Spectrum Controls 1771sc-IFE32 User Manual

Owner’s Guide 0300179-01 Rev . B

™

PLC-5
A

NALOG INPUT

Catalog Numbers
1771sc-IFE32

32 C

HANNEL

M

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

TM

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.

VV

ocabocab

ularular

ular

ularular

y:y:

y:

y:y:

V

ocab

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ocabocab

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

TM

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

3

I/O Chassis

Backplane

+

2

_

4

1

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: