Spectrum Controls 1756sc-IF8u User Manual

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Owner’s Guide 0300191-04 Rev . A

ONTROL

NIVERSAL

Catalog Number: 1756sc-IF8u

OGIX

NALOG INPUT

™

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 version A and firmware version 2.0 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.

Who Should Use This Guide

Preface

Read this preface to familiarize yourself with the rest of the owner’s guide. This preface covers:

• who should use this guide

• what this guide covers

• related Allen-Bradley documents

• terms & abbreviations you should know

Use this guide if you design, install, program, or maintain a control system that uses Allen-Bradley ControlLogix Controllers.

Y ou should have a basic understanding of ControlLogix products. Y ou should also understand electronic process control and the ladder program instructions required to generate the electronic signals that control your application. If you do not, contact your local Allen-Bradley representative for the proper training before using these products.

What This Guide Covers

Related AllenBradley Documents

This guide covers the 1756sc-IF8u universal analog input module. It contains the information you need to install, wire, use, and maintain these modules. It also provides diagnostic and troubleshooting help should the need arise.

T able A lists several Allen-Bradley documents that may help you as you use these products.

Table A. Related Allen-Bradley documents

Allen-Bradley Doc. No. Title Publication Number

1756-P A72, ControlLogix Power Supply Installation

-PB72 Instructions 1756-5.1

1756-A4, ControlLogix Chassis Installation Instructions 1756-5.2

-A7, -A10,

-A13, -A17

vi ControlLogix™ Universal Analog Input Modules

1756 Series ControlLogix Module Installation Instructions (Each module has separate document for installation) 1756-5.5,

1756-L1, Logix5550 Controller User Manual 1756-6.5.12

-L1M1, -L1M2

1756-DHRIO ControlLogix Data Highway Plus Communication Interface Module User Manual 1756-6.5.2

1756-ENET ControlLogix Ethernet Communication Interface Module User Manual 1756-6.5.1

T o obtain a copy of any of the Allen-Bradley documents listed, contact your local Allen-Bradley office or distributor .

Terms & Abbreviations You Should Know

Y ou should understand the following terms and abbreviations before using this guide.

-5.42

A/D - Refers to analog-to-digital conversion. The conversion produces a digital value whose magnitude is proportional to the instantaneous magnitude of an analog input signal.

Attenuation – The reduction in magnitude of a signal as it passes through a system. The opposite of gain.

Channel – Refers to one of eight, small-signal analog input interfaces to the module’s terminal block. Each channel is configured for connection to a input device, and has its own configuration and status words.

Chassis – See rack. CJC - (Cold Junction Compensation) The means by which the module

compensates for the offset voltage error introduced by the temperature at the junction between the thermocouple lead wire and the input terminal block (the cold junction).

Common mode rejection ratio (CMRR) - The ratio of a device’s differential voltage gain to common mode voltage gain. Expressed in dB, CMRR is a comparative measure of a device’s ability to reject interference caused by a voltage common to its terminal relative to ground.

Common mode voltage – The voltage difference between the negative terminal and analog common during normal differential operation.

Preface vii

Cut-off frequency - The frequency at which the input signal is attenuated 3 dB by the digital filter. Frequency components of the input signal that are below the cut-off frequency are passed with under 3 dB of attenuation for low-pass filters.

dB (decibel) – A logarithmic measure of the ratio of two signal levels. Digital filter - A low-pass mathmatic single order filter applied to the A/D

signal. The digital filter provides high-frequency noise rejection. Effective resolution – The number of bits in the channel data word that

do not vary due to noise. Local System - A control system with I/O chassis within several feet of

the processor. LSB (least significant bit) – The bit that represents the smallest value

within a string of bits. Mulitplexer – A switching system that allows several input signals to

share a common A/D converter. Normal mode rejection (differential mode rejection) – A logarithmic

measure, in dB, of a device’ s ability to reject noise signals between or among circuit signal conductors, but not between the equipment grounding conductor or signal reference structure and the signal conductors.

Module update time – See channel update time. Remote system - A control system where the chassis can be located

several thousand feet from the processor chassis. Chassis communication is via the 1756-DHRIO and 1756-ENET Adapter.

Resolution – The smallest detectable change in a measurement, typically expressed in engineering units (e.g. 0.15 °C) or as a number of bits. For example, a 12-bit system has 4096 possible output states. It can therefore measure 1 part in 4096. See also effective resolution.

RTD (Resistance Temperature Detector) - A temperature sensing element with 2, 3, 4, lead wires. It uses the basic characteristics that electrical resistance of metals increases with temperature. When a small current is applied to the RTD, it creates a voltage that varies with temperature. This voltage is processed and converted by the RTD module into a temperature value.

Sampling time - The time required by the A/D converter to sample an input channel.

viii ControlLogix™ Universal Analog Input Modules

Step response time – The time required for the A/D signal to reach 95% of its expected, final value, given a full-scale step change in the output data word.

Tags - Identifiers for configuration, data, and status information found withing the module. T ags allow the user to modify specific module attributes and view data and status.

Update time – The time for the module to sample and convert a channel input signal and make the resulting value available to the ControlLogix processor.

Table of Contents

Preface v

Module Overview 1

Installing And Wiring Your Module 9

Who Should Use This Guide ...................................................................................v

What This Guide Covers..........................................................................................v

Related Allen-Bradley Documents ...........................................................................v

T able A. Related Allen-Bradley documents .............................................................v

Terms & Abbreviations You Should Know ............................................................. vi

General Description .................................................................................................. 1

Detailed Specifications ............................................................................................. 2

Hardware Features .................................................................................................... 3

Diagnostic LEDs....................................................................................................... 4

System Overview...................................................................................................... 4

System Operation ..................................................................................................... 5

Module Operation .................................................................................................... 5

Compatibility with Thermocouple, Current, and Millivolt Devices & Cables ......... 6

Electrostatic Damage ................................................................................................ 9

Power Requirements............................................................................................... 10

T able 2.1 Maximum current drawn by the module ................................................. 10

Module Installation and Removal .......................................................................... 10

Figure 2.1 Module insertion into a rack ................................................................ 13

Figure 2.2 T erminal block diagram with keying ..................................................... 14

Wiring Your Module .............................................................................................. 14

Preparing and Wiring the Cables ........................................................................... 15

T erminal Block Layout............................................................................................ 16

Wiring Voltage/Current Inputs the IF8u Module................................................... 17

Wiring RTD or Resistance Sensors to the IF8u Module ....................................... 18

Wiring Thermocouples to the IF8u Module .......................................................... 20

Operation Within the ControlLogix System 23

Programming Your Module 29

Ownership and Connections .................................................................................. 23

Using RSNetW orx and RSLogix 5000..................................................................... 23

Direct Connections ................................................................................................. 24

Module Operation .................................................................................................. 24

Modules in a Local Chassis ................................................................................... 25

Requested Packet Interval (RPI) ............................................................................ 25

Modules in a Remote Chassis................................................................................ 26

Listen-Only Mode .................................................................................................. 27

Multiple Owners of Input Modules ....................................................................... 27

Configuration Changes in an Input Module with Multiple Owners...................... 28

Module Installation ................................................................................................ 29

Adding Your Module to a Project .......................................................................... 29

Configuring module attributes: Configuration Tags .............................................. 34

x ControlLogix™ Universal Analog Input Modules

Configuration, Data, and Status Tags 37

Send Configuration Data to the Module................................................................ 37

Configuration Tags ................................................................................................. 38

Global Module Settings .......................................................................................... 38

Channel Specific Settings ....................................................................................... 43

Input Tags .............................................................................................................. 50

Fault and Status Reporting Tags ........................................................................... 50

Module Data Tags.................................................................................................. 53

Programming Examples 55

Initial Programming................................................................................................. 55

Figure 5.1 Sample Ladder Logic ............................................................................ 56

Troubleshooting 61

Using Module Indicators to Troubleshoot............................................................ 61

Using RSLogix 5000 to Troubleshoot Your Module.............................................. 62

Module Configuration Errors ................................................................................. 64

Maintaining Your Module And Ensuring Safety 65

Module Specifications

Ther mocouple Descriptions 7 5

Preventive Maintenance ........................................................................................ 65

Safety Considerations ............................................................................................ 65

Electrical Specifications.......................................................................................... 69

Physical Specifications .......................................................................................... 70

Environmental Specifications................................................................................. 70

Input Specifications ............................................................................................... 70

J Type Thermocouples ........................................................................................... 75

K Type Thermocouples .......................................................................................... 77

T Type Thermocouples .......................................................................................... 79

E Type Thermocouples .......................................................................................... 81

R Type Thermocouples .......................................................................................... 83

S Type Thermocouples .......................................................................................... 84

B Type Thermocouples .......................................................................................... 86

N Type Thermocouples .......................................................................................... 87

References .............................................................................................................. 90

Using Grounded Junction, Ungrounded Junction, and Exposed Junction Ther mocouples 97

Programming Your Module 101

T able of Contents xi

Thermocouple Types .............................................................................................. 97

Grounded Junction ................................................................................................. 98

Ungrounded (Insulated) Junction .......................................................................... 98

Exposed Junction ................................................................................................... 98

Isolation.................................................................................................................. 98

Module Installation .............................................................................................. 101

Adding Your Module to a Project ........................................................................ 101

Declaration of Conformity .................................................................................... 105

xii ControlLogix™ Universal Analog Input Modules

Chapter 1

Module Overview

This chapter describes the universal analog input module and explains how the ControlLogix controller reads analog input data from the module. Read this chapter to familiarize yourself further with your universal analog input module. This chapter covers:

• general description and hardware features

• an overview of system and module operation

General Description

This module is designed exclusively for use in the Allen-Bradley ControlLogix 1756 I/O rack systems. The module stores digitally converted thermocouple, RTD, resistance, millivolt (mV), volt (V), milliamp (mA), and CJC temperature analog data in its image table for retrieval by all ControlLogix processors.

