Rockwell Automation 1797-OE8 User Manual

FLEX Ex Analog Modules

1797-IE8, -IE8NF, and -OE8

User Manual

Important User Information

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.ab.com/manuals/gi) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc. is prohibited.

Throughout this manual we may use notes to make you aware of safety considerations.

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

Identifies information that is critical for successful application and understanding of the product.

Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you:

• identify a hazard

• avoid a hazard

• recognize the consequence

Labels may be located on or inside the equipment to alert people that dangerous voltage may be present.

Labels may be located on or inside the equipment to alert people that surfaces may be dangerous temperatures.

Summary of Changes

The information below summarizes the changes to this manual since the last printing.

To help you find new and updated information in this release of the manual, we have included change bars as shown to the right of this paragraph.

The table below lists the sections that document new features and additional or updated information about existing features.

For this information See

New Related Publications P-2

EMC Directive 3-2

ATEX Directive 3-2

Installation in Zone 1 3-3

Installation in Zone 22 3-3

1797-IE8 and -IE8NF Specifications A-1

1797-IE8 and -IE8NF UL, C-UL I/O Entity Parameters A-4

1797-IE8 and -IE8NF FM I/O Entity Parameters A-7

1797-OE8 Specifications A-10

1797-OE8 UL, C-UL I/O Entity Parameters A-12

1797-OE8 FM I/O Entity Parameters A-15

i Publication 1797-6.5.1 - May 2005

Summary of Changes ii

Notes:

Publication 1797-6.5.1 - May 2005

Tab le of Co nt en ts

Preface

About the FLEX Ex Analog Modules

Why Read This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1

Who Should Read This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1

About the Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1

What This Manual Contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1

For Additional Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-2

Chapter 1

What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

What the FLEX Ex Analog I/O Modules Do . . . . . . . . . . . . . . . . . . 1-1

How FLEX Ex Analog Modules Communicate

with Programmable Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Events following Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Physical Features of Your Analog I/O Module . . . . . . . . . . . . . . . . . 1-3

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Using Alarms on the 1797-IE8 and -IE8NF Modules. . . . . . . . . . . . 1-3

Data Format Alarm Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Overrange Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Underrange Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Remote Fault Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Local Fault Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Understanding Configurable FLEX Ex Analog Module Features

Chapter 2

What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Selecting a 1797-IE8 or -IE8NF FLEX Ex Analog

Input Module’s Operating Features . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Fault Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Remote Transmitter Error Up or Down . . . . . . . . . . . . . . . . . . . 2-3

High Low Error Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Input Filter Cutoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Data Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Selecting a 1797-OE8 FLEX Ex Analog Output

Module’s Operating Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Output Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Local Fault Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Latch Retry Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Global Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Analog Digital State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Analog Fault State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Digital Fault State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Data Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Fault Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

i Publication 1797-6.5.1 - May 2005

How to Install Your FLEX Ex Analog Modules

Understanding Image Table Mapping and Bit/Word Descriptions 2-13

Bit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Analog Input Modules (1797-IE8 and -IE8NF) Image Table

Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Bit/Word Description for the Analog Input Modules

(1797-IE8 and -IE8NF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Analog Output Module (1797-OE8) Image Table Mapping. . . 2-16

Bit/Word Descriptions for the Analog Output Module

(1797-OE8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Chapter 3

What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Before You Install Your Analog Module . . . . . . . . . . . . . . . . . . . . . . 3-1

Compliance to European Union Directives . . . . . . . . . . . . . . . . . . . . 3-2

EMC Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

ATEX Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Installation in Zone 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Installation in Zone 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Electrostatic Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Removal and Insertion Under Power . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Installing the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Mounting on a DIN Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Panel/Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Mounting the Analog Modules on the Terminal Base Unit. . . . . 3-9

Wiring the Terminal Base Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Connecting Wiring to the FLEX Ex I/O Analog Modules. . . . . . . 3-11

Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Connections for the 1797-IE8 and -IE8NF Modules . . . . . . . . 3-11

Connections for the 1797-OE8 Module. . . . . . . . . . . . . . . . . . . 3-13

Grounding the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

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Input, Output, and Configuration Files for the Analog I/O Modules on the ControlNet Network

Calibrating Your Module

iii

Chapter 4

What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Using Programming Software in Your FLEX Ex Application . . . . . 4-2

About the ControlNet Ex Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Communication Over the FLEX Ex Backplane. . . . . . . . . . . . . . . . . 4-3

Scheduled Data-Transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Unscheduled Data-Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Module I/O Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

I/O Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Adapter Status Word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

Fault State Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Device Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Communication Fault Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Idle State Behavior. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Input Data Behavior upon Module Removal. . . . . . . . . . . . . . . . 4-8

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Chapter 5

What This Chapter Contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

When and How to Calibrate Your FLEX Ex Analog I/O Module . 5-1

Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Using Calibration Module Command Words . . . . . . . . . . . . . . . . . . . 5-2

