to 4095 000016 to 4095 000016 to 4095

20 PLC-5

Data Format:Data Format:

Data Format:

Data Format:Data Format:

32-Channel Analog Input Module

Y ou must indicate what format will be used to read data from your module. T ypically, you select BCD with PLC-2 processors, and 2’s complement binary with PLC-3 and PLC-5 processors. Y ou use BTW words 8-15, bits 0-15 to set the data format.

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

8 Channel 4 Channel 3 Channel 2 Channel 1 Data Format

Data Format: Comment: Data Format: Comment: 0* Signed 16 bit 3 Unsigned 12 bit 1 Unsigned 16 bit 4 Signed BCD 2 Signed 12 bit 5 Unsigned BCD

6 through 15 NA

*Within a group of 8 channels (1..8, 9..16, 17..24, or 25..32) all 8 channels must be one of the valid voltage ranges or all 8 channels must be one of the valid current ranges. Mixing of voltage and current sources within a group of 8 is not allowed. Also, differential mode must be specified for two consecutive channels starting with an odd channel (1&2, 3&4, 5&6, etc).

Digital Filtering:Digital Filtering:

Digital Filtering:

Digital Filtering:Digital Filtering:

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

16 Chan 8 Chan 7 Chan 6 Chan 5 Chan 4 Chan 3 Chan 2 Chan 1 Filter Freq 17 Chan 16 Chan 15 Chan 14 Chan 13 Chan 12 Chan 11 Chan 10 Chan 9 Filter Freq 18 Chan 24 Chan 23 Chan 22 Chan 21 Chan 20 Chan 19 Chan 18 Chan 17 Filter Freq 19 Chan 32 Chan 31 Chan 30 Chan 29 Chan 28 Chan 27 Chan 26 Chan 25 Filter Freq

Filter: -3dB

0* 13.65 Hz 350Hz 49Hz (50/60Hz rejection) 1 7.8 Hz 200 Hz 20Hz 2+ 209.6 Hz 800 Hz NA 3 1667 Hz 6400 Hz NA

Input T ype/Range must be configured using Binary or Hexidecimal values. For example: Setting W ord 0 to BBBB hex sets channels 1-4 to a +1 to +5V input

range.

Output is scaled to the range limits if no other scaling is applied as follows:

The module has hardware-based high frequency filters on all channels to reduce the effect of electrical noise on the input signal. Software digital filtering is meant to reduce the effect of process noise on the input signal. Digital filtering is selected using BTW words 16-19, bits 0-15.

The onboard ADC data filters may be selected for the following filter frequencies:

Output Rate: -64.5dB Frequency:

Frequency:

*Default + Filtering is set for a 1msec response, which is 800Hz for the AD7731.

Chapter 4: Configuring Your Module 21

Channel Update times based on filter frequency are listed below .

Filter 1 Channel 16 Channels 32 Channels

7.8 Hz 120 ms 1920 ms 3840 ms

13.65 Hz 67.8 ms 1085 ms 2170 ms

209.6 Hz 5.4 ms 86.5 ms 173 ms 1667 Hz 2.1 ms 33.6 ms 67.2 ms

Automatic System CalibrationAutomatic System Calibration

Automatic System Calibration

Automatic System CalibrationAutomatic System Calibration (Autocal)(Autocal)

(Autocal)

(Autocal)(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. The exact time of system calibration can not be specified, only the rate at which is performed.

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

20 Automatic Calibration Rate Autocal

The table below illustrates the configuration options using Configuration Word 20.

AutoCal: Rate: 0* Once every 30 minutes. 1 Once an hour. 2 Once a day. 3 On command. 4 Once on power on/reset only.

* -Default

Flags Flags

Flags

Flags Flags

The user may specify the Block Transfer Read size using Configuration Word 21.