Following is a list of features available on the IF8u module that allow their use in a wide variety of applications.

· Removal and insertion under power (RIUP) - a system feature that

allows you to remove and insert modules while chassis power is applied

· Producer/consumer communications - an intelligent data exchange

between modules and other system devices in which each module produces data without having been polled

· Rolling timestamp of data - 15 bit module-specific rolling timestamp with

millisecond resolution which indicates when data was sampled/applied. This timestamp may be used to calculate the interval between channel or updates

· System timestamp of data - 64 bit system clock places a timestamp on

the transfer of data between the module and its owner controller within the local chassis

· IEEE 32 bit floating point format

· On-Board Features, such as custom User Scaling, Process Alarms, Rate

Alarms, Digital Filtering, and Under/Overrange Detection

· Automatic Calibration - analog I/O modules may perform autocalibration

on a channel-by-channel or module-wide basis to reduce drift inaccuracies due to module ambient temperature changes.

· Class I/Division 2, UL, CSA, CE, and FM Agency Certification

2 ControlLogix™ Counter Module

Detailed Specifications

Input Ranges The following tables provide compatibility information on the supported

thermocouple types and their associated temperature ranges, the supported RTD types and their associated temperature ranges, as well as the millivolt, volt, milliamp and resistance input types supported by the IF8u module. To determine the practical temperature range of your thermocouple, refer to the specifications in appendices A and B.

Table 1.1 Thermocouple Temperature Ranges

T ype °C Temperature Range °F Temperature Range J -210°C to 1200°C -346°F to 2192°F

K -270°C to 1372°C -454°F to 2502°F T -270°C to 400°C -454°F to 752°F B 300°C to 1820°C 572°F to 3308°F E -270°C to 1000°C -454°F to 1832°F R 0°C to 1768°C 32°F to 3214°F S 0°C to 1768°C 32°F to 3214°F N -210°C to 1300°C -346°F to 2372°F C 0°C to 2315°C 32°F to 4199°F CJC Sensor 0°C to 90°C 32°F to 194°F

Table 1.2 RTD Temperature Ranges

Type °C Temp Range °F Temp Range Platinum (385)

100 Ohm -200°C to +850°C -328°F to +1562°F 200 Ohm -200°C to +850°C -328°F to +1562°F 500 Ohm -200°C to +850°C -328°F to +1562°F 1000 Ohm -200°C to +850°C -328°F to +1562°F

Platinum (3916) 100 Ohm -200°C to +630°C -328°F to +1166°F 200 Ohm -200°C to +630°C -328°F to +1166°F 500 Ohm -200°C to +630°C -328°F to +1166°F 1000 Ohm -200°C to +630°C -328°F to +1166°F

Copper (426) 10 O hm -100°C to +260°C -148°F to +500°F

Nickel (618) 120 Ohm -100°C to + 260°C -148°F to +500°F 200 Ohm -100°C to + 260°C -148°F to +500°F 500 Ohm -100°C to + 260°C -148°F to +500°F 1000 Ohm -100°C to + 260°C -148°F to +500°F

Nickel (672) 120 Ohm -80°C to +260°C -112°F to + 500°F

Nickel/Iron (518) 604 Ohm -100°C to +200°C -148°F to +392°F

The digits in parenthisis following the RTD type represent the temperature coef ficient of resistance (alpha, a), which is defined as the resistance change per Ohm per°°C. For instance, Platinum 385 refers to a platinum RTD with a = 0.00385 Ohms/Ohm - °C, or simply 0.00385/°°C.

Table 1.3 Millivolt Input Ranges

Stated Actual

-50 to +50 mV (-75 to +75 mV)

-150 to +150 mV (-175 to +175 mV)

0 to +5.0 V (-0.5 to +5.5 V)

1.0 to +5.0 V (0.5 to +5.5 V)

0 to 10.0 V (-0.5 to 10.0 V)

-10.0 to +10.0 V (-10.0 to +10.0 V)

Table 1.4 Current Input Ranges

4 to 20 mA (-3.5 to +21.5mA) 0 to 20 mA (0 to +21.5mA)

Table 1.5 Resistance Input Range

0 to 250 Ohms 0 to 500 Ohms 0 to 1000 Ohms 0 to 2000 Ohms 0 to 3000 Ohms 0 to 4000 Ohms

Chapter 1: Module Overview 3

Hardware Features

All eight input channels are individually configurable for RTD, resistance, thermocouple, millivolt, volt, or milliamp input types. Each input channel provides wire-off input, over-range, and under-range detection and indication, when enabled.

The module fits into any single slot for I/O modules in a ControlLogix modular system. The module has a unique generic profile which may be configured using your RSLogix 5000 programming software.

The module utilizes one removable terminal block, that provides connections for the eight input channels. There are two cold-junction compensation (CJC) sensors that compensate for the cold junction at ambient temperature rather than at freezing (0°C). There are eight current sources for supplying the RTD or resistance sensors. The module is configured through RSLogix 5000 software, defining R TD, resistance, current or voltage input paths.

4 ControlLogix™ Counter Module

Table 1.6 Hardware Features

Hardware Function OK LED Displays communication and fault status of the module Cal LED Displays a fault condition Side Label (Nameplate) Provides module information Removable T erminal Block Provides electrical connection to input devices Door Label Permits easy terminal identification Self Locking T abs Secure module in chassis slot Terminal Block Switch Locks the R TB to the module.

Diagnostic LEDs

System Overview

The module contains diagnostic LEDs that help you identify the source of problems that may occur during power-up or during normal operation. Power-up and diagnostics are explained in Chapter 7, Testing Your Module.

The module communicates with the ControlLogix processor and receives +5 Vdc and +24 Vdc power from the system power supply through the parallel backplane interface. You may install as many universal modules in

the system as the power supply can support. Channels (0 through 7) can receive input signals from RTDs, resistance sources, thermocouples, millivolt, volt, or milliamp devices. When configured for thermocouple input types, the module converts analog input voltages into cold-junction compensated and linearized, digital temperature readings. The module uses the National Institute of Standards and T echnology (NIST) linearization tables based on ITS-90 for thermocouple linearization.

When configured for R TD input types, the module converts the analog input voltages into digital temperature readings, based on the alpha type, wire type, and ohms specified. The standards used are the JIS C 16041997 for the Pt 385 R TD types, the JIS C 1604-1989 for the Pt 3916 RTD types, SAMA RC21-4-1966 for the 10. Cu 426 RTD, DIN 43760 Sept. 1987 for the 120. Ni 618 RTD, and MINCO Application Aid #18 May 1990 for the 120. Ni 672 RTD.When configured for millivolt, volt, milliamp, or resistance analog inputs, the module converts the analog values directly into floating point values. For those input types, the module assumes that the input signal is linear prior to input into the module.

Chapter 1: Module Overview 5

Table 1.6 Hardware Features

System Operation

Module Operation

At power-up, the module checks internal circuits, memory , and basic functions. During this time the Cal LED remains on. If the module does not find any faults, it turns off the Cal LED. After completing power-up checks, the module wait for a connection to an owner controller then valid channel configuration data from your ladder logic program. After channel configuration data is transferred, and one or more channels are enabled, the module continuously converts the inputs to floating point data for use in your ladder program.

Each time the module reads an input channel, the module tests that data for a fault, i.e. over-range, or under-range condition. If it detects an overrange or under-range condition, the module sets a unique bit in the status tags.

The module’s input circuitry consists of eight differential analog inputs, multiplexed into an A/D converter. The A/D converter reads the analog input signals and converts them to floating point values.. The input circuitry also continuously samples the CJC sensors, if not disabled and compensates for temperature changes for thermocouples at the cold junction (terminal block). The sensors must be Spectrum Controls supplied temperature sensors. The module will not accept other CJC sensor inputs, and thermocouple inputs will not function properly if incorrect CJC sensors are used. Two CJC sensors are shipped with each module.

6 ControlLogix™ Counter Module

Compatibility with Ther mocouple, Current, and Millivolt Devices & Cables

The module is compatible with the following standard types of thermocouples: B, E, J, K, N, R, S, T and C and extension wire. Refer to appendices B and C for details. The module is also compatible with a variety of voltage and current devices with an output of ±50, ±150 mV, 05V , 1-5V, 0-10V , ±10V, 0-20mA, and 4-20mA. T o minimize interference from radiated electrical noise, we recommend twisted-pair and highly shielded cables such as the following:

Table 1.7 Recommendations to minimize interference from radiated electrical noise

For This Type of Device We Recommend This Cable (or equivalent) Thermocouple Type J EIL Corp. J20-5-502 Thermocouple T ype K EIL Corp. K20-5-510 Thermocouple T ype T EIL Corp. T20-5-502

Other Thermocouple T ypes consult with EIL Corp or other manufacturers mV, V , mA devices Belden 8761, shielded, twisted-pair Compatibility with RTD and Resistance devices and cables

The module is compatible 100. Platinum 385, 200. Platinum 385, 500. Platinum 385, 1000. Platinum 385, 100. Platinum 3916, 200. Platinum 3916,

500. Platinum 3916, 1000. Platinum 3916, 10. Copper 426, 120. Nickel

618 and 120. Nickel 672 R TD types and resistance inputs, and 3 possible wire types (2 wire, 3 wire, or 4 wire). Each RTD input individually supports three input pins on the terminal block: one excitation current source (EXC+), one sense positive (IN+) and one sense negative (IN-). Only those pins are connected that are required by the selected R TD or resistance wire type. For 2, 3, or 4 wire configurations, the module can support a maximum combined cable length associated with an overall cable impedance of 25 ohms or less without exceeding its input limitations. The accuracy specifications provided herein do not include errors associated with unbalanced cable impedance.