Typical MODULE Calibration Command Word . . . . . . . . . . . . 5-3

Calibrating the Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Calibrating the Output Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Applying FLEX Ex Analog I/O Modules

Chapter 6

What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Evaluate the Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Define the Area Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Decide Classification Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Determine Hazard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Determine Temperature Rating . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Select Protection Method(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

Match Field Devices and I/O Modules . . . . . . . . . . . . . . . . . . . . . . . 6-3

P/I Analog Transmitter Functional and IS Parameters. . . . . . . . 6-3

1797-IE8 and -IE8NF Functional and IS Parameters . . . . . . . . . 6-4

Loop Functionality Verification . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

Intrinsic Safety Entity Verification . . . . . . . . . . . . . . . . . . . . . . . . 6-6

I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Optimize Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Assigning Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

Power Supply Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Publication 1797-6.5.1 - May 2005

Troubleshooting the FLEX Ex Analog I/O Modules

Specifications

Chapter 7

What this Chapter Contains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Status Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

1797-IE8 and -IE8NF Modules . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

1797-OE8 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Appendix A

1797-IE8 and -IE8NF Input Modules . . . . . . . . . . . . . . . . . . . . . . . A-1

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

1797-IE8 and -IE8NF CE, CENELEC I/O Entity Parameters A-3

1797-IE8 and -IE8NF UL, C-UL I/O Entity Parameters . . . . A-4

1797-IE8 and -IE8NF FM I/O Entity Parameters . . . . . . . . . . A-7

1797-OE8 Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

1797-OE8 CENELEC I/O Entity Parameters . . . . . . . . . . . . A-11

1797-OE8 UL, C-UL I/O Entity Parameters . . . . . . . . . . . . . A-12

1797-OE8 FM I/O Entity Parameters . . . . . . . . . . . . . . . . . . . A-15

Index

Publication 1797-6.5.1 - May 2005

Preface

Why Read This Manual

Who Should Read This Manual

About the Vocabulary

What This Manual Contains

This manual shows you how to use your FLEX Ex™ analog modules with the ControlNet Ex install, program, and troubleshoot your module.

You must be able to program and operate a ControlNet Ex product and ControlNet

In this manual, we refer to the:

• 1797-IE8 and -IE8NF as the “input modules”

• 1797-OE8 as the “output module”

The following chart lists each chapter with its corresponding title and a brief overview of the topics covered in that chapter.

Chapter Title Contents

™ products and ControlNet network. The manual helps you

™ network to make efficient use of a FLEX Ex module.

1 About the FLEX Ex Analog Modules Describes module functionality and

physical features

2 Understanding Module Features Describes configurable module

features and configuration bits

3 How to Install Your Analog Module How to install and wire the modules

4 Input, Output and Configuration Files

for the Analog I/O Modules on the ControlNet network

5 Calibrating Your Module Lists the tools needed, and the

6 Applying FLEX Ex Analog I/O

Modules to the System

7 Troubleshooting Your Module How to use the indicators to

Appendix Title Contents

A About the Specifications Outlines module specifications and

B Programming the FLEX Ex I/O

Modules Using RIO

Describes how to use these I/O modules over the ControlNet network

methods used to calibrate the module

Describes how FLEX Ex is different from traditional control systems

troubleshoot your module

accuracy

Explains how to program the analog modules

1 Publication 1797-6.5.1 - May 2005

Preface 2

For Additional Information

For additional information on FLEX Ex systems and modules, refer to the following documents.