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

21 Debug Flags Debug Flags

Settings are as follows:

0 P U 1 = Power up complete 1 OR* 1 = Out of range error occurred 2 IS 1 = Invalid scaling detected 3 R T S 1 = Real time sampling BTR timeout 4 CS* 1 = Calibration status 5 E E 1 = EEPROM valid 6 HF 1 = Hardware fault 7 CE * 1 = Configuration Error

* Channel faults. Channels 1 – 32 (1 to 20hex) loaded in diagnostics data. If configuration error and 0 in diagnostics data, R TS or autocal values are invalid.

Power up complete

This bit is set when the power up test is complete, no hardware failures were detected, and the module is ready to start processing block transfer write requests and/

22 PLC-5

32-Channel Analog Input Module

Out of range error occurred

Invalid scaling detected

Real time sampling BTR timeout

Calibration Error

or block transfer read requests. It means that the module is alive but not yet configured. Cleared after a valid BTW for configuration.

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.).

This bit is set during normal run mode to indicate that at least one channels scaling is incorrectly defined. The diagnostic byte will be loaded with the channel ID of the last channel detected with this error (1=chan 1, 2=chan 2, etc.).

In the RTS mode a BTR request must be received within the time period defined for R TS. If not, this flag is set.

This bit is set while performing auto-calibrate. Does not clear if any calibration errors occur.

EEPROM Error

Hardware fault

Configuration Error

Channel Faults

Range Error Flags

Channel Data

At power up, the EEPROM is validated and the status is placed in this bit. If this bit is a ‘1’, the EEPROM is invalid.

If this bit is set a hardware fault was detected.

If this bit is set an error was found in the configuration data. The diagnostic byte will be loaded with the channel ID of the last channel detected with an error (1=chan 1, 2=chan 2, etc.). Otherwise, the diagnostic byte is zero.

32 channel fault flags are provided to indicate hardware failure on a per channel basis.

32 channel overflow and 32 channel underflow flags are provided to indicate when the input signal is out of range on a per channel basis. Out of range is defined as an input signal sensed as approximately at or over/under the selected range endpoints. These flags will be set at greater than +100% or less than -100% full scale data.

32 16 bit words are used to transfer data for all 32 channels to the PLC in a single block transfer.

Real Real

Time Sampling:Time Sampling:

Real

Time Sampling:

Real Real

Time Sampling:Time Sampling:

Intervals for use by the processor. In the RTS mode the module scans and updates its inputs at a user defined interval (DT). The module ignores block transfer read (BTR)

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 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

23 Real Time Sampling RTS

R TS 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 R TS mode the module scans and updates its inputs at a user defined time interval (T) instead of the default interval. The module ignores block transfer read (BTR) requests for data until the sample time period elapses. The BTR of a particular data set occurs only

once at the end of the sample period and subsequent requests for transferred data are ignored by the module until a new data set is available. If a BTR does not occur

before the end of the next RTS period, a time-out bit is set in the BTR status area. When set, this bit indicates that at least one data set was not transferred to the processor. (The actual number of data sets missed is unknown.) The time-out bit is reset at the completion of the BTR.

Set appropriate bits in the BTW data file to enable the RTS mode. You can select RTS periods ranging from 100 milliseconds (ms) to 3.1 seconds. Refer to the table below for actual bit settings. Note that the default mode of operation is implemented by placing all zeroes in bits 0–15.

The real time sampling (RTS) mode of operation provides data at a precisely gathered time interval. The R TS bit is defined in the diagnostics byte in the BTR map.

Bit settings for real time sample mode:

RTS: Sample Time: RTS: Sample Time: 0* Disabled 16 1.6 s 1 100 ms 17 1.7 s 2 200 ms 18 1.8 s 3 300 ms 19 1.9 s 4 400 ms 20 2.0 s 5 500 ms 21 2.1 s 6 600 ms 22 2.2 s 7 700 ms 23 2.3 s 8 800 ms 24 2.4 s 9 900 ms 25 2.5 s 10 1.0 s 26 2.6 s 11 1.1 s 27 2.7 s 12 1.2 s 28 2.8 s 13 1.3 s 29 2.9 s 14 1.4 s 30 3.0 s 15 1.5 s 31 3.1 s