Since the operating principle of the RTD and resistance inputs is based on the measurement of resistance, take special care in selecting your input cable. For 2-wire or 3-wire configuration, select a cable that has a consistent impedance throughout its entire length. For 2-wire configurations, we recommend that you use Belden #9501 (or

equivalent). For 3-wire configurations, we recommend that you use Belden #9533 (or equivalent) for short installation runs (less than 100

feet) or use Belden #83503 (or equivalent) for longer runs (greater than 100 feet) and in high humidity environments.

Chapter 1: Module Overview 7

Table 1.8 Cable Specifications

Description Belden #9501 Belden#9533 Belden#83503 For 2-wire RTDs and 3-wire RTDs and 3-wire R TDs and

potentiometers. potentiometers. Short potentiometers.

When used? Long runs less than 100 feet runs greater than 100

8 ControlLogix™ Counter Module

Electrostatic Damage

Chapter 2

Installing And Wiring Y our Module

Read this chapter to install and wire your module. This chapter covers:

• avoiding electrostatic damage

• determining power requirements

• installing the module

• wiring signal cables to the module’s terminal block

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

CAUTION

ELECTROSTATICALLY SENSITIVE COMPONENTS

• Before handling the module, touch a grounded object to rid yourself of electrostatic charge.

• When handling the module, wear an approved wrist strap grounding device.

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

• Keep the module in its static-shield container when not in

use or during shipment.

Failure to observe these precautions can deg rade the module’s performance or cause permanent dama ge.

10 ControlLogix™ Universal Analog Input Module

Power Requirements

The module receives its power through the ControlLogix chassis backplane from the fixed or modular +5 VDC and +24 VDC chassis power supply . The maximum current drawn by the module is shown in the table below .

Table 2.1. Maximum current dr awn by the module

5VDC Amps 24VDC Amps

0.230 0.075

Using your module in the ControlLogix System

Place your module in any slot of a ControlLogix modular, or modular expansion chassis.

Module Installation and Removal

An analog I/O module translates an analog signal into, or from, a corresponding digital representation which controllers can easily operate on for control purposes.

A ControlLogix I/O module mounts in a ControlLogix chassis and uses a Removable T erminal Block (R TB) to connect all field-side wiring.

Before you install and use your module you should have already:

· installed and grounded a 1756 chassis and power supply.

· ordered and received an RTB for your application. Important: RTBs are not included with your module purchase. Specify Allen Bradley Part Number: 1756-TBCH - 36 position screw terminals

1756-TBS6H - 36 position press terminals

When installing the module in a chassis, it is not necessary to remove the terminal blocks from the module. However, if the terminal blocks are removed, use the write-on label located on the side of the terminal blocks to identify the module location and type.

Chapter 2: Installing And Wiring Y our Module 11

Preventing Electrostatic Discharge

This module is sensitive to electrostatic discharge.

TTENTION:TTENTION:

TTENTION:

TTENTION:TTENTION:

circuits or semiconductors if you touch backplane connector

pins. Follow these guidelines when you handle the module:

· Touch a grounded object to discharge static potential

· Wear an approved wrist-strap grounding device

· Do not touch the backplane connector or connector pins

· Do not touch circuit components inside the module

· If available, use a static-safe work station

· When not in use, keep the module in its static-shield box

Electrostatic discharge can damage integrated

Removal and Insertion Under Power

These modules are designed to be installed or removed while chassis power is applied.

TTENTION:TTENTION:

TTENTION:

TTENTION:TTENTION:

backplane power is applied, an electrical arc may occur. An

electrical arc can cause personal injur y or property damage by:

· sending an erroneous signal to your system’s field devices

causing unintended machine motion or loss of process control.

· causing an explosion in a hazardous environment.

Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connectors. Worn contacts may create electrical resistance that can affect module operation.

When you insert or remove a module while

Compliance to European Union Directives

If this product bears the CE marking, 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:

12 ControlLogix™ Universal Analog Input Module

EN 61010-1 and EN 61131-2, EN61000-6-2:2001, EN61000-6-4:2001 EN61010-1:2001

This product is intended for use in an industrial environment.

Low Voltage Directive

This product is tested to meet Council Directive 73/23/EEC Low Voltage, by applying the safety requirements of EN 61131-2 Programmable Controllers, Part 2 - Equipment Requirements and Tests.

For specific information required by , EN61131-2:1994 + A1 1:1996 + A12:2000, see the appropriate sections in this publication, as well as the following Allen-Bradley publications:

· Industrial Automation Wiring and Grounding Guidelines For Noise Immunity , publication 1770-4.1

· Automation Systems Catalog, publication B1 11

This equipment is classified as open equipment and must be installed (mounted) in an enclosure during operation as a means of providing safety protection.

CAUTION

POSSIBLE EQUIPMENT OPERATION

TTENTION:TTENTION:

TTENTION:

TTENTION:TTENTION: and Insertion Under Power (RIUP). However, when you remove or insert an RTB with field-side power applied, macmac

hine motion or loss ofhine motion or loss of

mac

hine motion or loss of

macmac

hine motion or loss ofhine motion or loss of

Exercise extreme caution when using this feature.

WARNING The 1756sc-IF8U module is to be used only with the Allen-

Bradley 1756 ControlLogix System.

The module is designed to support Removal

unintendedunintended

unintended

unintendedunintended

pr pr

ocess ocess

ocess

ocess ocess

contrcontr

ol can occurol can occur

contr

ol can occur.

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ol can occurol can occur

Chapter 2: Installing And Wiring Y our Module 13

T o insert your module into the rack, follow these steps:

1. Align the circuit board of your module with the card guides at the top and bottom of the chassis.

Figure 2.1. Module insertion into a rack

2. Key the R TB in positions that correspond to unkeyed module positions. Insert the wedge-shaped tab on the RTB with the rounded edge first. Push the tab onto the R TB until it stops.

Keying the Removable Terminal Block

Key the RTB to prevent inadvertently connecting the incorrect RTB to your module.

When the RTB mounts onto the module, keying positions will match up. For example, if you place a U-shaped keying band in position #4 on the module, you cannot place a wedge-shaped tab in #4 on the R TB or your RTB will not mount on the module.

W e recommend that you use a unique keying pattern for each slot in the chassis.

1. Insert the U-shaped band with the longer side near the terminals. Push

the band onto the module until it snaps into place.

14 ControlLogix™ Universal Analog Input Module

Figure 2.2. Terminal block diagram with keying

Wiring Your Module

Follow these guidelines to wire your input signal cables:

• 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, NFP A 70] and in accordance with the authority having jurisdiction.

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

• Route the field wiring away from any other wiring and as far as possible from sources of electrical noise, such as motors, transformers, contactors, and ac devices. As a general rule, allow at least 6 in. (about 15.2 cm) of separation for every 120 V of power.

• Routing the field wiring in a grounded conduit can reduce electrical noise further.

• If the field wiring must cross ac or power cables, ensure that they cross at right angles.

• T o limit the pickup of electrical noise, keep thermocouple, R TD, millivolt, and milliamp signal wires as far from power and load lines as possible.

• For improved immunity to electrical noise, use Belden 8761 (shielded, twisted pair) or equivalent wire for millivolt sensors; or use shielded, twisted pair thermocouple extension lead wire specified by the thermocouple or RTD manufacturer. Using the incorrect type of thermocouple extension wire or not following the correct polarity may cause invalid readings.

• Ground the shield drain wire at only one end of the cable. The preferred location is at the shield connections at the ControlLogix chassis. (Refer to IEEE Std. 518, Section 6.4.2.7 or contact your sensor manufacturer for additional details.)

Preparing and Wiring the Cables

Chapter 2: Installing And Wiring Y our Module 15

• Keep all unshielded wires as short as possible.

• T o limit overall cable impedance, keep input cables as short as possible. Locate your I/O chassis as near the RTD or thermocouple sensors as your application will permit.

• Tighten screw terminals with care. Excessive tightening can strip a screw . The RTB terminations can accommodate 2.1…0.25 mm2 (14…22 AWG) shielded wire and a torque of 0.5 N•m (4.4 lb•in.).

• Follow system grounding and wiring guidelines found in your ControlLogix Installation and Operation Manual.

T o prepare and connect cable leads and drain wires, follow these steps:

Signal Wires

Cable

Drain Wire

(At the module-end of the cable, extract the drain wire but remove the foil shield.)

(Remove foil shield and drain wire from sensor-end of the cable.)

Signal Wires

1. At each end of the cable, strip some casing to expose individual wires.

2. Trim signal wires to 5-inch lengths beyond the cable casing. Strip about 3/16 inch (4.76 mm) of insulation to expose the ends of the wires.

3. At the module-end of the cables (see figure above):

- extract the drain wire and signal wires

- remove the foil shield

- bundle the input cables with a cable strap

4. Connect pairs of drain wires together, Channels 0 and 1, Channels 2 and 3, Channels 4 and 5, Channels 6 and 7. Keep drain wires as short as possible.

5. Connect the drain wires to the grounding lug on the PLC chassis.

6. Connect the signal wires of each channel to the terminal block. Important: Only after verifying that your connections are correct for each channel, trim the lengths to keep them short. Avoid cutting leads too short.

7. At the source-end of cables from mV devices:

- remove the drain wire and foil shield

- apply shrink wrap as an option

16 ControlLogix™ Universal Analog Input Module

- connect to mV devices keeping the leads short

Important: If noise persists, try grounding the opposite end of the cable, instead (Ground one end only.)

Terminal Block Layout

The following figure shows the general terminal block layout. The input signal type will determine which pins are used.

Wiring Voltage/ Current Inputs the IF8u Module

Chapter 2: Installing And Wiring Y our Module 17

V oltage inputs use the terminal block pins labelled IN+ and INCurrent inputs use the terminal block pins labelled IN+ and IN-

Voltage Inputs

EXC+

IN+

INiRTN

CABLE SHIELD

Current Inputs

Voltage +

Voltage -

ADD JUMPER

EXC+

IN+

INiRTN

Current +

Current -

CABLE SHIELD

18 ControlLogix™ Universal Analog Input Module

Wiring RTD or Resistance Sensors to the IF8u Module

The IF8u module supports two, three, and four wire RTDs or resistance inputs connected individually to the module as shown in the figure below.

These are: * 2-wire R TDs, which are composed of 2 RTD lead wires (EXC+ and

IN- with a jumper between EXC+ and IN+)

* 3-wire R TDs, which are composed of a 2 Signal and 1 RTD return lead

wires (EXC+ and IN+ with a the return RTD lead to IN-)

* 4-wire R TDs, which are composed of 2 Signal and 2 RTD return lead

wires (EXC+ and IN+ with a the return RTD lead to IN-) The fourth lead is not used so wiring is identical to 3 wires RTDs.

* 2- wire Resistance, which is composed of 2 leads (EXC+ and IN- with

a jumper between EXC+ and IN+)

* 3- wire Resistance, which is composed of 3 leads (EXC+ IN+ and

IN-) and the resistance lies between IN+ and IN-

In any RTD sensing system, it is important that the lead and sense wire resistances are matched as much as possible. The lead lengths, and their resulting impedances, must be matched and kept small to eliminate the introduction of connectivity errors. The 3/4-wire R TDs are the most accurate, with 2-wire R TDs being the most inaccurate. In 2-wire the lead resistance adds error to the resulting degree reading. With a 1.008mA current source, 1Ω of lead resistance adds 1.008µV, or 2.82°C error, with the 100Ω 385 alpha type. T o gain an understanding of how lead resistance affects RTD readings, the µV/C for each RTD type is listed below.

Chapter 2: Installing And Wiring Y our Module 19

RTD Type Current Source V/°C

100Ω Pt 385 1.008mA 357µV/°C 200Ω Pt 38 5 1.008mA 714µV/°C 500Ω Pt 385 2 52 µA 447µV/°C 1000Ω Pt 385 25 2µA 893µV/°C

100Ω Pt 3916 1.008mA 377µV/°C 200Ω Pt 3916 1.008mA 754µV/°C 500Ω Pt 3916 25 2µA 472µV/°C 1000Ω Pt 3916 25 2 µA 941µV/°C

120Ω Ni 61 8 1.008mA 694µV/°C 200Ω Ni 618 1.008mA 1389µV/ 500Ω Ni 618 25 2µA 867µV/°C 1000Ω Ni 618 25 2µA 1733µV/°C

10Ω Cu 426 25 2µA 9.7µV/°C 120Ω Ni 67 2 1.008mA 929µV/°C

The accuracies specified for the IF8u R TDs do not include errors due to lead resistance imbalances.

Important: To ensure temperature or resistance value accuracy, the resistance difference of the cable lead wires must be equal to or less than

0.01 ohms.

Important: Keep total lead resistance as small as possible and less than 25 ohms.

There are several ways to insure that the lead values match as closely as possible. They are as follows:

* Use quality cable that has a small tolerance impedance rating. * Use a heavy gauge lead wire which has less resistance per foot.

Wiring Thermocouples to the IF8u Module

One end of thermocouple to IN+ Other end of thermocouple to IN-

Thermocouple Inputs

EXC+

IN+

INiRTN

CJC Sensors

CJC+

CJC-

CABLE SHIELD

White (With Potted Sensor)

White (No Sensor)

TC +

TC -

For cold junction compensation be sure the two supplied thermistors are connected. One should be connected between CJC0-IN+ and CJC0-INand the other should be connected between CJC1-IN+ and CJC1-IN-. Also be sure configuration tag “.CJDisable” is set to zero to perform cold junction compensation for thermocouple inputs

Cold Junction Compensation (CJC)

CAUTION

POSSIBLE EQUIPMENT OPERATION

Both CJCs are critical to ensure accur ate thermocouple input readings at each channel.

Failure to observe this precaution can cause unintended equipment operation and damage.

22 ControlLogix™ Universal Analog Input Module

Ownership andOwnership and

Ownership and

Ownership andOwnership and ConnectionsConnections

Connections

ConnectionsConnections

Chapter 3: Operation within the System 23

Operation Within the ControlLogix System

This chapter describes how the 1756sc-IF8u analog module works within the ControlLogix system. This chapter covers:

• Ownership and connections to the module

• Direct connections

• Listen only mode

• Configuration changes with multiple owners.

Every I/O module in the ControlLogix system must be owned by a Logix5550 Controller to be useful. This owner-controller stores configuration data for every module that it owns and can be local or remote in regard to the I/O module’s position. The owner sends the I/O module configuration data to define the module’ s behavior and begin operation within the control system. Each ControlLogix I/O module must continuously maintain communication with its owner to operate normally.

Using RSNetWorx and RSLogix 5000

T ypically , each module in the system will have only 1 owner . Input modules can have more than 1 owner . Output modules, however , are limited to a single owner.

The I/O configuration portion of RSLogix5000 generates the configuration data for each I/O module in the control system, whether the module is located in a local or remote chassis. A remote chassis, also known as networked, contains the I/O module but not the module’s owner controller . Configuration data is transferred to the controller during the program download and subsequently transferred to the appropriate I/ O modules. I/O modules in the same chassis as the controller are ready to run as soon as the configuration data has been downloaded. You must run RSNetW orx to enable I/O modules in the networked chassis.

Running RSNetW orx transfers configuration data to networked modules and establishes a Network Update Time (NUT) for ControlNet that is compliant with the desired communications options specified for each module during configuration. If you are not using I/O modules in a networked chassis, running RSNetW orx is not necessary. However, anytime a controller references an I/O module in a networked chassis, RSNetW orx must be run to configure ControlNet. Follow these general guidelines when configuring I/O modules:

1. Configure all I/O modules for a given controller using RSLogix 5000 and download that information to the controller .

24 ControlLogix™ Universal Analog Input Module

2. If the I/O configuration data references a module in a remote chassis, run RSNetWorx.

Important: RSNetWorx must be run whenever a new module is added to a networked chassis. When a module is permanently removed from a remote chassis, we recommend that RSNetWorx be run to optimize the allocation of network bandwidth.

DirectDirect

Direct

DirectDirect ConnectionsConnections

Connections

ConnectionsConnections

A direct connection is a real-time data transfer link between the controller and the device that occupies the slot that the configuration data references. When module configuration data is downloaded to an ownercontroller, the controller attempts to establish a direct connection to each of the modules referenced by the data.

If a controller has configuration data referencing a slot in the control system, the controller periodically checks for the presence of a device there. When a device’ s presence is detected, the controller automatically sends the configuration data. If the data is appropriate to the module found in the slot, a connection is made and operation begins. If the configuration data is not appropriate, the data is rejected and an error message displays in the software. In this case, the configuration data can be inappropriate for any of a number of reasons.

ModuleModule

Module

ModuleModule OperationOperation

Operation

OperationOperation

Modules in a Local Chassis

The controller maintains and monitors its connection with a module. Any break in the connection, such as removal of the module from the chassis while under power, causes the controller to set fault status bits in the data area associated with the module. The RSLogix 5000 software may monitor this data area to announce the modules’ failures.

In traditional I/O systems, controllers poll input modules to obtain their input status. Analog input modules in the ControlLogix system are not polled by a controller once a connection is established. The modules multicast their data periodically . Multicast frequency depends on the options chosen during configuration and where in the control system that input module physically resides. An input module’ s communication, or multicasting, behavior varies depending upon whether it operates in the local chassis or in a remote chassis. The following sections detail the differences in data transfers between these set-ups.

When a module resides in the same chassis as the owner controller, the following two configuration parameters will affect how and when the input module multicasts data:

· Real T ime Sample (R TS) configured via Real T ime Sample tag.

· Requested Packet Interval (RPI) configured via I/O module properties. Real Time Sample (RTS)

Requested Packet Interval (RPI)

Chapter 3: Operation within the System 25

This configurable parameter instructs the module to perform the following operations:

1. scan all of its input channels and store the data into on-board memory

2. multicast the updated channel data (as well as other status data) to the

backplane of the local chassis

This configurable parameter also instructs the module to multicast its channel and status data to the local chassis backplane.

The RPI instructs the module to multicast the current contents of its on-board memory when the RPI expires, (i.e. the module does not update its channels prior to the multicast).

Important: The RPI value is set during the initial module configuration using RSLogix 5000.

It is important to note that the module will reset the RPI timer each time an RTS is performed. This operation dictates how and when the owner controller in the local chassis will receive updated channel data, depending on the values given to these parameters. If the RTS value is less than or equal to the RPI, each multicast of data from the module will have updated channel information. In effect, the module is only multicasting at the R TS rate.

Modules in a Remote Chassis

If the R TS value is greater than the RPI, the module will multicast at both the RTS rate and the RPI rate. Their respective values will dictate how often the owner controller will receive data and how many multicasts from the module contain updated channel data. Note: Even though data may be transfered at the RPI rate, the data will be indentical to the previous R TS data transfer.

If an input module resides in a networked chassis, the role of the RPI and the module’s R TS behavior change slightly with respect to getting data to the owner. The RPI and RTS intervals still define when the module will multicast data within its own chassis (as described in the previous section), but only the value of the RPI determines how often the owner controller will receive it over the network.

When an RPI value is specified for an input module in a remote chassis, in addition to instructing the module to multicast data within its own chassis, the RPI also “reserves” a spot in the stream of data flowing across the ControlNet network.

The timing of this “reserved” spot may or may not coincide with the exact value of the RPI, but the control system will guarantee that the owner controller will receive data at least as often as the specified RPI.

26 ControlLogix™ Universal Analog Input Module

The “reserved” spot on the network and the module’s RTS are asynchronous to each other. This means there are Best and Worst Case scenarios as to when the owner controller will receive updated channel data from the module in a networked chassis.

Best Case RTS Scenario In the Best Case scenario, the module performs an RTS multicast with

updated channel data just before the “reserved” network slot is made available. In this case, the remotely located owner receives the data almost immediately.

Worst Case RTS Scenario In the W orst Case scenario, the module performs an RTS multicast just

after the “reserved” network slot has passed. In this case, the ownercontroller will not receive data until the next scheduled network slot.

Because it is the RPI and NOT the RTS which dictates when the module’s data will be sent over the network, we recommend the RPI value be set LESS THAN OR EQUAL TO the RTS to make sure that updated channel data is received by the owner controller with each receipt of data.

Listen-Only Mode

Multiple Owners of Input Modules

Any controller in the system can listen to the data from any I/O module (e.g. input data or “echoed” output data) even if the controller does not own the module (i.e. it does not have to hold the module’ s configuration data to listen to the module).

The “listen only” mode is set during the I/O configuration process. Choosing a ‘Listen-Only’ mode option allows the controller and module

to establish communications without the controller sending any configuration data. In this instance, another controller owns the module being listened to.

Important:Controllers using the Listen-Only mode continue to receive data multicast from the I/O module as long as a connection between an owner and I/O module is maintained. If the connection between all owners and the module is broken, the module stops multicasting data and connections to all ‘Listening controllers’ are also broken.

Because ‘Listening controllers’ lose their connections to modules when communications with the owner stop, the ControlLogix system will allow you to define more than one owner for input modules.

Important: Only input modules can have multiple owners. If multiple owners are connected to the same input module, they must maintain identical configuration for that module.

In the example below, Controller A and Controller B have both been configured to be the owner of the input module.

Chapter 3: Operation within the System 27

When the controllers begin downloading configuration data, both try to establish a connection with the input module. Whichever controller’s data arrives first establishes a connection. When the second controller’s data arrives, the module compares it to its current configuration data (the data received and accepted from the first controller).

If the configuration data sent by the second controller matches the configuration data sent by the first controller the connection is also accepted. If any parameter of the second configuration data is different from the first, the module rejects the connection and the user is informed by an error in the software.

The advantage of multiple owners over a ‘Listen-only’ connection is that now either of the controllers can lose the connection to the module and the module will continue to operate and multicast data to the system because of the connection maintained by the other owner controller.

Note: The previous discussion of multiple owners assues the configuration tag “.configrevnumber” is set to 1. Operation differs is the tag is set to 0. Refer to Chapter 5 for descriptions of this tag’s settings.

Configuration Changes in an Input Module with Multiple Owners

Y ou must be careful when changing an input module’ s configuration data in a multiple owner scenario. When the configuration data is changed in one of the owners, for example, Controller A, and sent to the module, that configuration data is accepted as the new configuration for the module. Controller B will continue to listen, unaware that any changes have been made in the module’ s behavior .

Important: When changing configuration for a module with multiple owners, we recommend the connection be inhibited. T o prevent other owners from receiving potentially erroneous data, as described above, the following steps must be followed when changing a module’ s configuration in a multiple owner scenario when online:

1. For each owner controller, inhibit the controller’s connection to the module in the software on the I/O Module Connection tab.

2. Make the appropriate configuration data changes in the software.

3. Repeat steps 1 and 2 for all owner controllers, making the exact same changes in all controllers.

4. Uncheck the Inhibit box in each owner’s configuration to reconnect

each module.

28 ControlLogix™ Universal Analog Input Module

Chapter 4

Programming Y our Module

This chapter explains how to program your module in the ControlLogix system. It also describes how the module’s input configuration are incorporated into your ladder logic program. T opics discussed include:

• importing the module’s configuration profile

• reviewing accessing and altering configuration options.

• configuring the modules input type and filter settings

• configuring alarms and limits

Module Installation

Adding Your Module to a Project

T o incorporate the module into the system, you must use the RSLogix 5000 programming software. If you’re using RSLogix 5000 version 15 or greater, an AOP (Add-On-Profile) is available and can be downloaded from our website at (http://www .spectrumcontrols.com/downloads.htm). The AOP allows you to add the IF8U to the RSLogix 5000 pick list and contains custom configuration screens for the module. If you do plan to use the AOP, you can skip the remainder of this chapter.

For those that plan to use RSLogix 5000 version 14 or older, the generic module profile must be used to add the IF8U to a new or existing project. An RSLogix 5000 sample project utilizing the generic module profile is available for download on our website at (www .spectrumcontrols.com/ downloads.htm). The ladder sample contains user defined input and configuration tags used to configure and read analog data from the IF8U module. The configuration tags control features such as the modules input type, channel input range, data format, filter frequency, etc.

The module has a unique set of tag definitions which are used to configure specific features. Chapter 5, Channel Configuration, Data, and Status, gives you detailed information about the data content of the configuration. These values are set using your programming software and ladder logic. Before you can use these feature you must first include the module into the project.

30 ControlLogix™ Universal Analog Input Module

Open the sample project with the IF8u information. Open your project. Drag and drop the IF8u module into the I/O configuration section of your project.

1. Open the sample project.

2. Open your new project.

3. Click once on the IF8u in the sample project.

4. Drag and drop it into the I/O Configuration section of your project. See Appendix D for the I/O module property details.

Chapter 4: Programming Y our Module 31

Drag and drop the IF8u user-defined data types from the sample

project into your project. There are four IF8u user defined data types that need to be moved.

ChannelConfig ChannelStatus IF8u_Config_Template IF8u_Input_Template

1. Click on the data type

2. Drag it into your new project.

3. Continue to drag and drop the data types until all four have been moved. Note: These can only be moved one at a time.

32 ControlLogix™ Universal Analog Input Module

Drag and drop the controller configuration tags from the sample

project into your project.

1. Right click on the Controller T ags item of the sample project and select edit.

2. Right click on the Controller T ags item of your project and select edit.

3. Scroll down to the Controller tags of the sample project and select all the tags by highlighting them.

4. Drag and drop these tags into your project. Note: IF8u_Config and IF8u_Input contain the configuration, data and

status tags for the IF8u module. The other tags are used for performing various functions to your module via ladder logic.

Note: Be sure all tags are displayed before moving them. Select Display All from the Edit drop down window.

Note: The “Local:3:I” and “Local:3:C” tags are not copied.

Chapter 4: Programming Y our Module 33

Create a new ladder logic routine in your project.

1. In your project, right mouse click on the MainRoutine item and select “New Routine...” IF8u was entered in the example above.

2. Double click on the MainRoutine item in the sample project and then double click on the added new routine in your project to display their corresponding ladder logic.

3. Left mouse inside the MainProgram ladder logic in the sample project and press crtl-A to select all the rungs.

4. Drag and drop these rungs over and add them to the new routine’s ladder logic. Note: Y ou will need to delete the one blank “solid bar” rung either at the top or bottom of the routine which was left over from the newly created routine.

5. Now add a JSR ladder instruction in your MainRountine which calls this routine.

Note: RSLogix 5000 will verify the ladder logic sample. You may receive errors regarding invalid tags. You will need to change the slot addressing in the logic to coordinate with the location of the IF8u.

This completes the installation of module in the system

34 ControlLogix™ Universal Analog Input Module

Configuring module attributes: Configuration Tags

The module has settings that are global and channel specific. These are accessed via the controller tags. Specific information regarding these tag settings may be found in Chapter 5.

Global module tags

These settings are used globally by the module. They control features such as the module autocalibration modes, and various other attributes.

Chapter 4: Programming Y our Module 35

Channel Specific Tags

These settings control channel specific behavior such as input type, range, filter frequency , units, and alarms. Specific information regarding these tags may be found in Chapter 5.

Data Tags

These tags represent the process data values in their final form.

36 ControlLogix™ Universal Analog Input Module

Status Tags

These tags report module status such as alarm conditions, faults, and errors.

Chapter 5: Channel Configuration, Data, and Status 37

Chapter 5

Choosing a Wiring Method The 1756-IF16 and 1756-IF8 modules support the following three wiring

Configuration, Data, and Status Tags

Read this chapter to:

• send configuration data to the module

• configure global module properties

• configure each input channel

• check each input channel’s data

• check module and individual channel status

This chapter outlines the detailed settings for the 1756sc-IF8u. These settings determine the modules input types, filter frequencies, scan rates, and various attributes. Detailed descriptions of these settings are available in the Tag Definition section of this chapter.