Catalog Number

1797 Series FLEX Ex Selection Guide 1794-SG002

1797 Series ControlNet Ex System Cable Guide 1797-6.2.1

1797-TB3 FLEX Ex Terminal Base

1797-TB3S FLEX Ex Spring Clamp Terminal Base

1797-OE8 FLEX Ex 8 Output Analog Module

1797-OE8H FLEX Ex HART 8 Ouput Analog

Module

1797-IRT8 FLEX Ex RTD/Thermocouple/mV

Module

1797-IE8 FLEX Ex 8 Input Analog Module

1797-IE8NF FLEX Ex 8 Input Analog Module with

Noise Filter

1797-IE8H FLEX Ex HART 8 Input Analog Module 1797-6.5.3

1797-OB4D 4 Output Module 1797-5.6

Description

Installation Instructions

1797-5.1

1797-5.3

1797-5.4 1797-6.5.2

1797-5.5

Publications

User Manual

1797-6.5.1

1797-6.5.3

1797-6.5.1

1797-IBN16 FLEX Ex NAMUR Digital Input Module 1797-5.7

1797-PS2E2 FLEX Ex Power Supply 1797-5.8

1797-IJ2 2 Frequency Input Module 1797-5.9 1797-6.5.4

1797-PS2N2 FLEX Ex Power Supply 1797-5.12

1797-BIC FLEX Ex Bus Isolator

1797-CEC FLEX Ex Flexbus Connector

1797-ACNR15 ControlNet Ex Adapter 1797-5.14

1797-RPA,

-RPFM

1797-TPR,

- TPRS, -TPYR,

-TPYS

1797-CE1S,

-CE3S, -CEFTN,

-CEFTE

1797-EXMK Marker Kit 1797-5.23

1797-PS1E FLEX Ex Power Supply 1797-5.33

1797-PS1N FLEX Ex Power Supply 1797-5.34

1797-BCNR FLEX Ex Redundant ControlNet

Fiber Hub

FLEX Ex Taps

Interconnect Cables

Barrier Module

1797-5.13

1797-5.15

1797-6.2.1

1797-5.18

1797-5.20

1797-5.35

Publication 1797-6.5.1 - May 2005

Chapter

About the FLEX Ex Analog Modules

What this Chapter Contains

What the FLEX Ex Analog I/O Modules Do

Read this chapter to familiarize yourself with the input and output analog modules.

For information on: See page:

What the FLEX Ex Analog I/O Modules Do

How FLEX Ex Analog Modules Communicate with Programmable Controllers

Physical Features of Your Analog I/O Module

Chapter Summary 1-6

The 1797-IE8 and -IE8NF modules accept up to 8 analog inputs. The inputs are non-isolated and will accept current in either of the following two ranges: 4-20mA or 0-20mA. The default input range is 0-20mA. The inputs have both fixed hardware filters and selectable firmware digital filters.

Similarly, the 1797-OE8 module provides as many as 8 analog outputs. The outputs are nonisolated and will provide current in either of the following two ranges: 4-20mA or 0-20mA. The default output range is 0-20mA.

1-1

1-2

1-3

Each module offers:

• local microprocessor intelligence for advanced features

• full functionality without switches or jumpers

• multiple data ranges that can be independently programmed

in channel groups

• lead breakage detection

• overrange/underrange alarms

• remote transmitter alarm

as well as a host of other module features.

1 Publication 1797-6.5.1 - May 2005

1-2 About the FLEX Ex Analog Modules

How FLEX Ex Analog Modules Communicate with Programmable Controllers

FLEX Ex analog I/O modules provide best utility when used with ControlNet Ex products on the ControlNet network. Data connections are established between the I/O module and an Allen-Bradley programmable controller to transfer information between the two at a scheduled rate.

Input module information is then automatically made available in the PLC data table through the data connection. Reciprocally, output data information determined by the PLC program is also automatically transferred from the PLC data table to the output module through the data connection.

In addition, when the data connection is originally established, configuration information for the module is automatically transferred to it via the network.

Events following Power-Up

You must apply intrinsically safe +/-V power to your FLEX Ex analog I/O modules. The following sequence of events occurs after power has initially been applied to your module:

1. The module begins an internal diagnostic check. The channel 0 LED indicator turns ON to indicate the check has begun. The indicator turns OFF when the check is finished.

2. After the diagnostic check, module configuration information, selected by the user and downloaded over the network, is applied by the module.

For more information on configuration options, see Chapter 2.

3. Following the module configuration download for the 1797-IE8 or

-IE8NF modules, the module begins producing runtime data for the

PLC.

Following the module configuration download for the 1797-OE8

module, the module applies configuration data to output channels.

4. If any diagnostics or alarms are generated during normal module

operation, the data is returned to the PLC.

Publication 1797-6.5.1 - May 2005

About the FLEX Ex Analog Modules 1-3

Physical Features of Your Analog I/O Module

The module label identifies the keyswitch position, wiring and module type. Use the removable label to note individual designations per your application.

Indicators

Indicators are provided to identify input or output fault conditions, and to show when power is applied to the module. For example, the 1797-IE8 module is shown below.

1797-IE8

Module Type

Removable Label

8 CHANNEL ANALOG INPUT

IN1IN0 IN2 IN3 IN4

IN5

1797-IE8

IN6 IN7

PWR

Keyswitch Position

Indicator (#3)

Power On Indicator

Using Alarms on the 1797-IE8 and -IE8NF Modules

Input Designators

40070

The 1797-IE8 and -IE8NF FLEX Ex modules are capable of generating four alarms:

• Underrange

• Overrange

• Remote Fault

• Local Fault

These alarm conditions are described in general terms and as they relate to bits on the FLEX Ex I/O module on the following pages. The following graphic shows at what values these alarms are generated for Data Format 4.

Publication 1797-6.5.1 - May 2005

1-4 About the FLEX Ex Analog Modules

0mA 4mA 20mA 22mA

Data Format Alarm Example

In this example, the normal active data range is 4-20mA. The alarms are generated in three overlapping bands.

PHYSICAL INPUT SIGNAL RANGE

underrange overrange

remote fault remote fault

local fault

-25.00%

-12.50%

programmable

in 20 0.1mA

steps by Error

Level 0.1mA

Steps

parameter

0.00%

Remote Transmitter Error

Up/Down parameter

determines which of these

is active

100.00% 112.50%

programmable

in 20 0.1mA

steps by Error

Level 0.1mA

Steps

parameter

Overrange Alarm

The Overrange alarm notifies you when module input is overrange. When the input signal exceeds 100% (20mA), an Overrange Alarm is generated.