Scaling:Scaling:

Scaling:

Scaling:Scaling:

The user may define Scaling to be applied to the input data by defining a 16 bit word value for the minimum full scale reading and a 16 bit word value for the maximum full scale reading. The module will apply linear equations to the values sampled such that values sampled at the range end points are represented as equivalent to the user defined min/max scaling for a given channel. If both the min and max scale values are

24 PLC-5

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. M = slope of line = (Y1 – Y0)/(X1 – X0)

Range: -10 to +10 V olts Min Scale: -1000 Max Scale: +1000

X0 = -1000 (min scale) Y0 = -10V (min range) X1 = +1000 (max scale) Y1 = +10V (max range) M = (10 – (-10))/(1000 – (-1000)) = 2000/20 = 0.01 B = Y – mX = 10 – (0.01 * 1000) = 10 – 10 = 0 If Y = 10 X = (Y – B)/m = ((10) – 0)/0.01 = 1000

Channel Voltage: Scaled Input Data:

-10V -1000

-5V -500 0V 0 +5V +500 +10V +1000

Scale values are defined using the same format as selected for their respective channels. If a channel group is configured for the BCD format, the scale values must be specified in BCD. If the group is configured for a binary format, the scale values must be specified in binary form.

Scale values may be defined using bipolar limits (e.g. -1000 to +1000) or unipolar limits (e.g. 0 to 1000) regardless of the input range specified.

If the signed 12 bit binary or signed BCD formats are selected, the min_scale/ max_scale values require special handling for negative values. The value to be entered in this case is abs(scale_value)+8000hex.

For example, if min_scale = -1000 and max_scale = 1000 and format is signed BCD: min_scale = -1000

= (abs(-1000

BCD

)) + 800016 = 100016 + 800016 = 9000

BCD

Chapter 4: Configuring Your Module 25

Scale Scale

Scale

Scale Scale

max_scale = 1000

BCD

= 1000

If scaling is defined properly the min scale value is less than the max scale value (scale

< scale

min

). If the min scale value is not less than the max scale value a

max

configuration fault is declared and scaling is not applied.

*If min = max = 0 then scaling is disabled. This is the default configuration.

oror

d Configuration Bitsd Configuration Bits

d Configuration Bits

oror

d Configuration Bitsd Configuration Bits

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group

0 Channel 1 Min Scale Min Scale 1 Channel 1 Max Scale Max Scale

62 Channel 32 Min Scale Min Scale 63 Channel 32 Max Scale Max Scale

If differential mode is used every other channel scale group is skipped. For example, when channel 1 is used in differential mode Scale Word 0 (Min Scale) and Word 1 (Max Scale) are used. W ord 2 and Word 3 are skipped. Word 4 and Word 5 are Min and Max Scale words for channel 2, etc.

Scaling: *Default: Min Scale Value (Binary) 0 Max Scale Value (Binary) 0

Important:

Default Configuration:Default Configuration:

Default Configuration:

Default Configuration:Default Configuration:

If scaling is selected for any channel, all channels must be scaled. If scaling is not required on certain channels, set those to the default input range: 0 to 4095 for 0 to + voltage or current ranges, and -4095 to +4095 for - to + voltage or current ranges.

If scaling is not selected, the module BTR file length will be 23.

Important: Use decimally addressed bit locations for PLC-5 processors. The module will return values outside the scaling range. For example, if a module is in

the 0–5V dc mode, scaled for 0 to 5000, and has –2V dc applied, it will return –2000.