Send Configuration Data to the Module

Note: An AOP (Add-On_Profile) is availabe for the 1756sc-IF8U and can be downloaded from our website at (http://www.spectrumcontrols.com/ downloads.htm).

Note: The following format is used to describe tags

Tag Name Range Data Type

After changing the configuration tags in this chapter you must then send them to the module. To do this you may perform any of these operations:

1. Inhibit then un-inhibit the module via the module properties dialog, Connection Tab

2. Reset the module via the modules properties dialog. Module Info tab.

3. Reset the module via ladder logic. See the “DoReset” rung in the sample ladder project.

4. Perform a “Set Attribute All” or Module Reconfigure message instruction via ladder logic. Refer to your sample program for information about the “DoSetAttrAll” command.

38 ControlLogix

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Universal Analog Input Module

Note: If an invalid configuration is sent to the module a connection error will occur. See chapter 7 for a list of error codes.

Configuration Tags

Global Module Settings

The following Global Module Settings and Channel Specific Settings sections allow custom configuration of the module. These tags can be found within the IF8u_config controller tag.

The following tag settings are module related:

Configuration ManagementConfiguration Management

Configuration Management

Configuration ManagementConfiguration Management

.ConfigRevNumber 0, 1 BOOL

0: The module will always accept this configuration if valid. This value must be used for on-the-fly configuration changes.

1: In multiple owner systems if there is already a connection to the module then this configuration must match the one of the current connection in order for this controller to connect to the module.Channel On/Off

Note: The Module Reconfigure message instruction sets this parameter to zero.

Temperature Measurement:

.RemoteTermination 0, 1 BOOL

Not Used.

.CJDisable 0, 1 BOOL

0: The cold junction compensation terminal block thermistors will be read. Thermocouple input values will be compensated based on the thermistor readings.

1: The cold junction compensation thermal block thermistors will not be read. Thermocouple input values will be compensated with the default 25 degC value plus CJCOffset.

Note: 2 thermistors have been provided with the module to be installed on your terminal block if cold junction compensation is to be used.

.TempMode 0, 1 BOOL

0: Temperatures for thermocouples, RTDs and the cold junction thermistors will be displayed in degrees Celsius.

Chapter 5: Channel Configuration, Data, and Status 39

1: Temperatures for thermocouples, RTDs and the cold junction thermistors will be displayed in degrees Fahrenheit.

.CJOffset -25 to +65 degC REAL

-45 to + 117 degF

A temperature offset added to the cold junction compensation temperature values. This is interpreted as degrees C if the .TempMode = 0 and degrees F if the .TempMode = 1.

Module Sampling Time

The universal module update time is defined as the time required for the module to sample and convert the input signals of all enabled input channels and make the resulting data values available to the processor. The sample time is influenced by the input type, filter frequency, CJC acquisition (if enabled) and autocal configuration settings. For example, when thermocouples are selected, it is necessary to perform a cold junction compensation, (CJC), measurement to obtain best possible accuracy. This CJC measurement occurs in a systematic fashion and adds approximately 26ms to the update time. The following tables illustrate the components used to calculate typical channel update times.

Overhead:

5 ms - This must be included in all calculations and represents backplane communication and other service routines within the module.

Filter Frequency:

The channel filter frequency will impact timing. The following table shows associated time adders based on frequency selection.

Filter Additional Time

10Hz 125 ms per channel 50/60Hz 26 ms per channel 100Hz 18 ms per channel 250Hz 10 ms per channel 1kHz 6 ms per channel

40 ControlLogix

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Universal Analog Input Module

Input Type:

Each input type has a specific settling time. Select each channel input type and add the time value.

Time (ms) Type Tag: .RangeType

0 All voltage, current, and thermocouple types 3 100_Pt_385 8 3 100_Pt_392 12 3 120_Ni_618 16 3 120_Ni_672 20 3 10_Cu_426 21 3 604_NiFe_518 22 3 0_250_Ohm 23 3 0_500_Ohm 24 4 200_Pt_385 9 4 500_Pt_385 10 4 200_Pt_392 13 4 500_Pt_392 14 4 200_Ni_618 17 4 500_Ni_618 18 4 0_1000_Ohm 25 4 0_2000_Ohm 26 8 1000_Pt_385 11 8 1000_Pt_392 15 8 1000_Ni_618 19 8 0_3000_Ohm 27 8 0_4000_Ohm 28

Example 1:

4 channels with 200 Ohm PT 385 RTD (Input Type 9) at 100Hz filter =

18ms + 4ms = 22ms * 4 channels = 88ms 2 channels of voltage at 1khz = 2 * 6ms = 12ms 2 thermocouples at 250Hz = 2 * 10ms = 20ms

Total = 5ms (overhead) + 26ms (CJC) + 88ms + 12ms + 20ms = 151ms (Actual measured = 158ms)

Example 2:

8 channels, 0-4000 ohm (type 28) at 250Hz = 10ms + 8ms = 18ms * 8 = 144ms + 5ms = 149ms. (Actual measured = 117ms)

Note: This is approximation only. The time changes because the software does not need to spend time setting up the ADC for another filter frequency if it is the same as the previous channel. The same applys for the the gain settings, etc. Example 2 illustrates there is a significant savings because the filter frequency and input type are the same.

Note: If the autocalibration is enabled the module sampling time will increase by as much as 500ms when autocalibration is being performed.

Chapter 5: Channel Configuration, Data, and Status 41

.RealTimeSample 10-30,000 ms INT

The time in milliseconds that updated input data is to be sent from the module to the controller. If this value is smaller than the minimum update time to scan all input channels, then the actual rate will be greater than this value. In this case you may determine what the actual sample time is by subtracting two successive values of the .RollingTimeStamp input tag.

Real Time Sampling (RTS) and Requested Packet Interval (RPI)

This RealTimeSample tag instructs the module to scan its input channels and obtain all available data. After the channels are scanned, the module multicasts that data. This feature is used on a module-wide basis.

During module configuration, you specify a Real Time Sampling (RTS) period via the .RealTimeSample tag and a Requested Packet Interval (RPI) period. Both of these features instruct the module to multicast data, but only the RTS feature instructs the module to scan its channels before multicasting.

You may access the RPI in the Module Properties menu.

42 ControlLogix

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Universal Analog Input Module

Automatic Calibration:

Autocalibration is an automated input path calibration. This insures best possible accuracy under varying application conditions. Autocalibration may be turned on or off. When autocalibration is active you may also set the interval at which the calibration occurs.

.DisableCyclicAutocal 0, 1 BOOL

0: Module auto-calibration is performed on power up, reset, and reconfiguration as well as according to the .CyclicAutocalPeriod.

1: Module auto-calibration is only performed on module power-up, reset, and reconfiguration.

Note: Changing the following tags via the set attribute all or module reconfiguration message will not cause the auto-calibration to be performed upon acceptance of the configuration.

.Alarm Enable .ProcessAlarmLatch .RateAlarmLatch .TenOhmOffset .DigitalFilter .RateAlarmLimit .LowSignal .HighSignal .LowEngineering .HighEngineering .LAlarmLimit .HighAlarmLimit .LLAlarmLimit .HHAlarmLimit .AlarmDeadband

.CyclicAutocalPeriod 0-3 INT

Perform module auto-calibration: 0: Only on powerup and reset. 1: Every 1 minute. 2: Every 10 minutes. 3: Every 30 minutes.

Note: Options 1 through 3 are not valid if cyclic autocal is disabled.

Channel Specific Settings

Chapter 5: Channel Configuration, Data, and Status 43

The following settings allow you to configure individual channel parameters. Each channel, 0 through 7, has these tags.

Channel On/Off:

.DisableChannel 0, 1 BOOL

0: Channel is enabled. 1: Channel is disabled.

You may decrease the module sampling time by disabling unused channels.

Input Range/Type

.RangeType 0-37 INT

You can select from a series of operational ranges for each channel on

your module. The range designates the minimum and maximum signals that are detectable by the module. In the case of thermocouple or RTD sensors the selected type dictates the linearization curve of the particular sensor.

0 = -0.05 to 0.05V (-0.075 to 0.075V) 19 = RTD 1000Ω Ni 618 1 = -0.15 to 0.15V (-0.175 to 0.175V) 20 = RTD 120Ω Ni 672 2 = 0 to 5V (-0.5 to 5.5V) 21 = RTD 10Ω Cu 426 3 = 1 to 5V (0.5 to 5.5V) 22 = RTD 604Ω Ni-Fe 518 4 = 0 to 10V (-0.5 to 10.0V) 23 = Resistance 0 to 250Ω 5 = -10.0 to 10.0V 24 = Resistance 0 to 500Ω 6 = 0 to 20mA (0 to 21.5mA) 25 = Resistance 0 to 1000Ω 7 = 4 to 20mA (3.5 to 21.5mA) 26 = Resistance 0 to 2000Ω 8 = RTD 100Ω Pt 385 27 = Resistance 0 to 3000Ω 9 = RTD 200Ω Pt 385 28 = Resistance 0 to 4000Ω 10 = RTD 500Ω Pt 385 29 = TC Type J 11 = RTD 1000Ω Pt 385 30 = TC Type K 12 = RTD 100Ω Pt 3916 31 = TC Type T 13 = RTD 200Ω Pt 3916 32 = TC Type E 14 = RTD 500Ω Pt 3916 33 = TC Type R 15 = RTD 1000Ω Pt 3916 34 = TC Type S 16 = RTD 120Ω Ni 618 35 = TC Type B 17 = RTD 200Ω Ni 618 36 = TC Type N 18 = RTD 500Ω Ni 618 37 = TC Type C

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Temperature Measurement:

.RTD3Wire 0, 1 BOOL

0 = Two wire RTD or resistor if RTD or resistor input type for this channel is selected. 1 = Three or four wire RTD or resistor if RTD or resistor input type for this channel is selected.