This alarm stays active at any value above 100% of range and is always enabled by the module.

Underrange Alarm

41666

Publication 1797-6.5.1 - May 2005

The Underrange alarm works in a fashion converse to the overrange. This feature notifies you when the input signal falls underrange. If the input signal falls below 0% (4mA), an Underrange Alarm is generated.

This alarm stays active at any value below 0% of range and is always enabled by the module.

About the FLEX Ex Analog Modules 1-5

Remote Fault Alarm

The Remote Fault Alarm is primarily intended for use with remote transmitter loops.

For example, the remote transmitter may be measuring temperature and converting it to a standard mA signal. In such a loop, though, the input module cannot determine the state of the loop on the far side of the transmitter. However, the remote transmitter may be capable of diagnosing a problem in the remote loop and signal the input module local loop with a preprogrammed out of range (high or low) value.

The Remote Fault Alarm allows the 1797-IE8 and -IE8NF modules to work with transmitters like the one just described. You must use the Remote Transmitter Error Up or Down feature, see page 2-3, to configure your application for Remote Fault notification.

For example, you must determine if you want a remote fault to cause high out of range values or low out of range values to be returned to the controller.

IMPORTANT

Once the alarm is issued, it remains active as long as the input signal value remains above the programmed value.

Using Remote Fault Alarm to Determine High High or Low Low Alarm Levels

If you do not have a remote transmitter in your loop, this alarm can also be used to program a high high or low low alarm level between the levels which actuate the overrange or underrange alarms and the high or low local fault alarms.

IMPORTANT

When establishing high high or low low alarms, you can only select one side (high or low). You must use the Remote Transmitter Error Up or Down feature in conjunction with this alarm.

Publication 1797-6.5.1 - May 2005

1-6 About the FLEX Ex Analog Modules

Programming the Remote Fault Alarm

For the Remote Fault alarm, you must program the threshold in 0.1mA steps at any level on the high or low end of input signal range. The Remote Fault alarm activates if your I/O module receives input signal values of:

• 100.63% (20.1mA) to 111.88% (21.9mA) on the high end of input

signal range

• -0.63% (3.9mA) to -11.88% (2.1mA) on the low end of input

signal range

IMPORTANT

This alarm is only active for one band, either on the high side of normal operation or the low side.The Remote Transmitter Error Up/Down parameter determines which side is active. See page 2-3 for a description of the Remote

Transmitter Error Up/Down feature.

Local Fault Alarm

The Local Fault alarm notifies you when the loop to the transmitter or field device, if no transmitter is used, is open or shorted.

IMPORTANT

• 112.50% (22mA) or higher on the high end of input signal range - This

value indicates a short in the loop.

Once the alarm is issued, it remains active as long as the input signal value remains in the programmed range.

Chapter Summary

Publication 1797-6.5.1 - May 2005

• -12.50% (2mA) or lower on the low end of input signal range - This

value indicates an open wire condition in the loop.

The Remote Fault and Local Fault alarms are issued with the same bit whether the cause is an under or overrange. Monitor the Overrange and Underrange bits in your programming software to determine if the problem is a high current or low current.

In this chapter, you learned what FLEX Ex analog I/O modules do. Move on to Chapter 2 to learn about configurable features on your module.

Chapter

Understanding Configurable FLEX Ex Analog Module Features

What this Chapter Contains

Read this chapter to familiarize yourself with configurable features on the input and output analog modules.

For information on: See page:

Selecting a 1797-IE8 or -IE8NF FLEX Ex Analog Input Module’s Operating Features

Selecting a 1797-OE8 FLEX Ex Analog Output Module’s Operating Features

Understanding Image Table Mapping and Bit/Word Descriptions

Chapter Summary 2-18

Use the table below to see what features this chapter describes.

Table 2.1 Configurable Features on the FLEX Ex Analog I/O Modules

1797-IE8 and -IE8NF input module features:

Fault Mode Output Enable

Remote Transmitter Error Up or Down Module Fault State Mode

2-2

2-7

2-13

1797-OE8 output module features:

High Low Error Level Local Fault Mode

Input Filter Cutoff Digital Output

Data Format Latch Retry Mode

Global Reset

Analog Digital State

Analog Fault State

Digital Fault State

Data Format

Fault Alarm

1 Publication 1797-6.5.1 - May 2005

2-2 Understanding Configurable FLEX Ex Analog Module Features

You must use the I/O configuration portion of your PLC programming software to select and configure these features. This manual assumes familiarity with the programming software. A brief description of each module feature is provided here. For more information on your programming software, see the software user manual.

Selecting a 1797-IE8 or

-IE8NF FLEX Ex Analog Input Module’s Operating Features

All features of the 1797-IE8 and -IE8NF analog input modules are independently configurable in two four-channel groups (channel 0-3 & channel 4-7).