If a write block of five words, with all zeroes, is sent to the Analog Input Module (cat. no. 1771sc-IFE32), default selections will be:

· 1 to 5V dc or 4 to 20mA (dependent on configuration jumper setting)

· BCD data format

· no real time sampling (R TS)

26 PLC-5

Chapter SummaryChapter Summary

Chapter Summary

Chapter SummaryChapter Summary

32-Channel Analog Input Module

· no filtering

· no scaling

· single-ended inputs

In this chapter you learned how to configure your module’s features, condition your inputs and enter your data

Module Status and Input Data

Chapter Objectives:Chapter Objectives:

Chapter Objectives:

Chapter Objectives:Chapter Objectives:

In this chapter, we describe:

· reading data from your module

· block transfer read block format

Reading Data frReading Data fr

Reading Data fr

Reading Data frReading Data fr

BlocBloc

k k

ransfransf

ransf

ransfransf

Bloc

BlocBloc

om om

our Moduleour Module

our Module

om om

our Moduleour Module

er Read (BTR) Mapser Read (BTR) Maps

er Read (BTR) Maps

er Read (BTR) Mapser Read (BTR) Maps

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.

Module input data is passed from the 1771sc-IFE32 to the PLC via a Block Transfer Read. T wo BTR formats are supported.

During normal operation, the processor transfers 41 words to the module when you program a BTR instruction to the module’s address. When user scaling and configuration echo are desired 64 words are transfered.

Chapter 5: Module Status and Input Data 27

Chapter 5

Purpose: 41 Module data only 64 Module data and configuration

The block memory maps are shown below:

Module Data BTRModule Data BTR

Module Data BTR

Module Data BTRModule Data BTR

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

0 Diagnostic Data Byte CE HF EE CS RT IS OR PU Diagnostics 1 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Channel Fault 2 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Channel Fault 3 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Under Range 4 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Under Range 5 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Over Range 5 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Over Range 7 16151413121110 9 8 7 6 5 4 3 2 1 Sign 8 32313029282726252423222120191817 Sign 9 Channel 1 Data Data

10 Channel 2 Data Data

...

40 Channel 32 Data Data

In differential mode every other channel is skipped. For example: W ord 9 = Channel 1, W ord 11 = Channel 2, Word 13 = Channel 3...

28 PLC-5

Module Data/Configuration Echo BTRModule Data/Configuration Echo BTR

Module Data/Configuration Echo BTR

Module Data/Configuration Echo BTRModule Data/Configuration Echo BTR

Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

32-Channel Analog Input Module

0 Diagnostic Data Byte CE HF EE CC RT IS OR PU Diagnostics 1 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Channel Fault 2 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Channel Fault 3 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Under Range 4 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Under Range 5 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 Over Range 5 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Over Range 7 16151413121110 9 8 7 6 5 4 3 2 1 Sign 8 3231302928272625 2423222120191817 Sign 9 Channel 1 Data Data

10 Channel 2 Data Data

40 Channel 32 Data Data 41 Channel 4 Channel 3 Channel 2 Channel 1 Type/Range 42 Channel 8 Channel 7 Channel 6 Channel 5 Type/Range 43 Channel 12 Channel 11 Channel 10 Channel 9 Type/Range 44 Channel 16 Channel 15 Channel 14 Channel 13 Type/Range 45 Channel 20 Channel 19 Channel 18 Channel 17 Type/Range 46 Channel 24 Channel 23 Channel 22 Channel 21 Type/Range 47 Channel 28 Channel 27 Channel 26 Channel 25 Type/Range 48 Channel 32 Channel 31 Channel 30 Channel 29 Type/Range 49 Channel 4 Channel 3 Channel 2 Channel 1 Data Format 50 Channel 8 Channel 7 Channel 6 Channel 5 Data Format 51 Channel 12 Channel 11 Channel 10 Channel 9 Data Format 52 Channel 16 Channel 15 Channel 14 Channel 13 Data Format 53 Channel 20 Channel 19 Channel 18 Channel 17 Data Format 54 Channel 24 Channel 23 Channel 22 Channel 21 Data Format 55 Channel 28 Channel 27 Channel 26 Channel 25 Data Format 56 Channel 32 Channel 31 Channel 30 Channel 29 Data Format 57 Chan 8 Chan 7 Chan 6 Chan 5 Chan 4 Chan 3 Chan 2 Chan 1 Filter Freq 58 Chan 16 Chan 15 Chan 14 Chan 13 Chan 12 Chan 11 Chan 10 Chan 9 Filter Freq 59 Chan 24 Chan 23 Chan 22 Chan 21 Chan 20 Chan 19 Chan 18 Chan 17 Filter Freq 60 Chan 32 Chan 31 Chan 30 Chan 29 Chan 28 Chan 27 Chan 26 Chan 25 Filter Freq 61 Automatic Calibration Rate Autocal 62 Debug Flags Debug Flags 63 Real Time Sampling RTS

Chapter Summary

In differential mode every other channel is skipped. For example: Word 9 = Channel 1, W ord 1 1 = Channel 2, W ord 13 = Channel 3... The status bits are paired. For example, Bit 0 and 1 in W ord 4 (Under Range) will be associated with Channel 0.

In this chapter you learned the meaning of the status information that the input module sends to the processor.

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.

· checking module operation

· checking for common mode voltages

· isolating a bad input

Diagnostics Reported by the Module

At power-up, the module momentarily turns on the red indicator as a lamp test, then checks for:

· correct RAM operation

· firmware errors

Thereafter, the module lights the green RUN indicator when operating without fault, or lights the red F AULT indicator when it detects fault conditions. The module also reports status and specific faults (if they occur) in every transfer of data (BTR) to the PC processor. Monitor the green and red indicators and status bits in word 1 of the BTR file when troubleshooting your module.

Chapter 6: Troubleshooting Your Input Module 29

Chapter 6

Diagnostic Bits Reported by the Analog input

Analog

(16 Bit)

Diagnostic bits in the read block transfer status words provide diagnostic capabilities.

Word 1 provides power-up and valid data status. Words 2 and 3 provide channel data status.

If a module on-board self-test fault occurs, block transfers will be inhibited, the red fault (FL T) will light, and the green run (RUN) light will go out.

Word 1

Diagnostics word 1 is the first data word in the read block transfer file for transfer to the central processor. It contains a power-up bit (bit 00) that is set (1) when the module is first powered up. It is reset (0) after a write block transfer . It also contains

30 PLC-5

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.

Bit 02 is set if an invalid digital filter value is entered (e.g., 1F). If an invalid digital filter value is entered, the module will not perform digital filtering.

The real time sample (R TS) fault bit (bit 03) is set if the module is configured for R TS and a block transfer read has not occurred within the user-programmed period.

Bit 04 is the calibration status bit. This bit is reset (0) when a successful calibration is completed. If the bit is set (1), an incorrect voltage/current was applied, or offset and gain calibrations were attempted together .

The EEPROM status bit (05) is set when an error occurs when saving calibration data to nonvolatile memory . If this bit is set at powerup, the EEPROM data did not pass checksum and calibration values are being used.

The hardware failure bit (06) is set when a blown fuse is detected or when the EEPROM can’t recover from a fault.

The configuration Error (07) is set when an error was found in the configuration data

Word 2

Word 2 provides for under-range conditions. When a particular channel input is under-range, the associated bit will be set. As long as inputs are under range, the associated bit remains set. Bit 00 corresponds to channel 1, bit 01 to channel 2, etc.

Word 3

Word 3 provides for over-range conditions. When a particular channel input is overrange, the associated bit will set. As long as inputs are in range, the associated bit remains reset. Bit 00 corresponds to channel 1, bit 01 to channel 2, etc.

Word 4

W ord 4 provides an indication of a particular channel’s input polarity (set or 1 = negative; reset or 0 = positive). Bit 00 corresponds to channel 1, bit 01 to channel 2, etc.

The following table lists the probable cause and recommended actions for some common trouble indications

Checking Module Operation

Chapter 6: Troubleshooting Your Input Module 31

The following allows you to run a check on module operation, and isolate a fault either to the module or external to the module.

(16 Bit)

32 PLC-5

!!!

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 +14.25V, remove that channel’s input wiring and observe the affect on the input data table of the programmable controller .

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.

• Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation.

If no other common mode voltages are present, the input data for all other channels should stabilize to some predictable value.