.DisableCyclicLead 0, 1 BOOL

0 = If 3 or 4 wire RTDs or resistors are selected then the lead resistances are also read and compensated for. Note: Only one channel’s lead resistance is read during each all channel scan, every 5 minutes. This reduces the effect of the increased scan time due to lead measurements. This means, however, that the lead resistance for any given channel will be measured only once every 5 minutes if all channels are enabled with 3 or 4 wire RTDs.

1 = RTD lead resistance will only be read for this channel on power up, reset, and reconfigure.

.TenOhmOffset -100 to 100 INT

An optional offset in ohms to be applied to the 10 ohm copper RTD input type. -100 to 100 correspond to -1.00 to 1.00 ohms.

For example, if the resistance of a copper RTD used with this channel was 9.74 ohms at 25oC, you would enter -0.26 in this field.

Process Alarms:

Process alarms alert you when the module has exceeded configured high

or low limits for each channel. You can latch process alarms.

These are set at four user configurable alarm trigger points:

· High high

· High

· Low

· Low low

You may configure an Alarm Deadband to work with these alarms. The

deadband allows the process alarm status bit to remain set, despite the alarm condition disappearing, as long as the input data remains within the deadband of the process alarm.

Chapter 5: Channel Configuration, Data, and Status 45

Rate Alarm

The rate alarm triggers if the rate of change between input samples for

each channel exceeds the specified trigger point for that channel. It is

based on the channels .RangeType native units per second. (V, mA, degC (.TempMode = 0), degF (.TempMode = 1), Ohms.)

For example, if you set the a channel, with a voltage range type, to a rate alarm of 1.0 V/S, the rate alarm will only trigger if the difference between measured input samples changes at a rate > 1.0 V/S. If the module’s actual sampling time is 100 ms (i.e. sampling new input data every 100ms) and at time 0, the module measures 5.0 volts and at time 100ms measures

5.08 V, the rate of change is (5.08V - 5.0V) / (100mS) = 0.8 V/S. The rate alarm would not set as the change is less than the trigger point of

1.0V/s.

If the next sample taken is 4.9V, the rate of change is (4.9V-5.08V)/ (100mS)=-1.8V/S. The absolute value of this result is > 1.0V/S, so the rate alarm will set. Absolute value is used because rate alarm checks for the magnitude of the rate of change being beyond the trigger point, whether a positive or negative excursion.

Note: The module acquires data continuously even though it is only reported to the controller at the .RealTimeSample rate. The sampling time used for calculating the rate alarm is the acquisition rate. This can be determined by setting the .RealTimeSample tag to 10ms (Faster than the module can acquire data) and record the difference between successive .RollingTimeStamp values.

.AlarmEnable 0, 1 BOOL

0: Process and rate alarms are disabled 1: Process and rate alarms are enabled.

.ProcessAlarmLatch 0, 1 BOOL

0: Process alarms are not latched. 1: Process alarms are latched.

.RateAlarmLatch 0, 1 BOOL

0: Rate alarm is not latched. 1: Rate alarm is latched.

.RateAlarmLimit 0 to 4x of native signal value REAL

Specifies a rate alarm will occur if the input data changes more than the configured amount per second between two successive reads either negative or positive. Specified in units (V, mA, Ohms, DegC, DegF) per second.

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.LAlarmLimit REAL

A low alarm will activate if the value of the scaled input is at or below this value. It will clear, if not latched, if it is above this level plus the .AlarmDeadband amount.

.HAlarmLimit REAL

A high alarm will activate if the value of the scaled input is at or above this value. It will clear, if not latched, if it is below this level plus the .AlarmDeadband amount.

.LLAlarmLimit REAL

A low-low alarm will activate if the value of the scaled input is at or below this value. It will clear, if not latched, if it is above this level plus the .AlarmDeadband amount.

.HHAlarmLimit REAL

A high-high alarm will activate if the value of the scaled input is at or above this value. It will clear, if not latched, if it is below this level plus the .AlarmDeadband amount.

.AlarmDeadband REAL

A value used for determining when an alarm condition goes away. See it’s use in the above alarm tags.

Input Signal Scaling:

With scaling, you change a quantity from one notation to another. When you scale the module, you must choose two points along the module’s operating range and apply low and high values to those points. For example,you can cause a 4mA input to display 0% and a 20mA input to display 100%. Scaling causes the module to return data to the controller so that 4mA returns a value of 0% in engineering units and 20mA returns a value of 100% in engineering units.

The module may operate with values beyond the 4mA to 20mA range. If an input signal beyond the low and high signals is present at the module (e.g.3mA), that data will be represented in terms of the engineering units set during scaling. For example...

Configuration: .RangeType = 6 (0-20mA) .LowSignal = 4 (4mA) .HighSignal = 20 (20mA) .LowEngineering = 0 (0%) .HighEngineering = 100 (100%)

Note: If the signal and engineering range are left at zero, the default range is utilized. Refer to pages 2 and 3 for valid signal and engineering ranges.

Chapter 5: Channel Configuration, Data, and Status 47

Current: Engineering

Units value:

3mA -6.25% 4mA 0% 12mA 50% 20mA 100% 21mA 106.25%

Important: In choosing two points for the low and high signal value of

your channel, you do not limit the range of the module.

.LowSignal REAL

When the input is this value it will scale the input to the .LowEngineering value.

.HighSignal REAL

When the input is this value it will scale the input to the .HighEngineering value.

.LowEngineering REAL

The scaled value that will be displayed when the input is at the .LowSignal value.

.HighEngineering REAL

The scaled value that will be displayed when the input is at the .HighSignal value.

Note: User scaling is disabled if .LowSignal is equal to .HighSignal or .LowEngineering is equal to .HighEngineering.

Input Filters:

Module Filter

The universal module uses a ADC filter that provides high frequency noise rejection for the input signals. The ADC filter is programmable, allowing you to select from four filter frequencies for each channel. The filter provides the highest noise rejection at the selected filter frequency.

Selecting a low value (i.e. 10 Hz) for the channel filter frequency provides the best noise rejection for a channel, but it also increases the channel update time. Selecting a high value for the channel filter frequency provides lower noise rejection, but decreases the channel update time.

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The module filter is a built-in feature of the Analog-to-Digital convertor which attenuates the input signal beginning at the specified frequency. This feature is used on a individual channel basis.

In addition to frequency rejection, a by-product of the filter selection is the minimum sample rate (RTS) that is available. For example, the 1000Hz selection will not attenuate any frequencies less than 1000Hz and will allow sampling of all 8 channels within 38ms. But the 10Hz selection will reject all frequencies above 10Hz and will only allow sampling all 8 channels within 988ms.

.ADCFilter 0-4 SINT

Analog to digital converter (ADC) filter value. The signal read by the ADC is filtered prior to being available to the user. 0 = 50/60Hz 1 = 10Hz 2 = 100Hz 3 = 250Hz 4 = 1,000Hz.

Digital Filter

The digital filter smoothes input data noise transients on each input channel. This value specifies the time constant for a digital first order lag filter on the input. It is specified in units of milliseconds. A value of 0 disables the filter.

The digital filter equation is a classic first order lag equation.

Using a step input change to illustrate the filter response, as shown below, you can see that when the digital filter time constant elapses, 63.2% of the total response is reached. each additional time constant achieves 63.2% of the remaining response.

Chapter 5: Channel Configuration, Data, and Status 49

.DigitalFilter 0- 32767 ms INT

The time constant for a digital first order lag filter applied to the input data for smoothing noise transients. 0 = no digital filter. 100 = data will achieve 63.2% of its value in 100ms.

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Input Tags

Fault and Status Reporting Tags

The following fault and status reporting and module data sections allow monitoring of faults, status, and input data from the module. These tags can be found withing the IF8U_Input controller tag.

The 1756-IF8u module multicasts status/fault data to the owner/listening controller with its channel data. The fault data is arranged in such a manner as to allow the user to choose the level of granularity he desires for determining fault conditions.

Three levels of tags work together to provide an increasing degree of detail as to the specific cause of faults on the module. The following tags can be examined in ladder logic to indicate when a fault has occurred:

Channel Fault Word - This word provides underrange, overrange, and communications fault reporting. It’s tag name is .ChannelFaults.

Module Fault Word - This word provides fault summary reporting. Its tag name is .ModuleFaults.

Channel Status W ords - These words provide individual channel

underrange and overrange fault reporting for process alarms, rate alarms

and calibration faults. Its tag name is .ChannelStatus.

.ChannelFaults

Bits 0-7, corresponding to channels 0-7 respectively, will be set if the channle is over range or under range.

Any bits set in ChannelFaults sets the ModuleFaults word, InGroupFault and AnalogGroupFault bits.

All bits of the .ChannelFaults tag will be set (16#FFFF) when a communication fault has occured and its owner controller

.Ch0Fault .Ch1Fault .Ch2Fault .Ch3Fault .Ch4Fault .Ch5Fault .Ch6Fault .Ch7Fault

Ch(x)Fault - Individual channel fault status bit. This indicates an

overrange or underrange condition on the channel. These bits are also set by the controller if communications are lost with the I/O module.

Chapter 5: Channel Configuration, Data, and Status 51

.ModuleFaults

Below are a collection of all module level fault bits. Bits are defined as follows:

0 - 7 are unused 8 - CJOverrange 9 - CJUnderrange 10 - unused 11 - CalFault, set if IF8U_Input.ChannelStatus[x].CalFault bit is set 12 - unused 13 - unused 14 - InGroupFault 15 - AnalogGroupFault

Any bit set in the ChannelFaults word sets both the InGroupFault and AnalogGroupFault bits.

.AnalogGroupFault

Indicates if a channel fault has occurred on any channel.

.InGroupFault

Indicates if a channel fault has occurred on any channel.

.CalFault

Status bit indicating if any channel has a bad calibration means that the last attempt to auto calibrate the channel failed with an error and was aborted.

.CJ0Underrange

Status bit to indicate if the Cold junction sensor CJC0 reading is currently beneath the lowest detectable temperature of 0.0 degrees Celsius or open wire.

.CJ0Overrange

Status bit to indicate if the Cold junction sensor CJC0 reading is currently above the highest detectable temperature of 90.0 degrees Celsius or short circuit.

.CJ1Underrange

Status bit to indicate if the Cold junction sensor CJC1 reading is currently beneath the lowest detectable temperature of 0.0 degrees Celsius or open wire.

.CJ1Overrange

Status bit to indicate if the Cold junction sensor CJC1 reading is currently above the highest detectable temperature of 90.0 degrees Celsius or short circuit.

.CJCCalFault

Status bit to indicate if the Cold junction sensor CJC1 or CJC2 calibration failed.

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Channel related status tags:

The following channel related tags are preceded by the tag name IF8U_Input.ChannelStatus[X] where X is the channel number 0-7

.Underrange

Indicates the channel’s input is equal to or less than the minimum value for the selected range or open wire.

Note: The (-10 to +10vdc) input type does not support this function.

.Overrange

Indicates the channel’s input is equal to or above the maximum value for the selected range.

Note: The (-10 to +10vdc) and (0 to 10vdc) input types do not support this function.

.CalFault

Status bit indicating if the channel has a “Bad” calibration means that the third attempt to autocalibrate the channel failed with an error and was aborted.

.RateAlarm

Alarm bit which gets set when the input channel’s rate of change exceeds the configured RateAlarmLimit. Remains set until the rate of change drops below the configured limit unless latched via RateAlarmLatch in the configuration.

.LAlarm

Low alarm bit which is set when the input signal moves beneath the configured low alarm trigger point (LAlarmLimit). Remains set until the input signal moves above the trigger point, unless latched via ProcessAlarmLatch or the input is still within the configured alarm deadband of the low alarm trigger point.

.HAlarm

High alarm bit which is set when the input signal moves above the configured high alarm trigger point(HAlarmLimit). Remains set until the input signal moves below the trigger point, unless latched via ProccessAlarmLatch or the input is still within the configured alarm deadband of the high alarm trigger point.

.LLAlarm

Low low alarm bit which is set when the input signal moves beneath the configured low low alarm trigger point(LLAlarmLimit). Remains set until the input signal moves above the trigger point, unless latched via ProccessAlarmLatch or the input is still within the configured alarm deadband of the low low alarm trigger point.

Chapter 5: Channel Configuration, Data, and Status 53

.HHAlarm

High high alarm bit which is set when the input signal moves above the configured high high alarm trigger point(HHAlarmLimit). Remains set until the input signal moves below the trigger point, unless latched via ProccessAlarmLatch or the input is still within the configured alarm deadband of the high high alarm trigger point.

.Status

Below are a collection of individual channel status bits. Bits are defined as follows:

0 – HHAlarm 1 – LLAlarm 2 – HAlarm 3 – Lalarm 4 – RateAlarm 5 – Overrange 6 – Underrange 7 – CalFault 8 – 15 are unused

Module Data Tags

The following data tags are preceeded by the tag name IF8u_Input.ChannelData[x] where x is the channel number 0-7.

.Ch0Data REAL

The channel 0 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

.Ch1Data REAL

The channel 1 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

.Ch2Data REAL

The channel 2 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

.Ch3Data REAL

The channel 3 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

.Ch4Data REAL

The channel 4 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

.Ch5Data REAL

The channel 5 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

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.Ch6Data REAL

The channel 6 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

.Ch7Data REAL

The channel 7 input signal represented in engineering units. The input signal is measured and then scaled based on the user configuration.

.CJ0Data REAL

The cold junction sensor temperature of CJC0 in degrees Celsius or Fahrenheit.

.CJ1Data REAL

The cold junction sensor temperature of CJC1 in degrees Celsius or Fahrenheit.

.CSTTimestamp 2 dimension array of DINT

Timestamp taken at time the input data was sampled and placed in terms of Coordinated System Time which is a 64bit quantity in microseconds coordinated across the rack. Must be addressed in 32 bit chunks as an array.

.RollingTimestamp INT

Timestamp taken at time the input data was sampled which is in terms of milliseconds relative solely to the individual module.

Chapter 6: Ladder Program Examples 55

Chapter 6

Programming Examples

Earlier chapters explained how the tag configuration defines the way the module operates. This chapter shows some basic programming which controls the operation of the module. It also provides you with segments of ladder logic specific to unique situations that might apply to your programming requirements.

Initial Programming

Figure 5.1 illustrates some basic ladder logic commands which will allow you to:

• program the initial configuration into the module

• copy data to user defined tags

• reset the module

• make on-the-fly configuration changes

• unlatch alarms

Additional ladder logic and configuration samples may also be found on our web site: www.spectrumcontrols.com .

56 ControlLogix™ Universal Analog Input Module

Figure 5.1 Sample Ladder Logic

Rung 0 - This rung copies the configuration data (IF8u_Config) into the module’s configuration image memory . This rung is required.

Rung 1 - This rung copies the input data received from the module’s input memory into the IF8u_Input tag for monitoring and ladder usaged. this rung is required.

Rung 2 - This is an optional example rung indicating how to reset the module via ladder logic.

Chapter 6: Ladder Program Examples 57

Rung 3 - This is an optional example rung indicating how to send on-thefly configuration data to the module. This is useful if you would like to change channel alarm or scaling tags without causing interuption in channel updates. Changing other tags will cause a 2.5 second delay in channel updates but the connection will not be interupted.

Continued on next page...

58 ControlLogix™ Universal Analog Input Module

Y ou may use either the SetAttributeAll or the Module Reconfigure message.

Set Attribute All message:

Module Reconfigure Message:

Chapter 6: Ladder Program Examples 59

Rung 4: This rung describes how to unlatch process alarms.

60 ControlLogix™ Universal Analog Input Module

Using Module Indicators to Troubleshoot

Chapter 7

T roubleshooting

The universal analog I/O module has indicators which provide indication of module status. ControlLogix modules use the following:

LED This display: Means Take this action:

O K Steady Green Light The inputs are being multicast None O K Flashing Green Light The module has passed internal None

diagnostics but is not currently performing connected communication

OK Flashing Red Light Previously establisched communication Check controller

has timed out and chassis communications OK Steady Red Light It is likely the module should be replaced See below C AL Flashing Green Light The module is in calibration mode None

Under fault conditions the IF8u will communicate a particular error via a LED blink code. A description of the fault conditions and LED blink codes is listed below...

OK LED CAL LED Fault Status

RE D 3 Blinks Major Nonrecoverable EEPROM Fault. Send in Module for Repair

RE D 4 Blinks Major Nonrecoverable Serial Number not programmed. Send in Module for Repair

RE D 5 Blinks Major Nonrecoverable Boot code section has failed the CRC check. Send in Module for Repair

RE D 6 Blinks Major Recoverable Application code section has failed the CRC check. Try re-programming the module firmware. If condition persists send module in for repair.

RE D 9 Blinks Major Nonrecoverable Module has lost it’s calibration data. Send in Module for repair.

RE D 10 Blinks Major Recoverable Module’s firmware watchdog timer has timed out. Try resetting module. If condition persists send module in for repair.

RE D 11 Blinks Major Nonrecoverable Wrong application installed. Send in Module for Repair .

RE D 12 Blinks Major Recoverable ADC communication fault. Try resetting module. If condition persists send module in for repair .

Note: In RSLogix5000 the Fault Status can be seen in the “Module Info” tab of the module’s properties dialog.

62 ControlLogix™ Universal Analog Input Module

The following LED display is used with ControlLogix analog input modules:

Using RSLogix 5000 to Troubleshoot Your Module

In addition to the LED display on the module, RSLogix 5000 will alert you to fault conditions. You will be alerted in one of three ways:

· W arning signal on the main screen next to the module-This occurs when the connection to the module is broken

· Fault message in a screen’s status line · Notification in the Tag Editor General module faults are also reported in the T ag Editor . Diagnostic faults are only reported in the T ag Editor

· Status on the Module Info Page

The screens below display fault notification in RSLogix 5000.

Chapter 7: Testing Y our Module 63

Fault information on the properties screen.

Determining Fault Type

When you are monitoring a module’s properties dialog in RSLogix 5000 and receive a fault message, the module fault area lists the type of fault.

64 ControlLogix™ Universal Analog Input Module

Module Configuration Errors

The “Additional Fault Code” value details the configuration error if the “(16#0009) module configuration rejected: Parameter Error” was received.

Global Errors

16#0F04 - .ConfigurationRevError

If the .ConfigurationRevNumber tag is 1 and a second owner attempts to connect with a different configuration, this error will occur. You must adjust the second owners configuration to match the first.

16#0F05 - .ConfiguratinRevNumber Error