IMPORTANT

The default selection value for all parameters is 0.

Fault Mode

Your input modules are capable of indicating various fault conditions, depending on the input signal value. Use the Fault Mode feature to enable or disable two alarms:

• Remote Fault alarm

• Local Fault alarm

Use your programming software to set the Fault Mode bit to 0 to disable these alarms. Set the bit to 1 to enable them.

Publication 1797-6.5.1 - May 2005

IMPORTANT

For more information on Remote and Local Fault alarms, see page 1-5.

Fault Mode will only enable or disable the Remote and Local Fault alarms. It does not affect the Underrange and Overrange alarms. They are always active.

Understanding Configurable FLEX Ex Analog Module Features 2-3

Remote Transmitter Error Up or Down

A second feature of your input modules that affects use of the Remote Fault alarm is the Remote Transmitter Error Up or Down feature. Used in conjunction with the High Low Error level, this feature designates whether remote faults are displayed with input signal readings beyond the high or low signal levels normally used by the module.

When setting the Remote Transmitter Error Up or Down feature in your programming software, set this feature’s bit to 0 to select up. Set the bit to 1 to select down.

For more information on Remote and Local Fault alarms, see page 1-5.

High Low Error Level

High Low Error level sets the high and low signal levels at which your input modules will indicate a signal fault. This feature works in conjunction with the Remote Transmitter Error Up or Down.

If the Remote Fault Alarm feature is enabled and a remote fault occurs, the module will detect and report the fault, depending on how the High Low Error level is configured.

Use your programming software to set the high or low error levels.

Input Filter Cutoff

Eight available input filter settings allow you to choose the best rolloff frequency for input channels on your I/O module. When choosing a filter, remember that time filter selection affects your input signal’s accuracy.

For example, if you choose the highest frequency of 1200Hz (filter 0), signal noise is more likely to affect the reading, but the slowest frequency of 0.5Hz (filter 7) provides the most accurate signal due to incoming noise filtering.

See Table 2.2 to decide which input filter to use in your FLEX Ex analog I/O application:

Table 2.2 Input Filter Frequency

Filter:76543210

1797-IE8 Frequency:

1797-IE8NF Frequency:

0.5Hz (2s) 1Hz (1s) 2Hz (500ms) 4Hz (250ms) 10Hz (100ms) 20Hz (50ms) 40Hz (25ms) 1200Hz (0.8ms)

Reserved

Choose the best input filter cutoff in your programming software.

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2-4 Understanding Configurable FLEX Ex Analog Module Features

(

)

(

)

Data Format

You must choose a module data format in your user prog ram. See Table 2.3 on page 2-4 for an explanation of each bit. Formats 8, 9, 10 and 15 are not used. If they are selected for a channel quad, a configuration fault will occur and will be reported as Diagnostic Data “2”. All data for that channel quad will be set to zero (0).

When using Table 2.3, remember the following:

• Formats 5, 12, 13 and 14 are 2’s complement data formats, and will

return data in that form.

• 12 Formats are available

• Default format is 0-20mA

• The data format selected interprets input readings and returns them to

the PLC

Data Format

Format Resolution Input

0 0-20mA as mA0.1% of

1 0-20mA as %0.2% of

2 0-20mA

as √%

3 0-20mA as

unsigned integer

4 4-20mA as mA0.1% of

0-20mA

0.19% of 0-20mA

0.03% of 0-20mA

4-20mA

Table 2.3 1797-IE8 and -IE8NF Data Formats

Module Data Processing Data Table Value

Range

0-22mA datatable = 1,000 (input) 0-22000

0-22mA 0-11000

0-22mA 0-10488

0-20mA 0-65,535

2-22mA datatable = 1,000 (input) 2000-22000

datatable = 10,000

IF . . . Square_Root_Threshold

< 10,000

Else . . . datatable = 0

datatable = 65,535

√

input

√

input

(interpretation)

(0-22.000mA)

(0-110.00%)

(0-104.88%)

(0-22mA)

(2.000-22.000mA)

Count per mA

1000 with

500 with

524 with

3276 with

1000 with

Error Steps

error steps

Publication 1797-6.5.1 - May 2005

Understanding Configurable FLEX Ex Analog Module Features 2-5

(

)

(

)

(

)

(

)

(

)

(

)

Table 2.3 1797-IE8 and -IE8NF Data Formats

Data Format

Format Resolution Input

Range

5 4-20mA as %0.16% of

4-20mA

6 4-20mA

as √%

7 4-20mA as

unsigned integer

8 0-20mA not assigned all fixed

9 0-20mA not assigned all fixed

10 0-20mA not assigned all fixed

11 0-20mA as

A/D count

12 4-20mA as %0.16% of

0.17% of 4-20mA

0.03% of 4-20mA

0.04% of 0-20mA

4-20mA

2-22mA -1250 - +11250

4-22mA 0-10607

4-20mA 0-65,535

0-22mA 0-55000

3.6-21mA -250 - +10625

Module Data Processing Data Table Value

(interpretation)

√

input-4

input

input-4

(2’s complement) (-12.50% +112.50%)

(0-106.07%)

(4-20mA)

(0-22mA)

( 2 ’ s c o m p l e m e n t ) (-2.50% +106.25%)

datatable = 10,000

IF . . . Square_Root_Threshold

< 10,000

Else . . . datatable = 0

datatable = 65,535

datatable = 55,000

datatable = 10,000

√

Count per mA

625 with

589 with

4095 with

2500 all fixed

625 NAMUR

Error Steps

error steps

error steps, underrange not allowed

error steps

NE 4 all fixed

13 4-20mA

as %

14 4-20mA

as %

15 4-20mA not assigned all fixed

0.16% of 4-20mA

3-21mA -625 - +10625

2-22mA -1250 - +11250

datatable = 10,000

input-4

( 2 ’ s c o m p l e m e n t ) (-6.25% +106.25%)

( 2 ’ s c o m p l e m e n t ) (-12.50% +112.50%)

625 all fixed

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2-6 Understanding Configurable FLEX Ex Analog Module Features

Data Formats and Error Ranges

The graphic below shows the data formats and error ranges for your FLEX Ex analog I/O modules.

PHYSICAL INPUT SIGNAL RANGE

0mA 20mA 22mA

normal signal range overrange

Format 0 Format 1 Format 2 Format 3

Format 4 Format 5 Format 6 Format 7

Format 8 Format 9 Format 10 Format 11

0.00mA

0.00%

0.00% 0

0mA 20mA 22mA

underrange

remote fault

local fault

2mA

-12.50%

0.00mA

-25.00%

0mA 20mA 22mA

2mA 2mA

programmable

in 20

0.1mA steps

normal signal range

4.00mA

0.00%

0.00% 0

Not assigned Not assigned Not assigned

20.00mA

100.00%

100.00% 65,535

20.00mA

100.00%

100.00% 65,535

50,000 55,00055,000

programmable

0.1mA steps

programmable

0.1mA steps

in 20

overrange

in 20

overrange

remote fault

22.00mA

110.00%

104.88% 22mA

remote fault

22.00mA

112.50%

106.07% 22mA

remote fault

local fault

0mA 20mA 22mA

Format 12 Format 13 Format 14 Format 15

-25.00%

Publication 1797-6.5.1 - May 2005

remote fault

-12.50%

underrange

local fault

-2.50%

-6.25%

-12.50%

normal signal range

Not assigned

-0.00%

100.00%

overrange

106.25%

112.50%

remote fault

112.50%

local fault

41667

Understanding Configurable FLEX Ex Analog Module Features 2-7

Selecting a 1797-OE8 FLEX Ex Analog Output Module’s Operating Features

All features of the 1797-OE8 analog output module are independently configurable in two four-channel groups (channel 0-3 & channel 4-7).

IMPORTANT

The default selection value for all parameters is 0.

Output Enable

The Output Enable feature provides user control of the FLEX Ex I/O module’s output channels.

At power-up, the ControlNet Ex adapter (1797-ACNR15) and the FLEX Ex I/O modules use a default state of no communications over the network. Use your programming software to change the Output Enable bit to 1 to begin communications over the network.

If network communication is ever lost during normal operations, the adapter resets the Output Enable bit to 0, and any connected I/O modules execute their fault routine, including transitioning to fault state and setting outputs to a user-defined fault state. When network communications resume, the adapter sets the Output Enable bit to 1 and normal I/O operations continue.

Local Fault Mode

The Local Fault Mode can be programmed to determine how the module responds to communications faults and internal module faults.

When setting the Local Fault Mode feature in your programming software, set this feature’s bit to 0 to use the analog fault state or digital fault state only if a communications fault occurs. Set the bit to 1 to use the analog fault state or digital fault state if any fault occurs.

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2-8 Understanding Configurable FLEX Ex Analog Module Features

Latch Retry Mode

Latch Mode determines channel operation under wire off or lead break fault conditions. This feature controls the operation of two channel groups, channels 0-3 and channels 4-7. Channel detection occurs on a continuous basis. If a fault is detected, the channel fault alarm is set.

If Latch Mode is enabled when a fault occurs, the fault will remain latched in its fault state until a Global Reset (see below) is issued. If Latch Mode is disabled when a fault occurs, the channel reports a fault until the fault is corrected. Global Reset is not necessary if Latch Mode is disabled.

When using your programming software, set the Latch Mode bit to 0 to disable the feature. Set the bit to 1 to enable it.

Global Reset

Global Reset works in conjunction with Latch Mode during fault conditions. If Latch Mode is enabled and a fault condition occurs, the channel operating with a fault remains in this condition (with analog or digital fault state implied) until a Global Reset is issued. The Global Reset feature resets all outputs of a particular channel group to accept normal system output data.

The Global Reset feature is an edge triggered signal. Use your programming software to set the Global Reset bit to 1 for normal operation. Resetting of outputs occurs during the 1 to 0 transition.

Analog Digital State

You can configure your FLEX Ex analog I/O modules to work in an analog mode or digital mode using the Analog Digital State feature. Depending on which state you choose for your application, additional parameters (see the descriptions of Analog Fault State and Digital Fault State on page 2-9) must be configured for your module to react to fault conditions.

Set the Analog Digital State bit in your programming software to 0 for your module to operate in an analog state. Set the bit to 1 for your module to operate in a digital state. A selection bit is available to each channel.

Publication 1797-6.5.1 - May 2005

Understanding Configurable FLEX Ex Analog Module Features 2-9

Analog Fault State

The Analog Fault State feature determines how your I/O module reacts to faults when a channel is used in analog mode. After a fault condition occurs, the module may got to minimum value, maximum value, hold last state or 50% of range.

Use your programming software to set the Analog Fault State bits on the I/O module for one of the following fault reactions:

• 0 = minimum value

• 1 = maximum value

• 2 = hold last state

• 3 = 50% of range

You can set these parameters independently for channels 0-1, 2-3, 4-5, 6-7.

Digital Fault State

The Digital Fault State feature determines how your I/O module reacts to faults when a channel is used in digital mode. After a fault condition occurs, the module may reset channel outputs or hold last state of the outputs.

Use your programming software to set the Digital Fault State bit to 0 to reset outputs. Set to 1 to hold last state of the outputs after a fault occurs. This feature is available on a per channel basis.

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2-10 Understanding Configurable FLEX Ex Analog Module Features

Data Format

You must choose a module data format in your user prog ram. See Table 2.4 on page 2-11 for an explanation of each bit. Data Formats 2, 5, 6, 8, 9, 10, 12 and 15 are not assigned.

When choosing a data format, remember the following:

• If a non-assigned Analog Data Format is selected, the module sets

Diagnostic Data to “2” for configuration failure and puts affected channels affected in the corresponding fault state.

• An unconfigured module channel pair can be assumed to have the

default configuration Analog Data Format “0”, 0-20mA and Analog Mode Fault State “minimum range”. If a non-assigned format is selected, then the diagnostic “2” for configuration failure is set and the module channel pair goes to the default fault state minimum range.

• If on the other hand, the configuration had been changed, from the

default, and then it was changed again to a non-assigned format, then the diagnostic bit “2” for configuration failure is set and the module goes to the fault state for the last valid configuration.

• Formats 13 and 14 are 2’s complement data formats, and require data to

the module in that form.

• Range: 0-15, See Table 13

• Default: 0

• Data Table Reference: data format, word 12 and 13, bits 0-3, bits 4-7

If data is sent to the module which is out of range, the value will be clipped and Diagnostic Data will be set to “11” data out of range. See the graphic below.

datatable

20.000

16.000

12.000

8.000

4.000

Diagnostic Data error 11=data out of range

Publication 1797-6.5.1 - May 2005

Diagnostic Data error 11=data out of range

0.000

-4.000 0 4 8 12 16 20 24

Output mA

Understanding Configurable FLEX Ex Analog Module Features 2-11

(

)

(

)

(

)

(

)

(

)

Table 2.4 1797-OE8 Data Formats

Data Format

0 mA as

1 % as

2 0-20mA 0-22mA not assigned

3 unsigned

4 mA as

5 4-20mA 4-20mA not assigned

Format Resolution Full

Output Range

0-20mA

integer as 0-20mA

4-20mA

0.1% of 0-20mA

0.2% of 0-20mA

0.03% of 0-20mA

0.1% of 4-20mA

0-22mA 0-22000

0-22mA 0-11000

0-20mA 0-65,535

2-22mA 2000-22000

Module Data Processing Data Table Value

output =

output = 20

output =

datatable

1,000

datatable

10,000

datatable

65,535

datatable

1,000

(Interpretation)

(0-22.000mA)

(0-110.00%)

(0-22mA)

(2.000-22.000mA)

Count per mA

1000 min=0mA

500 min=0mA

3276 min=0mA

1000 min=2mA

Analog Fault State

max=22mA hold last=hold 50%=11mA

max=20mA hold last=hold 50%=10mA

max=22mA hold last=hold 50%=12mA

6 4-20mA 4-20mA not assigned

7 unsigned

integer as 4-20mA

8 0-20mA 0-20mA not assigned

9 0-20mA 0-20mA not assigned

0.03% of 4-20mA

4-20mA 0-65,535

output = 16

datatable

65,535

+ 4

(4-20mA)

4095 min=4mA

max=20mA hold last=hold 50%=12mA

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2-12 Understanding Configurable FLEX Ex Analog Module Features

(

)

(

)

(

)

Table 2.4 1797-OE8 Data Formats

Data Format

10 0-20mA 0-20mA not assigned

11 D/A count

12 4-20mA not assigned

13 % as

14 % as

15 4-20mA 4-20mA not assigned

Format Resolution Full

Output Range

as 0-20mA

4-20mA

0.28% of 0-20mA

0.16% of 4-20mA

0-22mA 0-8000

3-21mA -625 - +10625

2-22mA -1250 - +11250

Module Data Processing Data Table Value

output = 22

output = 16

datatable

8,000

datatable

10,000

datatable

10,000

+ 4

(Interpretation)

(0-22mA)

( 2 ’ s c o m p l e m e n t ) (-6.25% +106.25%)

( 2 ’ s c o m p l e m e n t ) (-12.50% +112.50%)

Count per mA

363 min=0mA

625 min=3mA

625 min=2mA

Analog Fault State

max=22mA hold last=hold 50%=11mA

max=21mA hold last=hold 50%=12mA

max=22mA hold last=hold 50%=12mA

Fault Alarm

Fault Alarm selects whether the channel pair fault detection is enabled or disabled. There is a 100Hz (10ms) filter for wire off/lead break detection.

Use your programming software to set the Fault Alarm. Set the feature bit to 0 to disable the alarm. Set the bit to 1 to enable wire off/lead break fault detection.

Publication 1797-6.5.1 - May 2005

Understanding Configurable FLEX Ex Analog Module Features 2-13

Understanding Image Table Mapping and Bit/Word Descriptions

Bit Descriptions

Use the table below to understand bits used in image table mapping and bit/word descriptions. Complete definitions of these feature documented below can be found in Chapter 2.

Table 2.5 Bit/Word Descriptions

Bit: (s): Location: Definition:

Ch 1797-IE8 and -IE8NF Input and output maps

1797-OE8 Input and output maps

Ovr Alm 1797-IE8 and -IE8NF Input map Overrange Alarm

Und Alm 1797-IE8 and -IE8NF Input map Underrange Alarm

Rm Flt 1797-IE8 and -IE8NF Input map Remote Fault

Lo Flt 1797-IE8 and -IE8NF Input map Local Fault

Res Flg 1797-IE8 and -IE8NF Input map

1797-OE8 Input map

Out Enbl 1797-OE8 Output map Output Enable

U/D 1797-IE8 and -IE8NF Output map Up/down

Flt Md 1797-IE8 and -IE8NF Output map Fault Module

Cd Flg 1797-IE8 and -IE8NF Output map

1797-OE8 Output map

Channel

Response Flag

Command Flag

Flt Alm 1797-OE8 Input map Fault Alarm

Glbl Rst 1797-OE8 Output map Global Reset

Lo Flt Md 1797-OE8 Output map Local Fault Module

Alg Flt Ste 1797-OE8 Output map Analog Fault State

Lth Rty 1797-OE8 Output map Latch Retry

Dig Flt Ste 1797-OE8 Output map Digital Fault State

Alg Dig Md 1797-OE8 Output map Analog Digital Module

Diagnostic Status

1797-IE8 and -IE8NF Input map 1797-OE8 Input map

Diagnostic Status

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2-14 Understanding Configurable FLEX Ex Analog Module Features

Analog Input Modules (1797-IE8 and -IE8NF) Image Table Mapping

Table 2.6 Input Map (Read Words)

Bit

→

Word

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

↓

Read

0 Channel 0 Input Data 1 Channel 1 Input Data 2 Channel 2 Input Data 3 Channel 3 Input Data 4 Channel 4 Input Data 5 Channel 5 Input Data 6 Channel 6 Input Data 7 Channel 7 Input Data

Und

Ovr

Alm

Flt ch

Ovr

Alm

Flt ch

Alm

Flt ch

Alm

Flt ch

Alm

Flt ch

Alm

Flt ch

Alm

Flt ch

Alm

Flt ch

Alm

Lo Flt ch

Alm

Lo Flt ch

Alm

Lo Flt ch

Alm

Lo Flt ch

Alm

Lo Flt ch

Alm

Lo Flt ch

8Ovr

9Rm

10 Diagnostic Status 11 Res

Module command response Module response data

Flg

Where: ch = channel

Ovr Alm = Overrange Alarm Und Alm = Underrange Alarm Rm Flt = Remote Fault Lo Flt = Local Fault Res Flg = Response Flag

Und Alm

Lo Flt ch

Und Alm

Lo Flt ch

Table 2.7 Output Map (Write Words)

Bit →

Word

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

↓

0 High and Low Error Level U/D

1 High and Low Error Level U/D

2Cd

Module command Module command data

Flg

Where: Out Enbl = Output Enable

U/D = up/down Flt Md = Fault Module Cd Flg = Command Flag

Publication 1797-6.5.1 - May 2005

0-3

Write

Filter Cutoff 0-3 Data Format Flt

+ 74 hidden pages