5. Attempt to equalize all grounds at the offending channel beforereconnecting the

input wiring.

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.

• Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation.

6. If the common mode voltage cannot be removed on the input, an isolation device

may be required on that channel.

Disconnecting inputs from the field wiring arm one at a time while observing module action.

During this procedure, monitor the input data table of the programmable controller and observe any changes which occur.

1. Make sure the field wiring arm is in position on the module.

2. Apply power to the 1771 I/O chassis.

3. While observing the input data table, remove one input at a time.

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.

• Failure to remove power from the backplane could cause injury or equipment damage due to possible unexpected operation.

4. When the offending input channel is disconnected, the input data table will stabilize to some predictable values.

T esting for Input

Channel Functionality

Chapter 6: Troubleshooting Your Input Module 33

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.

• Failure to remove power from the backplane could cause injury or equipment

damage due to possible unexpected operation.

2. Connect a battery (or other voltage source) across the input terminals. When the

4-20mA range is selected, the voltage source must not exceed 1-5V .

ATTENTION: The voltage source must be within the selected voltage range. If the source voltage is greater than the selected voltage range of the input, module damage will result.

3. Monitor the input data table for predictable values. (values relative to the input

source voltage).

Chapter Summary

In this chapter you learned how to interpret the indicator lights, and troubleshoot your input module.

34 PLC-5

32-Channel Analog Input Module

Appendix A: Specifications 35

Electrical SpecsElectrical Specs

Electrical Specs

Electrical SpecsElectrical 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 overvoltage protection Voltage Ranges:

Current Ranges: ±20 mA

Common Mode Voltage ±15 Volts Input impedance Voltage Mode: 10 MegaOhms, min; Current Mode: 250 Ohms.

Common mode rejection 90 dB minimum at 50 or 60 Hz (frequency dependent) Unscaled BCD and binary output to processor 0 to 65,535 for unipolar ranges (0 to 5V, 0 to 20mA, etc)

-32,768 to +32,767 for bipolar ranges (±10V, ±20mA, etc)

±20 Volts

Appendix A

Engineering units sent to processor ±9999 with selectable scaling

Accuracy

Voltage Typ .03% of full scale typical @ 25°C. Voltage Max .05% of full scale Maximum @ 60°C.

Note: Accuracy is dependent on the filter frequency selection, range selection, data format, and input noise.

Voltage Repeatability .03% of full scale Maximum @ 60°C. Current Typ .05% of full scale typical @ 25°C. Current Max .10% of full scale Maximum @ 60°C.

Note: Accuracy is dependent on the filter frequency selection, range selection, data format, and input noise.

Current Repeatability .05% of full scale Maximum @ 60°C. Temp. coefficient 490ms real time auto calibration. Calibration for temp. compensation.

Display format BCD, Two’s complement, or signed magnitude; scaled or unscaled. Input Filter 7.8Hz, 13.65Hz, 209.6Hz, 1667KHz

Channel Update Time See Channel Update Time chart vs filter selection Single Channel Min 2.1ms 1667Hz filter, no cal Single Channel Max 120ms 7.8Hz filter, no cal 32 Channel Min 67.2ms 1667Hz filter, no cal 32 Channel Max 3840ms 7.8Hz filter, no cal

Isolation

Channel to Rack 500 VAC Continuous Optical & magnetic Channel to Channel 12.5V Group to Group +-15V

Input Protection ±20VDC continuous, 1500W pulsed for 1msec.

Power Requirements

Internal rack +5v 500mA – Maximum / 400mA T ypical External None Fusing None – External Customer option.

Digital Notch Filter, Programmable in groups of 8 inputs.

Max Input current voltage or Current mode = ±50mA

36 PLC-5

System SpecificationsSystem Specifications

System Specifications

System SpecificationsSystem Specifications

Specification Description Data Registers Block Transfer Write (BTW) 25 words.

LED Indicators 1 Green Led labeled “RUN”

Terminal Block Standard 1771 40 Pin Connector Wire Size 1-14AWG, or 2-16AWG wires Interface 1771 “T” Module Interface Controller (TIC) A-B P/N 943129-61

Compatibility

Hardware 1771-A1B through –A4B or later I/O chassis only. Software 6300 Programming Software, APS, RS Logix Dimensions Single 1771 slot, Standard Metal Enclosure and Separate Terminal Block. Weight 0.90Kg

3.3 En3.3 En

3.3 En

3.3 En3.3 En

Test Description Test Standard Mechanical

Vibration of Unpackaged Products ICCG-ES #001 Rev A. Shock of Unpackaged Products ICCG-ES #002 Rev A. Vibration of Packaged Products ICCG-ES #003 Rev A. Shock of Packaged Product ICCG-ES #004 Rev A.

32-Channel Analog Input Module

virvir

onmental Specificationsonmental Specifications

vir

onmental Specifications

virvir

onmental Specificationsonmental Specifications

Block Transfer Write (BTR) 41 words.

1 Red Led labeled “FAULT”

Temperature / Humidity

Operating Temperature ICCG-ES #006 Rev C. Storage Temperature ICCG-ES #006 Rev C. Humidity-T emperature ICCG-ES #008 Rev B.

Electrical

EN50082-2

Electrostatic Discharge (IEC 801-2) ICCG-ES #005 Rev A./EN 61000-4-2 Level B RF Electromagnetic Field Susceptibility (IEC 801-3) ICCG-ES #011 Rev A./ENV 50140 Level A RF Immunity to 900MHz ICCG-ES #01 1 Rev A./ENV 50204 Fast/Burst Transient (IEC 801-4) ICCG-ES #020 Rev A./ENV 61000-4-4 Level B RF Common Mode Immunity (IEC 801-6) ICCG-ES #022 Rev A./ENV 50141 Level A, Injected

EN50081-2

Conducted Emissions (CISPR 11) class A ICCG-ES #017 Rev A./ENV 55011, Group 1 Class A Radiated Electromagnetic Emissions (CISPR 11) class A ICCG-ES #021 Rev A./ENV 55011, Group 1 Class A

erminal Blocerminal Bloc

erminal Bloc

erminal Blocerminal Bloc

k Pinoutsk Pinouts

k Pinouts

k Pinoutsk Pinouts

Appendix A: Specifications 37

The modules terminal block will use Allen-Bradley’s standard 40 pin input connector (Cat. No. 1771-WN).

Single Ended Input Single Ended Input

Single Ended Input

Single Ended Input Single Ended Input

WiringWiring

Wiring

WiringWiring

Connection Diagram for 32 Single-ended Inputs

Channel 2

Channel 4

Channel 5

Channel 7

Common Group 1

Channel 10

Channel 12

Channel 13

Channel 15

Common Group 2

Channel 18

Channel 20

Channel 21

Channel 23

Common Group 3

Channel 26

Channel 28

Channel 29

Channel 31

Common Group 4

Channel 1

Channel 3

Common Group 1

Channel 6

Channel 8

Channel 9

Channel 11

Common Group 2

Channel 14

Channel 16

Channel 17

Channel 19

Common Group 3

Channel 22

Channel 24

Channel 25

Channel 27

Common Group 4

Channel 30

Channel 32

38 PLC-5

DiffDiff

erential Input erential Input

Diff

erential Input

DiffDiff

erential Input erential Input

32-Channel Analog Input Module

WiringWiring

Wiring

WiringWiring

Getting Technical Assistance

Declaration of Conformity

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. In the unlikely event that the

module should need to be returned to Spectrum Controls, please ensure that the unit is enclosed in approved ESD packaging (such as static-shielding / metallized bag or black conductive container).

Spectrum Controls reserves the right to void the warranty on any unit that is improperly packaged for shipment.

For further information or assistance, please contact your local distributor, or call the Spectrum Controls Customer Satisfaction department at (425) 746-9481 from 8:00 A.M. to 5:00 P.M. Pacific Time.

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.com

Spectrum Controls 1771sc-IFE32 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual