Allen-Bradley 1794-OA8K Owners Manual

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Page 1

User Manual

FLEX I/O Isolated Input/Output HART Analog Modules

Catalog Numbers

1794-IF8IH, 1794-IF8IHNFXT, 1794-OF8IH

Page 2

Important User Information

IMPORTANT

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 your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/ 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, when necessary, we use notes to make you aware of safety considerations.

WARNING: 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.

available from

) describes some

ATTENTION: 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, and recognize the consequence

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.

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

Allen-Bradley, Rockwell Software, Rockwell Automation, Micro800, Micro830, Micro850, Connected Components Workbench, and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Page 3

Preface

Why Read This Manual

Who Should Use This Manual

About the Vocabulary

This manual shows you how to use your FLEX I/O analog modules with the ControlNet products and ControlNet network, and Ethernet products and Ethernet network. The manual helps you install, program, and troubleshoot your module. This manual:

You must be able to program and operate a ControlNet product and ControlNet or Ethernet network to make efficient use of a FLEX I/O module.

In this manual, we refer to the:

• 1794-IF8IH and 1794-IF8IHNFXT as the input modules

• 1794-OF8IH as the output module

Summary of Changes

This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.

New and Updated Information

This table contains the changes made to this revision.

Topic Page

Addition of 1794-IF8IHNFXT Module 1

1794-IF8IHNFXT Analog Data Table 13

1794-IF8IHNFXT Output Analog Data Table 13

Data Formats 9

Configuration Parameters for 1794-IF8IHNFXT 31

Configuration Parameter Descriptions for 1794-IF8IH and 1794-IF8IHNFXT 32

Primary Input Data (RTD Input Data) for 1794-IF8IH and 1794-IF8IHNFXT 45

Secondary Input Data (Cyclic EDT Input Data) for 1794-IF8IH and 1794IF8IHNFXT

Edit Your 1794-IF8IHNFXT Configuration with Logix Designer (Full Profile) 76

1794-IF8IHNFXT EDT IO Profile 28

1794-IF8IHNFXT Configuration Data Table 31

1794-IF8IHNFXT Channel Data Formats 39

1794-IF8IHNFXT Channel Digital Filter 36

1794-IF8IHNFXT Data Formats Full Reporting Range 39

Diagnostic Status for 1794-IF8IH and 1794-IF8IHNFXT 46

Secondary Input Data (Cyclic Input Data) for the 1794-IF8IH and 1794IF8IHNFXT Modules

Use RSNetWorx to Send and Receive CIP MSG Instructions 89

1794-IF8IHNFXT Get Device Information Block 1 Message – Request Packet Structure

1794-IF8IHNFXTHART Get Device Information Block 1 – Reply packet structure

Use the 1794-IF8IHNFXT with the Generic and Thin Profiles 135

Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

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vi Summary of Changes

Notes:

Publication 1794-UM065C-EN-E - June 2014

Page 7

About the FLEX I/O HART Analog Modules

Table of Contents

Preface

Why Read This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Who Should Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

About the Vocabulary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Related Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Common Techniques Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . iii

New and Updated Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Chapter 1

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

What FLEX I/O Analog Modules Do. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Communicate with Programmable Controllers . . . . . . . . . . . . . . . . . . . . . . 2

Events Following Powerup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Use Alarms on the Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Low Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

High Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Remote Fault Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Local Fault Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Use the HART Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

HART Implementation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Configurable FLEX I/O Analog Module Features

Install Your FLEX I/O Analog Modules

Chapter 2

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Select Your Analog Input Module Operating Features. . . . . . . . . . . . . . . . 8

Fault Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Sample Filter Frequency Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Select Your Analog Output Module Operating Features . . . . . . . . . . . . . . 9

Local Fault Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Latch Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Global Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Fault Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Understand Image Table Mapping and Bit/Word Descriptions . . . . . . 12

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Chapter 3

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Before You Install Your Analog Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Removal and Insertion Under Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Install the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Mount on a DIN Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Mount on a Panel or Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

viiRockwell Automation Publication 1794-UM065C-EN-E - June 2014

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Configuration

Mount the Analog Modules on the Terminal Base Unit. . . . . . . . . . 20

Wire the Terminal Base Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Connect Wiring to the FLEX I/O HART Analog Modules. . . . . . . . . . 22

Ground the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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

Chapter 4

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Data Transfer Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Configuration Parameters for 1794-IF8IH . . . . . . . . . . . . . . . . . . . . . . . . . 29

Configuration Parameters for 1794-IF8IHNFXT. . . . . . . . . . . . . . . . . . . 31

Configuration Parameter Descriptions for 1794-IF8IH and

1794-IF8IHNFXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Byte Order (Configuration Word 0 – bits 0…1, 8…9). . . . . . . . . . . . 32

Fault Mode (Configuration Word 0, bits 2…5, 10…13) . . . . . . . . . . 35

Digital Filter (Configuration Words 4…7 – bits 0…2, 8…10) . . . . . 35

Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…11,

12…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Remote Low Low Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Remote High High Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Low Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

High Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

HART Disable Channel 0…7 (Configuration Word 1 –

bits 8…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

HART Current Fault Limit (Configuration Words 4…7 –

bits 3…7, 11…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

HART Data Publishing Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Enable HART PV Upper and Lower Range (Configuration Word

105, bits 8...15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Enable HART PV Damping Value (Configuration Word 105,

bits 0…7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Primary Input Data (RTD Input Data) for 1794-IF8IH and

1794-IF8IHNFXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Primary Input Data (Input Words 0…7 – bits 0…15) . . . . . . . . . . . . 46

Module Diagnostic Status (Input Word 10 – bits 0…7) . . . . . . . . . . 46

HART Failure (Input Word 11 – bits 0…7) . . . . . . . . . . . . . . . . . . . . 50

HART Current Ratio (Input Word 11 – bits 8…15) . . . . . . . . . . . . 50

HART Transmitter List (Input Word 10 – bits 8…15) . . . . . . . . . . 51

Secondary Input Data (Cyclic EDT Input Data) for 1794-IF8IH and

1794-IF8IHNFXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

HART Command 3 Communication Status (Secondary Input

Word 0, bits 0…7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

HART Field Device Command and Communication Status

(Secondary Input Word 2, bits 0…7) . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

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HART Field Device Status (Secondary Input Word 2 –

bits 8…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

HART Loop Status (Secondary Input Word 3 – bits 0…7). . . . . . . 54

HART PV Status (Secondary Input Word b, bits 8…15) . . . . . . . . . 54

HART Primary Variable (Secondary Input Words 4, 5 –

bits 0…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

HART Secondary Variable (Secondary Input Words 6, 7 –

bit 0…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

HART Third Variable (Secondary Input Words 8, 9 –

bits 0…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

HART Fourth Variable (Secondary Input Words 10, 11 –

bits 0…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

HART Primary Variable Units Code (Secondary Input Word 12 –

bits 0…7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

HART Secondary Variable Units Code (Secondary Input Word

12 – bits 8…15). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

HART Third Variable Units Code (Secondary Input Word 13

– bits 0…7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

HART Fourth Variable Units Code (Secondary Input Word

– bits 8…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

RTD Output Data for 1794-IF8IHNFXT . . . . . . . . . . . . . . . . . . . . . . . . . 56

Module Configuration for the 1794-OF8IH. . . . . . . . . . . . . . . . . . . . . . . . 56

Output Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Configuration Parameters for 1794-OF8IH . . . . . . . . . . . . . . . . . . . . . . . . 57

Configuration Parameter Descriptions for 1794-OF8IH . . . . . . . . . . . . 59

Byte Order (Configuration Word 0 – bits 0…1, 8…9). . . . . . . . . . . . 59

Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Fault Mode (Configuration Word 0 – bit 15) . . . . . . . . . . . . . . . . . . . 61

Disable HART Channel 0…7 (Configuration Word 17 –

bits 0…7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

HART Current Ratio (Configuration Words 4…7 – bits 3…7,

11…15.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…10,

12…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Latch Mode (Configuration Words 4…7 – bits 2, 10). . . . . . . . . . . . 65

Analog/Digital Output Mode (Configuration Word 8 –

bits 0…7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Analog Fault Mode Selection (Configuration Words 4…7 –

bits 0…1, 8…9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Analog Fault Value Output Data (Configuration Words 9…16 –

bits 0…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Digital Mode Fault State (Configuration Word 8 – bit 8…15). . . . 67

HART CMD 3 Disable (Configuration Word 7 – bits 0…7) . . . . . 68

Primary Input Data (RTD Output Data) for the 1794-OF8IH . . . . . . 69

Fault Alarm (S0 Read Word – bits 8…15) . . . . . . . . . . . . . . . . . . . . . . 69

Diagnostic Data (S0 Read Word – bits 0…7). . . . . . . . . . . . . . . . . . . . 70

Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

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HART Status Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

HART Current Fault (S2 Read Word – bits 8…15) . . . . . . . . . . . . . 71

HART Transmitter List (S3 Read Word – bits 8…15) . . . . . . . . . . . 72

Primary Output Data (RTD Output Data) for 1794-OF8IH . . . . . . . . 72

Analog Output Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Digital Output Data (O0 Read Word – bits 0…7) . . . . . . . . . . . . . . . 72

Global Reset (O0 Read Word – bit 14) . . . . . . . . . . . . . . . . . . . . . . . . . 72

Fault (EDT Write Word – bit 14) and Run/Prog (EDT Write

Word – bit 13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Secondary Input Data (Cyclic EDT Input Data) for 1794-OF8IH . . . 73

Secondary Data Table Section Created by the Adapter. . . . . . . . . . . 75

HART Command 3 Communication Status (Input Word 0 –

bits 0…7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

HART Field Device Status (Secondary Input Word 2 –

bits 8…15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Interpret the Status Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Edit Your 1794-IF8IHNFXT Configuration with Logix Designer

(Full Profile) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

General Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Connection Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Configuration Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Alarm Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

HART Command Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Calibration Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

HART Device Info Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Getting HART Data Using CIP MSG Instructions

Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

Chapter 5

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Use RSNetWorx to Send and Receive CIP MSG Instructions. . . . . . . . 89

Access HART Data Using CIP Message Instruction (MSG) . . . . . 92

Fill in the Information Needed for a MSG Instruction . . . . . . . . . . . 93

Select the Attribute Value for the Operation You Want to Perform. .

Retrieve Additional Information About the HART Device . . . . . . 95

Get Device Info Block 1 Message for 1794-IF8IH and

1794-OF8IH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Get Device Info Block 2 Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Get Device Info Block 3 Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Reset the Device Info Changed Status Bit Message . . . . . . . . . . . . . 103

HART Pass-through Message Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Format a HART Pass-through Init Request Message . . . . . . . . . . . 106

Format a Get Pass-through Message Status Request. . . . . . . . . . . . . 107

HART Failed Reason Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Format a Read Pass-through Reply Request . . . . . . . . . . . . . . . . . . . . 109

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Page 11

Troubleshoot Your Module

Use the 1794-IF8IH Module with the Generic Profile

Chapter 6

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Interpret Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Diagnostic Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Hardware Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Module Configuration Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

HART PV Configuration Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

HART Failure Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Chapter Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Appendix A

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Background Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Byte Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Fault Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

HART Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Channel Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Digital Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

High Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Low Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Remote High High Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Remote Low Low Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

HART Command 3 Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Input Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Input Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

High Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Low Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Out of Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Second Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Diagnostic Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

HART Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

HART Current Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

HART Transmitter Present . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Use the 1794-IF8IHNFXT with the Generic and Thin Profiles

Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

Appendix B

Edit a Thin Profile Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Configure a Generic Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Define Your Own Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Reference Configuration Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Byte Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Fault Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

HART Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Channel Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Page 12

xii

Digital Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

High Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Low Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Remote High High Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Remote Low Low Alarm Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

PV Damping Value (32-bit floating point, LowWord) . . . . . . . . . 151

HART Command 3 Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Input Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Input Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

High Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Low Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Out of Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Second Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Diagnostic Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

HART Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

HART Current Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

HART Transmitter Present . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Use the 1794-OF8IH Module with the Generic Profile

Index

Appendix C

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Background Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Fault Enable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Local Fault Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

HART Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Channel Data Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Analog Fault Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Digital Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Digital Fault Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Analog Fault Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

HART Command 3 Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Digital Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Fault Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Diagnostic Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

HART Current Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

HART Transmitter Present . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

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Chapter

IMPORTANT

About the FLEX I/O HART Analog Modules

Overview

This chapter describes the FLEX I/O Highway Addressable Remote Transducer (HART) analog modules and what you must know and do before you begin to use them.

Read this chapter to familiarize yourself with the HART analog modules.

Topic Page

What FLEX I/O Analog Modules Do 1

Communicate with Programmable Controllers 2

Use Alarms on the Input Modules 3

Use the HART Capabilities 5

HART Implementation Overview 6

Chapter Summary 6

To use all of the features of these modules it must be used with the 1794-ACN(R)15 with version 5.001 firmware or later, or the 1794-AENT with firmware revision 4.002 and later, or the 1794-AENTR with firmware version 1.011 and later.

For more information about using these modules with 1794-ACN(R)15 with firmware revision 5.001 and later, see 1794-RN071

Logix Designer version 24 includes a full profile for 1794-IF8IHNFXT module. You cannot use the 1794-IF8IH profile to configure the 1794-IF8IHNFXT module.

See Use the 1794-IF8IHNFXT with the Generic and Thin Profiles

page 135 if you are using RSLogix 5000 version 23 or earlier.

The Logix Designer application is the rebranding of the RSLogix 5000 application.

What FLEX I/O Analog

The FLEX I/O HART input and output modules must be used in a ControlNet or EtherNet network.

Modules Do

The 1794-IF8IH module accepts up to 8 analog inputs. The inputs are isolated and will accept current in either of the following two ranges: 4…20 mA or 0…20 mA. The default input range is 0…20 mA. The inputs have both fixed hardware filters and selectable firmware digital filters.

1 Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

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2 About the FLEX I/O HART Analog Modules

The 1794-IF8IHNFXT module supports 0…20 mA and 4…20 mA ranges, with a default input range of 0…20 mA. It has seven selectable input filters and seven input data formats. It provides support for loop alarm, which detects gross signal errors such as open and short circuit. It has programmable user alarms (high, low, remote high high, and remote low low). The module has a HART modem per channel. It is compliant with HART versions 5, 6, and 7, with the exception of multi-drop support.

The 1794-OF8IH module provides as many as eight (8) analog outputs. The outputs are isolated and will provide current in either of the following two ranges: 4…20 mA or 0…20 mA. The default output range is 0…20 mA.

Each module offers:

• full functionality without switches or jumpers.

• multiple data ranges that can be independently programmed for each channel.

• lead breakage detection.

• overrange/underrange alarms.

• remote transmitter alarm.

Communicate with Programmable Controllers

Data connections are established between the FLEX I/O module and an Allen-Bradley programmable controller (PLC) 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 Powerup

You must apply +24V DC power to your FLEX I/O analog I/O modules. The following sequence of events occurs after power has initially been applied to your module:

1. The module status indicator will blink red until a connection is established and a valid configuration is passed to the module.

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About the FLEX I/O HART Analog Modules 3

Module type

Removable label

Keyswitch (indicator is at #3) Power On indicator

Input designators

44811

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, refer to Configurable FLEX

I/O Analog Module Features on page 7.

3. Following the module configuration download for the 1794-IF8IH and 1794-IF8IHNFXT modules, the module begins producing runtime data for the PLC processor.

Following the module configuration download for the 1794-OF8IH 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 processor.

Physical Features of Your Module

The module label identifies the key-in 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 1794-IF8IH module is shown below.

8 CH HART ISOLATED ANALOG INPUT

IN1IN0 IN2 IN3 IN4

IN5

1794-IF8IH

IN6 IN7

PWR

Use Alarms on the Input Modules

Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

The 1794-IF8IH and 1794-IF8IHNFXT FLEX I/O modules are capable of generating four alarms:

• Low Alarm

• High Alarm

•Remote Fault

•Local Fault

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4 About the FLEX I/O HART Analog Modules

IMPORTANT

These alarm conditions are described in general terms and as they relate to bits on the FLEX I/O module on the following pages.

Low Alarm

The low alarm notifies you when module input signal moves below the configured low alarm trigger point. If the input signal falls below 0% (4 mA), a Low Alarm is generated.

High Alarm

The high alarm works converse to the low alarm. This feature notifies you when the input signal falls above the configured high alarm trigger point. If the input signal falls above 0% (4 mA), an Underrange Alarm is generated.

Remote Fault Alarm

The remote fault alarm is 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 Fault Enable bit allows the 1794-IF8IH and 1794-IF8IHNFXT modules to work with transmitters like the one just described.

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

Use 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.

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About the FLEX I/O HART Analog Modules 5

IMPORTANT

Programming the Remote Fault Alarm

For the remote fault alarm, you must program the threshold in 0.1 mA 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…111.88% (20.1…21.9 mA) on the high end of input signal range

• -0.63…-11.88% (3.9…2.1 mA) on the low end of input signal range.

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.

Use the HART Capabilities

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

• 112.50% (22 mA) or higher on the high end of input signal range. This value indicates a short in the loop.

• -12.50% (2 mA) 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.

Before using the HART capabilities, be sure that:

• the I/O module and the associated field device are working properly in the analog 4…20 mA mode.

• the I/O module is configured for 4…20 mA range.

• the field device is HART capable.

• no more than one HART field device is connected to each channel.

• input filtering is set to a valid (defined) value.

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6 About the FLEX I/O HART Analog Modules

Processor

User program

Adapter FLEX I/O

HART module

HART Field Device

Command

Response

for example, HART Command 3)

Flexbus

4…20 mA with HART signal

HART Implementation Overview

The FLEX I/O HART modules act as intelligent HART multiplexers. Basically, the module learns which HART devices are attached to its channels and then routes HART messages, as appropriate, between the HART field devices and the flexbus. Since the HART modules act as intelligent HART multiplexers, HART commands can be issued to the HART modules themselves.

Communication on the flexbus occurs between the adapter and the HART module. The adapter converts these messages to the appropriate network format for communication with the controlling processor. The controlling processor gets its command from the user program, storing the responses in its memory.

Chapter Summary

In this chapter, you learned about FLEX I/O analog I/O modules and HART module capabilities. Read the next chapter to learn about configurable features on your module.

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Chapter

IMPORTANT

Configurable FLEX I/O Analog Module Features

Overview

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

Topic Page

Select Your Analog Input Module Operating Features 8

Select Your Analog Output Module Operating Features 9

Understand Image Table Mapping and Bit/Word Descriptions 12

Chapter Summary 13

HART configurable features described in this chapter include the following

1794-IF8IH and 1794-IF8IHNFXT Input Modules

Fault Mode Output Enable

High Low Error Level Module Fault State Mode

Input Filter Cutoff Local Fault Mode

Data Format Data Format

1794-OF8IH Output Module

Global Reset

Analog Fault State

Latch Retry Mode

Fault Alarm

You must use the I/O configuration portion of your PLC programming software to select and configure these features for 1794-IF8IH and 1794-OF8IH modules. This manual assumes familiarity with the programming software. A brief description of each module feature is provided here.

To learn more about configuration for the 1794-IF8IH and 1794-OF8IH modules, see the following:

• Configuration

• Use the 1794-IF8IH Module with the Generic Profile on page 119

• Use the 1794-OF8IH Module with the Generic Profile on page 159

7 Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

on page 27

Page 20

8 Configurable FLEX I/O Analog Module Features

IMPORTANT

Configuration for the 1794-IF8IHNFXT module is done through Logix Designer software version 24. See Edit Your 1794-IF8IHNFXT

Configuration with Logix Designer (Full Profile) on page 76.

See Use the 1794-IF8IHNFXT with the Generic and Thin Profiles

135 if you are using RSLogix 5000 version 23 or earlier.

on page

Select Your Analog Input Module Operating Features

All features of the 1794-IF8IH and the 1794-IF8IHNFXT analog input modules are independently configurable.

The default selection value for all parameters is 0.

Fault Enable

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

• Remote Fault Alarm

•Local Fault Mode

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

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

For more information refer to Remote Fault Alarm

on page 4 and Local Fault

Alarm on page 5.

Sample Filter Frequency Rates

Six available input filter settings for the 1794-IF8IH module and seven input filter settings for the 1794-IF8IHNFXT module 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 470 Hz (filter 0) for the 1794-IF8IH module, signal noise is more likely to affect the reading, but the slowest frequency of 4.17 Hz (filter 5) provides the most accurate signal due to

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Configurable FLEX I/O Analog Module Features 9

IMPORTANT

incoming noise filtering. It is recommended that you use 62 Hz when HART is enabled to get more accurate signals due to incoming noise.

Refer to the Input Filter Frequency table to decide which input filter to use in your FLEX I/O analog I/O application:

Input Filter Frequency for the 1794-IF8IH Module

01234567

470 Hz 62 Hz 19.6 Hz 16.7 Hz 10 Hz 4.17 Hz n/a n/a

Input Filter Frequency for the 1794-IF8IHNFNXT Module

01234567

242 Hz 123 Hz 62 Hz 19.6 Hz 16.7 Hz 10 Hz 4.17 Hz n/a

(1)

To configure input filter frequency and other module features for 1794-IF8IHNFXT module in Logix Designer, see

Configure 1794-IF8IHNFXT Module with Logix Designer Software on page 191

(1)

Choose the best input filter cutoff in your programming software.

Data Formats

You must choose a module data format in your user program. Six data formats are available for the 1794-IF8IH module, and seven data formats for the 1794-IF8IHNFXT module.

Default format is 0

The data format selected interprets input readings and returns them to the PLC.

See the Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…11, 12…15)

on page 37 for Data Format tables and a more detailed description of data

formats for the 1794-IF8IH and 1794-IF8IHNFXT modules.

…20 mA.

Select Your Analog Output Module Operating Features

Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

To configure data formats and other module features for 1794-IF8IHNFXT module in Logix Designer, see Configure 1794-IF8IHNFXT Module with

Logix Designer Software on page 191.

All features of the 1794-OF8IH analog output module are independently configurable.

The default selection value for all parameters is 0.

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10 Configurable FLEX I/O Analog Module Features

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.

Analog fault state and digital fault state determine how the module reacts to faults when a channel is used in analog mode or digital mode, respectively.

Latch Mode

Latch Mode determines channel operation under wire-off or lead-break fault conditions. This feature is available for each channel. 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 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.

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Configurable FLEX I/O Analog Module Features 11

Diagnostic Data error 11 = data out of range

04812162024

Output mA

Datatable

20.000

16.000

12.000

8.000

4.000

0.000

-4.000

Data Format

You must choose a module data format in your user program. See 1794-OF8IH

Data Formats on page 64 for an explanation of each bit. Data Formats 2, 5, 6, 8, 9,

10, 11, 12, 13 and 15 are not assigned.

When choosing a data format, remember the following :

• If an unassigned Analog Data Format is selected, the module sets Diagnostic Data to 2 for configuration failure and puts affected channels in the corresponding fault state.

• An unconfigured module channel can be assumed to have the default configuration Analog Data Format 0, 0 to 20 mA 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 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

•Default: 0

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

If the 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.

Example of Analog Format 14 and Data Clipping Performance.

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12 Configurable FLEX I/O Analog Module Features

For data format tables and a more detailed description of the data formats for the 1794-OF8IH module, see Data Format (Configuration Words 2, 3 – bits 0…3,

4…7, 8…10, 12…15) on page 63.

Fault Alarm

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

Understand Image Table

All Allen-Bradley FLEX I/O modules have a sixteen word table of Real Time Data (RTD) to be transferred between the controller and the I/O module. Not

Mapping and Bit/Word

all 16 words need be allocated.

Descriptions

1794-IF8IH Analog Data Table

Word Bit

1514131211109876543210

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 8 H7H6H5H4H3H2H1H0L7L6L5L4L3L2 L1L0 9 R7 R6R5R4 R3R2R1R0P7P6P5P4P3P2 P1P0 10 Reserved Diagnostic Status 11 C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0 12 X7 X6 X5 X4 X3 X2 X1 X0 Reserved Where: Hn: Channel n High Alarm

Ln: Channel n Low Alarm Pn: Channel n Out Of Range Alarm Rn: Channel n Second (Remote) Alarm Fn: Channel n HART Failure Cn: Channel n HART Current Fault Xn: Channel n HART Transmitter Present

0: False 1: True

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Configurable FLEX I/O Analog Module Features 13

1794-IF8IHNFXT Analog Data Table

Word Bit

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

(1)

11 C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0 Where: Hn: Channel n High Alarm

X6 X5 X4 X3 X2 X1 X0 Diagnostic Status

Ln: Channel n Low Alarm Pn: Channel n Out Of Range Alarm Rn: Channel n Second (Remote) Alarm Fn: Channel n HART Failure Cn: Channel n HART Current Fault Xn: Channel n HART Transmitter Present

0: False 1: True

(1)

When Xn is set, a device is connected and a has a valid device information data set available. This bit will clear if the channel is inhibited, the device is removed, or the device is faulted, and will not be set again until a complete device information set is successfully regathered. Words S:0…S:3 are input data classified as Status Words but in RSLogix generic profile, these words are shown as tags I:8…I:11.

1794-IF8IHNFXT Output Analog Data Table

Word Bit

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 R R R R R R R R HO7 HO6 HO5 HO4 HO3 HO2 HO1 HO0 Where: HOn: Channel n HART Off Dynamic Control bit

0: False 1: True

Chapter Summary

In this chapter, we told you about the FLEX I/O system and the analog I/O modules, and how they communicate with programmable controllers. Move on to the next chapter to learn how to install your FLEX I/O analog module.

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14 Configurable FLEX I/O Analog Module Features

Notes:

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Chapter

Install Your FLEX I/O Analog Modules

Overview

Before You Install Your Analog Module

Read this chapter to install the input and output analog modules.

Topic Page

Before You Install Your Analog Module 15

Removal and Insertion Under Power 15

Install the Module 16

Wire the Terminal Base Units 22

Connect Wiring to the FLEX I/O HART Analog Modules 22

Ground the Module 26

Chapter Summary 26

Before installing your FLEX I/O analog module:

You Need To As Descibed Under

Verify that the module will be installed in a suitable enclosure

Position the keyswitch on the terminal base Install the Module on page 16

Removal and Insertion Under Power page 15

ATTENTION: These modules do not receive primary operational power from the backplane. +V and -V DC power must be applied to your module before installation. If power is not applied, the module position will appear to the adapter as an empty slot in your chassis.

Removal and Insertion Under Power

15 Rockwell Automation Publication 1794-UM065C-EN-E - June 2014

WARNING: These modules are designed so you can remove and insert them under power. However, take special care when removing or inserting these modules in an active process. I/O attached to any module being removed or inserted can change states due to its input/output signal changing conditions. If you insert or remove the terminal base while backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations.

Be sure that power is removed or the area is nonhazardous before proceeding.

Page 28

16 Install Your FLEX I/O Analog Modules

WARNING: When used in a class I, division 2, hazardous location, this equipment must be mounted in a suitable enclosure with proper wiring method that complies with the governing electrical codes.

Install the Module

Installation of the module consists of the following:

•Mounting the terminal base unit.

• Installing the analog I/O module into the terminal base unit.

• Installing the connecting wiring to the terminal base unit.

If you are installing your module into a terminal base unit that is already installed, proceed to page 20.

ATT ENTI ON: Do not use the unused terminals on the terminal base unit. Using the terminals as supporting terminals can result in damage to modules and/or unintended operation of your system.

Mount on a DIN Rail

ATTENTION: Do not remove or replace a terminal base unit when

power is applied. Interruption of the flexbus can result in unintended operation or machine motion.

Install the Terminal Base Unit

1. Remove the cover plug in the male connector of the unit to which you are connecting this terminal base unit.

2. Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this terminal base unit will mate correctly.

3. Make certain that the female flexbus connector is fully retracted into the base unit.

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Install Your FLEX I/O Analog Modules 17

41106

41107

4. Position the terminal base at a slight angle and hooked over the top of the 35 x 7.5mm DIN rail A (Allen Bradley part number 199-DR1)

5. Slide the terminal base over tight against the adapter (or proceeding terminal base). Make sure the hook on the terminal base slides under the edge of the adapter (or proceeding terminal base) and the flexbus connector is fully retracted.

ATTENTION: Do not force the terminal base into the adjacent modules. Forcing the units together can bend or break the hook and allow the units to separate and break communication over the backplane.

6. Rotate the terminal base onto the DIN rail with the top of the rail hooked under the lip on the rear of the terminal base.

Use caution to make sure that the female flexbus connector does not strike any of the pins in the mating male connector.

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18 Install Your FLEX I/O Analog Modules

41108

41109

7. Press down on the terminal base unit to lock the terminal base on the DIN rail. If the terminal base does not lock into place, use a screwdriver or similar device to open the locking tab, press down on the terminal base until flush with the DIN rail and release the locking tab to lock the base in place.

Gently push the flexbus connector into the side of the adapter (or proceeding terminal base) to complete the backplane connection.

8. For specific wiring information, refer to the installation instructions for the module you are installing in this terminal base unit. Terminal assignments are also given later in this chapter, see page 22.

9. Repeat the above steps to install the next terminal base unit. Be sure the flexbus connector cover on the last terminal base unit is in place.

Mount on a Panel or Wall

Installation of a FLEX I/O system on a wall or panel consists of:

• laying out the drilling points on the wall or panel.

• drilling the pilot holes for the mounting screws.

• mounting the adapter mounting plate.

• installing the terminal base units and securing them to the wall or panel.

If you are installing your module into a terminal base unit that is already installed, proceed to Mount the Analog Modules on the Terminal Base Unit on page 20.

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Install Your FLEX I/O Analog Modules 19

(35.5)

1.4

41547

35.5 (1.4)

15.6 (0.61)

58.5 (2.3)

40.5 (1.6)

8 (0.3)

35.5 (1.4)

58.5 (2.3)

35.5 (1.4)

0.83 (21)

50 (2.0)

Measurements are in mm (in.)

40871

TIP

Use the mounting kit Cat. No. 1794-NM1 for panel/wall mounting.

Description Description

1 Mounting plate for adapter 3 Terminal base unit (not included)

2 #6 Self-tapping screws 4 Adapter module (not included)

To install the mounting plate on a wall or panel:

1. Lay out the required points on the wall/panel as shown in the drilling dimension drawing.

Cable is either 292.1 mm (11.5 in.) or 901.0 mm (35.5 in.) from upper connector — depending if you use 0.3 m (1 ft) or 0.91 m (3 ft) cable.

ATTENTION: Be careful of metal chips when drilling cable mounting holes. Do not drill holes above a system that has any modules installed.

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20 Install Your FLEX I/O Analog Modules

IMPORTANT

2. Drill the necessary holes for the #6 self-tapping mounting screws.

3. Mount the mounting plate for the adapter module using two #6

self-tapping screws (18 included for mounting up to 8 modules and the adapter).

Make certain that the mounting plate is properly grounded to the panel. Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1

4. Hold the adapter at a slight angle and engage the top of the mounting plate in the indention on the rear of the adapter module.

5. Press the adapter down flush with the panel until the locking lever locks.

6. Position the terminal base unit up against the adapter and push the female

bus connector into the adapter.

7. Secure to the wall with two #6 self-tapping screws.

8. Repeat for each remaining terminal base unit.

Mount the Analog Modules on the Terminal Base Unit

The HART analog input and output modules mounts on a 1794-TB3 or 1794-TB3S terminal base unit.

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Install Your FLEX I/O Analog Modules 21

Label here

40231

or under here

1. Rotate keyswitch on terminal base unit clockwise to position 3 for the 1794-IF8IH/1794-IF8IHNFXT modules or position 4 for the 1794-OF8IH as required for each type of module. Do not change the position of the keyswitch after wiring the terminal base unit.

Description Description

1 Flexbus connector 5 Base unit

2 Latching mechanism 6 Alignment groove

3 Keyswitch 7 Alignment bar

4 Cap plub 8 Module

2. Make certain the flexbus connector is pushed all the way to the left to connect with the neighboring terminal base/adapter. You cannot install the module unless the connector is fully extended.

3. Make sure the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base unit.

4. Position the module with its alignment bar aligned with the groove on the terminal base.

5. Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism is locked into the module.

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22 Install Your FLEX I/O Analog Modules

41307

IMPORTANT

6. Remove cap plug and attach another terminal base unit to the right of this terminal base unit if required. Make sure the last terminal base has the cap plug in place.

The adapter is capable of addressing eight modules. Do not exceed a maximum of eight terminal base units in your system.

Wire the Terminal Base Units

Connect Wiring to the FLEX I/O HART Analog Modules

Wiring the FLEX I/O HART analog input modules is done using the 1794-TB3 or the 1794-TB3S terminal base unit.

ATTENTION: The FLEX I/O analog modules do not receive primary operational power from the backplane. +24V DC power must be applied to your module before operation. If power is not applied, the module position will appear to the adapter as an empty slot in your chassis. If the adapter does not recognize your module after installation is completed, cycle power to the adapter.

Each 1794-IF8IH and IF8IHNFXT input can be operated from an analog field device signal, and each 1794-OF8IH output channel can operate an analog field device.

When interconnecting several lines, you must consider the total accumulated power.

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Install Your FLEX I/O Analog Modules 23

0...15

16...33

34...51

1032547698112131014151

8292031323332232425262726171

CH-0 CH-2 CH-4 CH-6

CH-1 CH-3 CH-5 CH-7

81910212

647484940515041424344454435363738393

44781

FLEXbus

Bus

-V

Sig

4...20mA Xmit

40072

22 Ω

91 Ω 17V

4...20mA Xmit

Connections for the 1794-IF8IH and 1794-IF8IHNFXT HART Analog Input Modules on a 1794-TB3S Terminal Base Unit

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24 Install Your FLEX I/O Analog Modules

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

2417

05948474

44319

AC or DC

Four-wire Current Transmitter

Row A

Row B

Row C

Current

Input

Current Input

1794-TB3S shown

DC only Three-wire Current Transmitter

DC only Two-wire Current Transmitter

Label placed at top of wiring area

Row C

Row B

Row A

192021

22 23

28 29

30 31

35 39

404142

44319

1794-TB3S shown

For Two-wire Transmitter Devices:

1. Connect the individual input wiring to terminal pairs (0/1) (2/3) (4/5) (6/7) (8/9), (10/11), (12/13), (14/15) .

2. Connect +V DC power to terminal 34 on the 34...51 row (C).

3. Connect -V to terminal 35 on the 34...51 row (C).

4. If continuing power to the next terminal base unit, connect a jumper from

terminal 50 (+V DC) on this base unit to +V DC power terminal on the next terminal base unit.

5. If continuing common to the next terminal base unit, connect a jumper from terminal 51 (-V common) on this base unit to the -V common terminal on the next terminal base unit.

ATTENTION: Do not use the unused terminals on the terminal base unit. Using these terminals as supporting terminals can result in damage to the module and/or unintended operation of your system.

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FLEXbus

0 16 34

1 17 35

2 18 36

3 19 37

4 20 38

5 21 39

6 22 40

7 23 41

8 24 42

9 25 43

10 26 44

11 27 45

12 28 46

13 29 47

14 30 48

15 31 49

32 50

33 51

44319x

Row A Row B

Row C

Row B

Row C

Row A

1794-TB3S shown

Label placed at top of wiring area

Actuator Actuator

Actuator

Install Your FLEX I/O Analog Modules 25

Connections for the 1794-OF8IH HART Analog Output Module on a

-V

Power supply

4...20 mA Actuator

4...20 mA valve

41441

1794-TB3 or 1794-TB3S Terminal Base Unit

250 Ω

21.6V

Bus

HART Modem

45 Ω

1794-OF8IH Module

CH-0

CH-1 CH-2 CH-3 CH-4 CH-5 CH-6 CH-7

1032547698112131014151

0...15

81910212

-Vin -V

C O M M O N S

8292031323332232425262726171

16...33

647484940515041424344454435363738393

34...51

+Vin +V

44782

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26 Install Your FLEX I/O Analog Modules

44398

Shield-terminating feed through

Bus bar

ATTENTION: Do not use the unused terminals on the terminal base unit. Using these terminals as supporting terminals can result in damage to the module and/or unintended operation of your system.

1. Connect the individual input wiring to terminal pairs (0/1), (2/3), (4/5), (6/7), (8/9), (10/11), (12/13), (14/15).

2. Connect +V DC power to terminal 34 on the 34...51 row (C).

3. Connect -V to terminal 35 on the 34...51 row (C).

4. If continuing power to the next terminal base unit, connect a jumper from

terminal 50 (+V DC) on this base unit to +V DC power terminal on the next terminal base unit.

5. If continuing common to the next terminal base unit, connect a jumper from terminal 51 (-V common) on this base unit to the -V common terminal on the next terminal base unit.

Ground the Module

Chapter Summary

All I/O wiring must use shielded wire. Shields must be terminated external to the module, such as bus bars and shield-terminating feed throughs.

8 CH HART ISOLATED ANALOG INPUT

IN0 IN1 IN2 IN3

IN4 IN5 IN6 IN7

1794-xx8iH

I/O

PWR

In this chapter, we told you how to install your input module in an existing programmable controller system and how to wire to the terminal base units.

Go to the next chapter to learn about input, output and configuration files for HART analog I/O modules on ControlNet and EtherNet/IP networks.

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Page 39

Configuration

IMPORTANT

Chapter

Overview

This section provides descriptions of the different configuration parameters for your FLEX I/O HART modules.

Configuring the 1794-IF8IH and 1794-OF8IH modules require RSLogix 5000 version 17 or later. See the following sections for configuring your modules:

• Use the 1794-IF8IH Module with the Generic Profile on page 119

• Use the 1794-OF8IH Module with the Generic Profile on page 159

Configuring the 1794-IF8IHNFXT module requires Logix Designer version 24 or later. See Edit Your 1794-IF8IHNFXT Configuration with

Logix Designer (Full Profile) on page 76 for information on how to

configure the 1794-IF8IHNFXT module with Logix Designer.

If you are using RSLogix 5000 version 23 or earlier, you can use the thin and generic profiles to configure your module, see Use the 1794-

IF8IHNFXT with the Generic and Thin Profiles on page 135.

(1) The Logix Designer application is the rebranding of RSLogix 5000 software.

See the table for a list of where to find specific information in this chapter.

Topic Page

Data Transfer Types 27

Primary Input Data (RTD Input Data) for 1794-IF8IH and 1794-IF8IHNFXT 45

(1)

Data Transfer Types

Secondary Input Data (Cyclic EDT Input Data) for 1794-IF8IH and 1794IF8IHNFXT

RTD Output Data for 1794-IF8IHNFXT 56

Module Configuration for the 1794-OF8IH 56

Primary Input Data (RTD Output Data) for the 1794-OF8IH 69

Secondary Input Data (Cyclic EDT Input Data) for 1794-OF8IH 73

Interpret the Status Indicators 76

Edit Your 1794-IF8IHNFXT Configuration with Logix Designer (Full Profile) 76

Chapter Summary 88

The modules make use of three data transfer modes that will be supported by the FLEX I/O Adapter.

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28 Configuration

The first mode is traditional real time data transfer called Cyclic Data Transfer (CDT). This class 1 connection continuously transfers 16 words maximum, composed of Input, Output, and Configuration registers. CDT will be used for standard Analog data transfers.

The second mode of data transfer makes use of the Cyclic EDT mode. Cyclic EDT will be used for continuous Class 1 transfer of HART data. This includes the first four dynamic HART Data variables, along with standard HART status information.

The third mode of data transfer uses EDT for HART pass-through Class 3 Messages. HART pass-through messages can be initiated from a number of sources, and are non-periodic. This allows the HART pass-through messages from the HART Foundation Server, and other third party sources.

1794-IF8IH and 1794-IF8IHNFXT I/O Profiles

All Allen-Bradley FLEX I/O modules have a sixteen word table of Real Time Data (RTD) to be transferred between the controller and the I/O module. Not all 16 words need be allocated. The 1794-IF8IH and 1794-IF8IHNFXT modules have the following RTD IO Profile:

1794-IF8IH RTD I/O Profile

RTD Index Assembly/Index Asembly

RTD 0 MSW Module Status Word

RTD 1 EDT Read Word EDT Read Word

RTD 2…9 I:0…I:7 RTD Input Data

RTD 10…14 S:0…14 RTD Status Data

RTD 15 EDT Write Word EDT Write Word

In addition to the RTD, the module uses EDT for Configuration and HART data. The 1794-IF8IH and 1794-IF8IHNFXT modules have the following EDT IO Profiles:

1794-IF8IH EDT I/O Profile

Number of Word EDT Assembly

42 EDT Configuration Data

98 Cyclic EDT HART Input Data (Accessed in eight 24 byte Assemblies)

48 EDT Output Pass-Through message request buffer A

1794-IF8IHNFXT EDT IO Profile

Number of Word EDT Assembly

106 EDT Configuration Data

98 Cyclic EDT HART Input Data (Accessed in eight 24 Assemblies)

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Configuration 29

Configuration Parameters for 1794-IF8IH

The configuration parameters for 1794-IF8IH module is shown in the following table. These are normal module configuration items and are sent to the module. Configuration is located at EDT assembly 37. The last row of the following table gives a brief explanation of each configuration parameter bit.

1794-IF8IH Configuration Data Table

Word Bit

1514131211109876543 210

0 R R F7F6F5F4

1 DH7 DH6 DH5 DH4 DH3DH2 DH1 DH0

2 CH 3 Format CH 2 Format CH 1 Format CH 0 Format

3 CH 7 Format CH 6 Format CH 5 Format CH 4 Format

4 CH1 HART Current Ratio FLTR1 CH0 HART Current Ratio FLTR0

5 CH3 HART Current Ratio FLTR3 CH2 HART Current Ratio FLTR2

6 CH5 HART Current Ratio FLTR5 CH4 HART Current Ratio FLTR4

7 CH7 HART Current Ratio FLTR7 CH6 HART Current Ratio FLTR6

8 Reserved

9 CH0 High Alarm threshold

10 CH0 Low Alarm threshold

11 CH0 Remote High High Alarm Limit

12 CH0 Remote Low Low Alarm Limit

13…16 Words 9…12 for Channel 1

17…20 Words 9…12 for Channel 2

21…24 Words 9…12 for Channel 3

25…28 Words 9…12 for Channel 4

29…32 Words 9…12 for Channel 5

33…36 Words 9…12 for Channel 6

37…40 Words 9…12 for Channel 7

41 Reserved C7 C6 C5 C4 C3 C2 C1 C0

Where: BOA = Byte Order Group A

(1) Not shown or used in the RSLogix 5000 software.

(2) Reserved data may not be shown in certain controller software.

BOB = Byte Order Group B Note: Byte order group A and B values must match each other. See the table

FLTRn = Channel n Digital Filter. See the table

Fn = Fault mode channel. 0: Local/Remote Faults disabled; 1: Enabled.

CHn HART Current Ratio = HART current ratio limiti on Channel n. Valid values are 0, or 5…31 percent of full scale. A value of 0 disables this feature. See table

Current Ratio on page 51 for more information.

DHn = Disable HART communication on Channel n. 0: HART communications enabled; 1: HART communications disabled.

Cn = HART Data Publishing Disable for Channel n. 0: HART Data Publishing Disable enabled; 1: HART Data Publishing Disable disabled.

R = Reserved.

CH N format = Data format for Channel n. See table

1794-IF8IH Channel Digital Filter on page 35.

1794-IF8IH Channel Data Formats on page 38.

BOB

(1)

Byte Order on page 32.

RRF3F2F1F0

(2)

Reserved

(1)

BOA

1794-IF8IH HART

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30 Configuration

After looking at the configuration tables, see also Configuration Parameter

Descriptions for 1794-IF8IH and 1794-IF8IHNFXT on page 32 for a detailed

description of the configuration parameter bits.

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Configuration 31

Configuration Parameters

The last row of the following table gives a brief explanation of each configuration bit. See also, Configuration Parameter Descriptions for 1794-IF8IH and 1794-

for 1794-IF8IHNFXT

1794-IF8IHNFXT Configuration Data Table

Word Bit

0 R R F7F6F5F4BOB 1 DH7 DH6 DH5 DH4 DH3 DH2 DH1 DH0 Reserved 2 CH 3 Format CH 2 Format CH 1 Format CH 0 Format 3 CH 7 Format CH 6 Format CH 5 Format CH 4 Format 4 HART_Ilimit_CH1 FLTR1 HART_Ilimit_CH0 FLTR0 5 HART_Ilimit_CH3 FLTR3 HART_Ilimit_CH2 FLTR2 6 HART_Ilimit_CH5 FLTR5 HART_Ilimit_CH4 FLTR4 7 HART_Ilimit_CH7 FLTR7 HART_Ilimit_CH6 FLTR6 8 CH0 High Alarm Threshold 9 CH0 Low Alarm Threshold 10 CH0 Remote High High Alarm Limit 11 CH0 Remote Low Low Alarm Limit 12 CH0 PvDampingValue (32 bit, Floating Point, LowWord) 13 CH0 PvDampingValue (32-bit Floating Point, HighWord) 14 CH0 PvUpperRange (32-bit Floating Point, LowWord) 15 CH0 PvUpperRange (32-bit Floating Point, HighWord) 16 CH0 PvLowerRange (32-bit Floating Point, LowWord) 17 CH0 PvLowerRange (32-bit Floating Point, HighWord) 18 Reserved CH0 PV Range Units Code 19 Unused 20…31 Words 8…19 for channel 1 32…43 Words 8…19 for channel 2 44…55 Words 8…19 for channel 3 56…67 Words 8…19 for channel 4 68…79 Words 8…19 for channel 5 80…91 Words 8…19 for channel 6 92…103 Words 8…19 for channel 7 104 Reserved C7 C6 C5 C4 C3 C2 C1 C0 105 ER7 ER6 ER5 ER4 ER3 ER2 ER1 ER0 ED7 ED6 ED5 ED4 ED3 ED2 ED1 ED0 Where: BOA = Byte Order Group A

(1) Not shown in RSLogix 5000 software.

1514131211109876543210

BOB = Byte Order Group B Byte order group A and B values must match each other.

Byte Order (Configuration Word 0 – bits 0…1, 8…9) on page 32 for more information.

See FLTRn = Channel n Digital Filter. See table Fn = Fault mode Channel n. 0: Local / Remote faults disabled; 1: Enabled. HART_Ilimit_CHn = HART Loop Tolerance Error Limit for Channel n. Defines comparison limit for HART current loop to ADC compare.

Valid values are 0, or from 5 to 31 percent of full scale. A value of zero disables this feature. Full scale is defined as the difference between the normal high scale and the normal low.

Example: 4..20 mA: 20 - 4 = 16. 5% of 16 is 0.8 mA. Example: 4..20 mA: 20 - 0 = 20. 5% of 20 is 1.0 mA.

DHn = Disable HART communication on Channel n. 0: HART communications enabled; 1: HART communications disabled. Cn = HART Data Publishing Disable for Channel n. 0: HART Data Publishing Disable enabled; 1: HART Data Publishing Disable disabled. EDn = Enable HART PV Damping Value for Channel n. 0: True; 1: False. ERn = Enable HART PV Upper and Lower Range for Channel n. 0: True; 1: False. R = Reserved. CH N Format = Data format for Channel n. See table

12…15) on page 37..

CHn PVDampingValue = 32-bit Float (per channel) value used in HART Cmd 34 to set the device’s PV (primary value) damping value. CHn PV Range Units Code = 8-bit unsigned (per channel) PV Range Units Code used in HART Command 35. This value specifies the "Units Code" for the Upper and Lower Range

value configuration parameters and also supplies the value for command 44. This value is required by Command 35 to inform the device what units the Upper and Lower range values being sent in Command 35 are in. Command 35 does not change the PV units of the device. Command 44 is automatically sent by the module if the module detects that the PV Units code of the device does not match the parameter in the configuration table.

CHn PvUpperRange = 32-bit Float (per channel) specifies the value for the PV Upper Range value used in HART Cmd 35 to set the device PV Upper Range Value. CHn PvLowerRange = 32-bit Float (per channel). Specifies the value for the PV Upper Range value used in HART Cmd 35 to set the device PV Upper Range Value.

IF8IHNFXT on page 32, for a more detailed description of the configuration

bits.

(1)

1794-IF8IH Channel Digital Filter on page 35 and 1794-IF8IHNFXT Channel Digital Filter on page 36.

1794-IF8IHNFXT Channel Data Formats on page 39 and Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…11,

R R F3 F2 F1 F0 BOA

(1)

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32 Configuration

IMPORTANT

Configuration Parameter Descriptions for 1794-IF8IH and 1794-IF8IHNFXT

This following sections describe in detail each configuration parameter included in the tables:

• 1794-IF8IH Configuration Data Table

on page 29

• 1794-IF8IHNFXT Configuration Data Table on page 31

These parameter descriptions apply to both 1794-IF8IH and 1794-IF8IHNFXT modules, unless otherwise specified.

Byte Order (Configuration Word 0 – bits 0…1, 8…9)

This setting selects the byte order of module’s data. Note: The MSW and EDT words (Words 0, 1 and 15) of the Primary Input Data Table are not swapped. All other Primary Input Data and Configuration Data are adjusted according to the following chart.

Byte Order

Byte Order Group B

Bit 9 Bit 8 Bit 1 Bit 0 Description

0 0 0 0 Little Endian Format (default) — all data entries in true Little

1 0 1 0 Word Swap — word swap only values requiring more than

0 1 0 1 Byte Swap — byte swap all words in data table.

1 1 1 1 Big Endian Format — all data entries in true Big Endian

Byte Order Group A

Endian format

one word, for example, 32 bit float values.

format.

Byte Order cannot be changed using RSLogix 5000 software. RSLogix 5000 uses the default Byte Swap setting.

The purpose of this parameter is to allow this module to operate properly within data networks or systems utilizing various byte orders, across all data types (for example, Boolean data to 32 bit float data). Upon receiving the configuration assembly the module must inspect BYTE ORDER to determine how to interpret the configuration assembly.

RSLogix 5000 users will never need to configure the Byte Order bits. For non-RSLogix 5000 users, see the 1794-IF8IH Configuration Data Table

page 29 and 1794-IF8IHNFXT Configuration Data Table on page 31 on

how to map the Byte Order bits.

Two sets of Byte Order bits are provided since the module will not know at powerup and configuration reception what Endian format the configuration data being received is in. No matter what the format, two bit sets will always convey correct information to the module. Both sets must match each other for the module to accept the configuration and begin processing it for operation. If the two sets do not match, the module will revert to the last valid configuration (in

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Configuration 33

case of original startup this would be default configuration) and set module Diagnostic Status to 2, configuration failure.

Reasoning for this configuration parameter: Within the CIP based Rockwell Automation control system all data is transported and utilized in Little Endian format. As such the default mode of operation for these modules will be Little Endian.

Since these modules are HART modules, and HART data is normally provided in Big Endian format, the module will be responsible for converting any HART in Big Endian format into Little Endian format.

Examples

In each of the following examples, the module operates internally with little Endian byte order.

Little Endian Byte Order

If BYTE ORDER indicates Little Endian, utilize the configuration assembly directly.

Partial Configuration Assembly as Received

Partial Configuration Assembly after BYTE ORDER Inspection and Processing

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (2nd byte) Param C CH0 (low byte)

3 Param C CH0 (high byte) Param C CH0 (3rd byte)

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (2nd byte) Param C CH0 (low byte)

3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Provide all data to the Primary Data table in Little Endian byte order. The following two tables are an example of the Primary Input Data, if BYTE ORDER indicated Little Endian.

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

3 Ch2 Data C Ch2 Data B

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34 Configuration

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

3 Ch2 Data C Ch 2 Data B

Word Swap Byte Order

If BYTE ORDER indicates Word Swap, utilize the known structure of the configuration assembly to re-order multi-word data elements to Little Endian byte order, for example, word swap FLOATS.

Partial Configuration Assembly as Received

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (high byte) Param C CH0 (3rd byte)

3 Param C CH0 (2nd byte) Param C CH0 (low byte)

Partial Configuration Assembly after BYTE ORDER Inspection and Processing

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (2nd byte) Param C CH0 (low byte)

3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Provide all data to the Primary Data table in Word Swap byte order, except the MSW and EDT words (Words 0, 1 and 15), these remain in Little Endian byte order.

The following tables are an example of the Primary Input Data, if BYTE ORDER indicated Word Swap.

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

3 Ch2 Data C Ch 2 Data B

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

2 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

3 Ch2 Data C Ch 2 Data B

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Accuracy vs Filter Cutoff for 1794-IF8IH

Configuration 35

Fault Mode (Configuration Word 0, bits 2…5, 10…13)

Selects whether the channel fault detection for Local and Remote Alarms is enabled or disabled. This does not disable High and Low Alarms.

Range: 0=disable, 1=fault detection enabled (remote transmitter loop, wire off and overload or short circuit) Default: 0

Digital Filter (Configuration Words 4…7 – bits 0…2, 8…10)

Digital filter for the channel. This parameter affects channel accuracy. See the following table.

Filter Cutoff

(1)

543210 (Default)

Frequency n/a n/a 470 Hz 62 Hz 19.6 Hz 16.7 hz 10 Hz 4.17 Hz

Word Setting n/a n/a 101 100 011 010 001 000

(1) For settings of 6 and 7 the module will return a configuration error and remain in the last properly configured state.

Accuracy vs Filter Cutoff for 1794-IF8IHNFXT

Filter Cutoff76543210 (Default)

Frequency

n/a

(1)

4.17 Hz 10 Hz 16.7 Hz 19.6 Hz 62 hz 123 Hz 242 Hz

Word Setting n/a 110 101 100 011 010 001 000

(1) Invalid or configuration error.

Value

(1)

Bits

10 9 8

1794-IF8IH Channel Digital Filter

Digital Filter frequency Decimal

210

470 Hz 0 0 0 0

62 Hz 1 0 0 1

19.6 Hz 2 0 1 0

16.7 Hz 3 0 1 1

10 Hz 4 1 0 0

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36 Configuration

Value

(1)

Bits

10 9 8

1794-IF8IH Channel Digital Filter

Digital Filter frequency Decimal

210

4.17 Hz 5 1 0 1

Not applicable 6 1 1 0

Not applicable 7 1 1 1

(1) Channel Digital Filters are represented by Words 4…7 (bits 8…10 and 0…2)

1794-IF8IH Configuration Data Table on page 29.

in the

1794-IF8IHNFXT Channel Digital Filter

Digital Filter frequency Decimal

Value

242 Hz 0 0 0 0

123 Hz 1 0 0 1

62 Hz 2 0 1 0

19.6 Hz 3 0 1 1

16.7 Hz 4 1 0 0

10 Hz 5 1 0 1

4.17 Hz 6 1 1 0

Not applicable 7 1 1 1

(1)

Bits

10 9 8

210

(1) Channel Digital Filters for the 1794-IF8IHNFXT module are represented by Words 4…7

(bits 0…2, and 8…10) of the

1794-IF8IHNFXT Configuration Data Table on page 31.

ADC Conversion Rate, Channel Update Time and Repeatability

The following table shows the channel update time, channel settling time, repeatability, 50 Hz normal mode rejection and 60 Hz normal mode rejection for each A/D conversion rate. The repeatability is based on six-sigma RMS noise levels.

ADC Conversion Rate Effects for the 1794-IF8IH Module

A/D Conversion Rate Channel Update Time Channel Settling Time 50 Hz Rejection 60 Hz Rejection

4.17 Hz 240 ms 480 ms 70 dB 70 dB

10.0 Hz 100 ms 200 ms 65 dB 65 dB

16.7 Hz 60 ms 120 ms 75 dB

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ADC Conversion Rate Effects for the 1794-IF8IH Module

Datatable = 10000

input

(

)

Datatable = 65535

input

(

)

A/D Conversion Rate Channel Update Time Channel Settling Time 50 Hz Rejection 60 Hz Rejection

19.6 Hz 51 ms 101 ms 70 dB

62 Hz 16 ms 32 ms

470 Hz 2 ms 4 ms

ADC Conversion Rate Effects for the 1794-IF8IHNFXT Module

A/D Conversion Rate Channel Update Time Channel Settling Time 50 Hz Rejection 60 Hz Rejection

4.17 Hz 240 ms 480 ms 70 dB 70 dB

10 Hz 100 ms 200 ms 65 dB 65 dB

16.7 Hz 60 ms 120 ms 75 dB

19.6 Hz 51 ms 101 ms 70 dB

62 Hz 16 ms 32 ms

123 Hz 8 ms 17 ms

242 Hz 4 ms 8 ms

Configuration 37

1794-IF8IH Data Formats

Data Format

0 0…20 mA as mA0.1% of

1 0…20 mA

3 0…20 mA as

Format Resolution Input

as %

unsigned integer

(1)

0…20 mA

0.2% of 0…20 mA

0.03% of 0…20 mA

Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…11, 12…15)

Specifies the module data format. If they are selected, a configuration failure will be declared. The configuration is not accepted and the last valid configuration will be used.

Range: 0…15, See the following 1794-IF8IH and 1794-IF8IHNFXT data format tables. Default: 0

Module Data Processing Data Table Value

Range

0…22 mA Datatable = 1000 (input) 0…22000

0…22 mA 0…11000

0…20 mA 0…65535

(Interpretation)

(0…22.000 mA)

(0…110.00%)

(0…20 mA)

Count per mA/ Resolution

1000/

1.0 µA

500/2.0 µA

3276/

0.3052 µA

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38 Configuration

Datatable = 10000

input-4

(

)

Datatable = 65535

input-4

(

)

1794-IF8IH Data Formats

Data Format

4 4…20 mA as mA0.1% of

5 4…20 mA as %0.16% of

7 4…20 mA as

(1) All other formats are invalid.

1794-IF8IH Channel Data Formats

Format

(2)

Format Resolution Input

unsigned integer

Bits Format Name Signal Range User Range Resolution

15 14 13 12

11 10 9 8

(1)

4…20 mA

0.03% of 4…20 mA

Module Data Processing Data Table Value

Range

2…22 mA Datatable = 1000 (input) 2000…22000

2…22 mA -1250 … +11250

4…20 mA 0…65535

(1)

(Interpretation)

(2.000…22.000 mA)

( 2’s co mp le me nt) (-12.50% … +112.50%)

(4…20 mA)

Count per mA/ Resolution

1000/

1.0 µA

625/

1.6 µA

4095/

0.2441 µA

7654 LO HI LO HI

3210

0 00000…20 mA in Milliamps 0.00 22.00 0 (0.000 mA) 22000 (22.000 mA) 1.0 µA

1 00010…20 mA in % Full Scale0.00 22.00 0 (0%) 11000 (110.00%) 2.0 µA

3 00110…20 mA in UINT 0.00 20.00 0 65535 0.3052 µA

4 01004…20 mA in Milliamps 2.00 22.00 2000 (2.000 mA) 22000 (22.000 mA) 1.0 µA

5 01014…20 mA in % Full Scale2.00 22.00 -1250 (-12.50%) 11250 (112.50%) 1.6 µA

7 01114…20 mA in UINT 4.00 20.00 0 65535 0.2441 µA

(1) Channel Data Formats for 1794-IF8IH are represented by Words 2 and 3 in the 1794-IF8IH Configuration Data Table on page 29.

(2) All other formats are invalid.

1794-IF8IHNFXT Data Formats

Data Format

0 0…20 mA as mA 0.00 20.0 0 20000 1.0 μA

1 0…20 mA as % 0.00 20.0 0 10000 2.0 μA

3 0…20 mA as unsigned integer 0.00 20.0 0 65535 0.3052 μA

4 4…20 mA as mA 4.00 20.0 4000 20000 1.0 μA

Format Normal Signal Range Normal User Range Resolution

(1)

LO HI LO HI

5 4…20 mA as % 4.00 20.0 0 10000 1.6 μA

6 4 .. 20 mA Signed 2's Complement 4.00 20.0 0 30840 0.5188 μA

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Configuration 39

1794-IF8IHNFXT Data Formats

Data

Format Normal Signal Range Normal User Range Resolution

Format

(1)

LO HI LO HI

7 4…20 mA as unsigned integer 4.00 20.0 0 65535 0.2441 μA

(1) All other formats are invalid.

1794-IF8IHNFXT Data Formats Full Reporting Range

Data

Format 0.0 mA 2.0 mA 4.0 mA 20.0 mA 21.0 mA 22.0 mA

Format

0 0…20 mA as mA 0 2000 4000 20000 21000 22000

1 0…20 mA as % 0 1000 2000 10000 10500 11000

3 0…20 mA as unsigned integer 0 6554 13107 65535

4 4…20 mA as mA

5 4…20 mA as %

4 .. 20 mA Signed 2's Complement

(1)

7 4…20 mA as unsigned integer

(1) This 4…20 mA format is different from all the other 4…20 mA formats in that it continues to report values all the way down to 0 mA while the other 4…20 mA formats

stop reporting @ 2 mA (except for binary which stops @ 4 mA). In addition, this 4…20 mA format will not force the input value to the Minimum Scale value on an open circuit or short circuit condition.

(2) These values are under or over the supported user range and are clamped at the lowest/highest supported values.

2000

-1250

(2)

2000 4000 20000 21000 22000

-1250 0 10000 10625 11250

-7710 -3855 0 30840 32767

(2)

0 65535

65535

(2)

65535

32767

65535

(2)

1794-IF8IHNFXT Channel Data Formats

(1)

Format Bits Format Name Signal Range User Range Resolution

15 14 13 12

11 10 9 8

7654 LO HI LO HI

3210

0 00000…20 mA in Milliamps 0.00 20.00 0 (0.000 mA) 20000 (20.000 mA) 1.0 µA

1 00010…20 mA in % Full Scale 0.00 20.00 0 (0%) 10500 (105.00%) 2.0 µA

3 00110…20 mA in UINT 0.00 20.00 0 65535 0.3052 µA

4 01004…20 mA in Milliamps 4.00 20.00 4000 (4.000 mA) 20000 (20.000 mA) 1.0 µA

5 01014…20 mA in % Full Scale 4.00 20.00 0 10000 (100.00%) 1.6 µA

6 01104…20 mA Signed 2’s

Complement

7 01114…20 mA in UINT 4.00 20.00 0 65535 0.2441 µA

(1) Channel Data Formats are represented by Words 2 and 3 in the 1794-IF8IHNFXT Configuration Data Table on page 31.

4.00 20.00 0 30840 0.5188 µA

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40 Configuration

Remote Low Low Alarm Limit

This bit parameter exists on both 1794-IF8IH and 1794-IF8IHNFXT configuration but have different configuration word number assignations in the Configuration Data Table. See Data Table Reference below.

Sets the limit for the Remote Fault Low Low alarm. This affects Data Formats 0…7. Steps apply to the 4…20 mA range.

For example, a value of 3600 will cause a Remote Fault Low Low Alarm below

3.6 mA (3600*1 μA=3.6 mA).

Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled

Data Table Reference for 1794-IF8IH: Remote Low Low Alarm Limit, Configuration Words 12, 16, 20, 24, 28, 32, 36 and 40, bits 0…15

Data Table Reference for 1794-IF8IHNFXT: Remote Low Low Alarm Limit, Configuration Words 11, 23, 35, 47, 59, 71, 83, 95, bits 0…15

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Data Formats and Error Ranges

Low Alarm

Remote Alarm

normal signal range

20 mA

0 mA

High Alarm

22 mA

Loop Alarm

Remote Alarm

Format 0 Format 1 Format 3

Data Formats

0.00 mA

0.00 % 0

programmable in

1 µA steps 2 µA steps

0.3502 µA steps

20.00 mA

100.00 % 65,535

programmable in

1 µA steps 2 µA steps

0.3502 µA steps

22.00 mA

110.00 % 22 mA

22 mA

Low Alarm

Remote Alarm

normal signal range

20 mA

0 mA

High Alarm

22 mA

Loop Alarm

Remote Alarm

Format 4 Format 5 Format 7

Data Formats

0.00 mA

-25.00 % 0

programmable in

1 µA steps

1.6 µA steps

0.24 µA steps

20.00 mA

100.00 % 65,535

22.00 mA

112.50 % 22 mA

22 mA

4.00 mA

0.00 % 0

20 mA

programmable in

1 µA steps

1.6 µA steps

0.24 µA steps

4 mA

Low Alarm

Remote Alarm

normal signal range

20 mA

0 mA

High Alarm

21 mA

Loop Alarm

Remote Alarm

Format 6

Data Formats

0.00 mA

-25.00 % 0

programmable in

0.5188 µA steps

20.00 mA

100.00 % 65,535

21 mA

4.00 mA

0.00 % 0

20 mA

programmable in

0.5188 µA steps

4 mA

3.2 mA

-5.00 %

3.2 mA

2 mA

-12.50 % 2 mA

20.8 mA

100.50 %

20.8 mA

22 mA

44780

Configuration 41

Remote High High Alarm Limit

This bit parameter exists on both 1794-IF8IH and 1794-IF8IHNFXT configurations but have different configuration word number assignations in the Configuration Data Table. See Data Table Reference below.

This parameter sets the limit for the Remote Fault High High Alarm. This affects Data Formats 0…7. Steps apply to the 4…20 mA range and 0…20 mA range.

For example, a value of 20400 will cause a Remote Fault High High Alarm above

20.4 mA (20400*1 μA = 20.4 mA).

Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled

Data Table Reference for 1794-IF8IH: Remote High High Alarm Limit, Configuration Words 11, 15, 19, 23, 27, 31, 35 and 39, bits 0…15

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42 Configuration

Data Table Reference for 1794-IF8IHNFXT: Remote High High Alarm Limit, Configuration Words 10, 22, 34, 46, 58, 70, 82, and 94, bits 0…15

Low Alarm Limit

This bit parameter exists on both 1794-IF8IH and 1794-IF8IHNFXT configurations but have different configuration word number assignations in the Configuration Data Tables. See Data Table Reference below.

This parameter sets the limit for the Low Alarm. This affects Data Formats 0…7. Steps apply to the 4…20 mA range.

For example, a value of 4000 will cause an Low Alarm below 4.0 mA (4000*1 μA = 4 mA).

Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled

Data Table Reference for 1794-IF8IH: Low Alarm Limit, Configuration Words 10, 14, 18, 22, 26, 30, 34 and 38, bits 0…15

Data Table Reference for 1794-IF8IHNFXT: Low Alarm Limit, Configuration Words 9, 21, 33, 45, 57, 69, 81, 93, bits 0…15

High Alarm Limit

This parameter sets the limit for the High Alarm. This affects Data Formats 0…7. Steps apply to the 4…20 mA range and 0…20 mA range.

For example, a value of 20000 will cause an High Alarm above 20.0 mA (20000*1 μA = 20 mA).

Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled

Data Table Reference for 1794-IF8IH: High Alarm Limit, Configuration Words 9, 13, 17, 21, 25, 29, 33 and 37, bits 0…15

Data Table Reference for 1794-IF8IHNFXT: High Alarm Limit, Configuration Words 8, 20, 32, 44, 56, 68, 80, 97, bits 0…15

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Configuration 43

HART Disable Channel 0…7 (Configuration Word 1 – bits 8…15)

When this bit is set, the I/O module inhibits HART Communication.

Range: 0= enable, 1= disable Default: 0

HART Current Fault Limit (Configuration Words 4…7 – bits 3…7, 11…15)

This bit parameter applies to 1794-IF8IHNFXT only.

Delivers the percentage value (in steps of 1%, starting @ 5%) of the threshold for causing a HART current fault indication (input signal deviation HART/ Analog ) = 31% maximum deviation.

If there is no HART transmitter on the loop or the loop is not in the transmitter list the function is switched off internally in the I/O module.

Range: 0=disabled, 1…4= not supported by the I/O module. A configuration request of 1…4 will cause a value of 5 to be utilized by the module. 5…31= percentage threshold data (5…31%).

Default: 0

HART Data Publishing Disable

This bit parameter exists on both 1794-IF8IH and 1794-IF8IHNFXT configurations but have different word number assignations in the Configuration Data Table. See Data Table Reference below.

This bit disables the I/O channel from forwarding the associated HART Command 3 information from the HART Field device through Cyclic EDT to the adapter.

This does not disable the module from gathering HART Command 3 information from the HART Field device. As such, HART Command 3 information from the HART Field device is still available via an unconnected message to the module.

When the adapter powers up, it reads each module to find out which modules are present in the flexbus. For EDT modules it reads Assembly 125 to gain knowledge of all the assemblies the module has, whether they are EDT/CEDT and whether they are GET/SET. If an assembly is a CEDT assembly, the adapter

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44 Configuration

automatically creates a CEDT entry and drops it into the EDT machine to gather/send this assembly and store the assembly locally in the adapter.

Sometime later, a ForwardOpen configuration arrives by the network for the module. The adapter proxy strips off a portion (Configuration Part 1) and sends the rest (Configuration Part 2) on through EDT to the module. Within this module configuration part are the CMD3 Disable Chx bits. These bits instruct the module to include or not include CMD3 scanning in the work for the channel. Users may not have HART devices on every channel so some channels may want CMD3 disabled. If scanning is disabled, the module also disables the adapter from including that particular associated assembly in the CEDT scanning routine by the method described below.

The module uses the CMD3 Disable Chx bits to adjust the CEDT entries in Assembly 125. Initially, the Assembly 125 CEDT assemblies (46...53) are identified as CEDT (0xC0 Cyclic EDT Get or 0x40 Cyclic EDT Set). This causes the adapter to add them to the CEDT scan. If the module receives a configuration with CMD3 Disable CHx bits set to “1” (disable), the module changes the appropriate channel’s Assembly 125 entry from 0xC0 Cyclic EDT Get to 0x80 EDT Get or 0x40 Cyclic EDT Set to 0x00 EDT Set.

Whenever the adapter receives a ForwardOpen to an EDT module, the adapter automatically rereads the module’s Assembly 125 to gain a new view of the assemblies. This reread is to check for any changes of CEDT Assemby status to EDT status. If a CMD3 Disable Chx was received on any particular channel, now the previous CEDT assembly is marked as an EDT assembly and the adapter will not add that assembly to his CEDT scan. This ForwardOpen reread will happen any time a module receives a ForwardOpen, including a Null-ForwardOpen received during system runtime.

Range: 0 = enabled, 1 = disabled Default: 0

Data Table Reference for 1794-IF8IH: HART Data Publishing Disable (Cn) Configuration Word 41 – bits 0…7

Data Table Reference for 1794-IF8IHNFXT: HART Data Publishing Disable (Cn) Configuration Word 104 – bits 0…7

Enable HART PV Upper and Lower Range (Configuration Word 105, bits 8...15)

This configuration bit applies only to the 1794-IF8IHNFXT module only.

This bit enables the PV Upper and Lower Range (HART Command 35) values.

See Auto-configure HART Device with user-supplied PV Damping and Range

Va l u e s on page 86 for more information.

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Configuration 45

Range: 0 = true, 1 = false Default: 0

Enable HART PV Damping Value (Configuration Word 105, bits 0…7)

This configuration bit applies to the 1794-IF8IHNFXT module only.

When this bit is set, it automatically configures a HART device with usersupplied PV (Primary Value) Damping by sending HART Command 34 to the device at the time of device connection.

See Auto-configure HART Device with user-supplied PV Damping and Range

Va l u e s on page 86 for more information.

Range: 0 = true, 1 = false Default: 0

Primary Input Data (RTD Input Data) for 1794-IF8IH and 1794-IF8IHNFXT

Primary Input Data for 1794-IF8IH

Word Bit

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

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

8 H7H6 H5H4H3H2H1H0L7 L6 L5 L4 L3L2L1 L0

9 R7R6 R5R4R3R2R1R0P7 P6P5P4 P3 P2P1 P0

10 Reserved Diagnostic Status

11 C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0

12 X7 X6 X5 X4 X3 X2 X1 X0 Reserved

Where: Hn: Channel n High Alarm

Ln : Channel n Low Alarm Rn : Channel n Out of Range Alarm Pn : Channel n Second (Remote) Alarm Fn : Channel n HART Failure Cn : Channel n HART Current Fault Xn : Channel n HART Transmitter Present

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46 Configuration

Primary Input Data for 1794-IF8IHNFXT

Word Bit

151413121110987 654 321 0

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

8 H7H6 H5H4H3H2H1H0L7 L6 L5 L4 L3 L2 L1 L0

9 R7R6 R5R4R3R2R1R0P7 P6P5 P4 P3P2P1 P0

10 X7 X6 X5 X4 X3 X2 X1 X0 Diagnostic Status

11 C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0

Where: Hn: Channel n High Alarm

Ln : Channel n Low Alarm Rn : Channel n Out of Range Alarm Pn : Channel n Second (Remote) Alarm Fn : Channel n HART Failure Cn : Channel n HART Current Fault Xn : Channel n HART Transmitter Present

Primary Input Data (Input Words 0…7 – bits 0…15)

Specifies the value of the input data from the module. Specific format is controlled by module Data Format Control parameter.

Range: Refer to Data Format (8 of 4 bits) on page 37

Module Diagnostic Status (Input Word 10 – bits 0…7)

Response from module on its condition.

Diagnostic Status for 1794-IF8IH and 1794-IF8IHNFXT

Diagnostic Status Value: 0 Channel Failure

0x00 All No Errors (default)

0x10 Channel 0 HART Iloop Threshold Configuration Error

0x11 Channel 1 HART Iloop Threshold Configuration Error

0x12 Channel 2 HART Iloop Threshold Configuration Error

0x13 Channel 3 HART Iloop Threshold Configuration Error

0x14 Channel 4 HART Iloop Threshold Configuration Error

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Configuration 47

Diagnostic Status for 1794-IF8IH and 1794-IF8IHNFXT

Diagnostic Status Value: 0 Channel Failure

0x15 Channel 5 HART Iloop Threshold Configuration Error

0x16 Channel 6 HART Iloop Threshold Configuration Error

0x17 Channel 7 HART Iloop Threshold Configuration Error

0x20 Channel 0 Remote/Local Alarm Configuration Error

0x21 Channel 1 Remote/Local Alarm Configuration Error

0x22 Channel 2 Remote/Local Alarm Configuration Error

0x23 Channel 3 Remote/Local Alarm Configuration Error

0x24 Channel 4 Remote/Local Alarm Configuration Error

0x25 Channel 5 Remote/Local Alarm Configuration Error

0x26 Channel 6 Remote/Local Alarm Configuration Error

0x27 Channel 7 Remote/Local Alarm Configuration Error

0x30 Channel 0 High/Low Alarm Configuration Error

0x31 Channel 1 High/Low Alarm Configuration Error

0x32 Channel 2 High/Low Alarm Configuration Error

0x33 Channel 3 High/Low Alarm Configuration Error

0x34 Channel 4 High/Low Alarm Configuration Error

0x35 Channel 5 High/Low Alarm Configuration Error

0x36 Channel 6 High/Low Alarm Configuration Error

0x37 Channel 7 High/Low Alarm Configuration Error

0x40 Channel 0 Format Configuration Error

0x41 Channel 1 Format Configuration Error

0x42 Channel 2 Format Configuration Error

0x43 Channel 3 Format Configuration Error

0x44 Channel 4 Format Configuration Error

0x45 Channel 5 Format Configuration Error

0x46 Channel 6 Format Configuration Error

0x47 Channel 7 Format Configuration Error

0x50 Channel 0 ADC Filter Configuration Error

0x51 Channel 1 ADC Filter Configuration Error

0x52 Channel 2 ADC Filter Configuration Error

0x53 Channel 3 ADC Filter Configuration Error

0x54 Channel 4 ADC Filter Configuration Error

0x55 Channel 5 ADC Filter Configuration Error

0x56 Channel 6 ADC Filter Configuration Error

0x57 Channel 7 ADC Filter Configuration Error

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48 Configuration

Diagnostic Status for 1794-IF8IH and 1794-IF8IHNFXT

Diagnostic Status Value: 0 Channel Failure

0x70

(1)

Channel 0 PV Configuration Enable selected with

HART Disabled

0x71

(1)

Channel 1 PV Configuration Enable selected with

HART Disabled

0x72

(1)

Channel 2 PV Configuration Enable selected with

HART Disabled

0x73

(1)

Channel 3 PV Configuration Enable selected with

HART Disabled

0x74

(1)

Channel 4 PV Configuration Enable selected with

HART Disabled

0x75

(1)

Channel 5 PV Configuration Enable selected with

HART Disabled

0x76

(1)

Channel 6 PV Configuration Enable selected with

HART Disabled

0x77

(1)

Channel 7 PV Configuration Enable selected with

HART Disabled

0x80 Module Hardware Failure

0x90 Channel 0 Calibration Error

0x91 Channel 1 Calibration Error

0x92 Channel 2 Calibration Error

0x93 Channel 3 Calibration Error

0x94 Channel 4 Calibration Error

0x95 Channel 5 Calibration Error

0x96 Channel 6 Calibration Error

0x97 Channel 7 Calibration Error

0xA0 Channel 0 Internal Bus Com Error

0xA1 Channel 1 Internal Bus Com Error

0xA2 Channel 2 Internal Bus Com Error

0xA3 Channel 3 Internal Bus Com Error

0xA4 Channel 4 Internal Bus Com Error

0xA5 Channel 5 Internal Bus Com Error

0xA6 Channel 6 Internal Bus Com Error

0xA7 Channel 7 Internal Bus Com Error

0xB0

0xB1

0xB2

0xB3

0xB4

(2)

Channel 0 Value set to nearest supported value.

Channel 1 Value set to nearest supported value.

Channel 2 Value set to nearest supported value.

Channel 3 Value set to nearest supported value.

Channel 4 Value set to nearest supported value.

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Configuration 49

Diagnostic Status for 1794-IF8IH and 1794-IF8IHNFXT

Diagnostic Status Value: 0 Channel Failure

0xB5

0xB6

0xB7

(2)

Channel 5 Value set to nearest supported value.

Channel 6 Value set to nearest supported value.

Channel 7 Value set to nearest supported value.

OxC0 Channel 0 Device is write-protected

OxC1 Channel 1 Device is write-protected

OxC2 Channel 2 Device is write-protected

OxC3 Channel 3 Device is write-protected

OxC4 Channel 4 Device is write-protected

OxC5 Channel 5 Device is write-protected

OxC6 Channel 6 Device is write-protected

OxC7 Channel 7 Device is write-protected

0xD0 Channel 0 Value out of limits or invalid selection

0xD1 Channel 1 Value out of limits or invalid selection

0xD2 Channel 2 Value out of limits or invalid selection

0xD3 Channel 3 Value out of limits or invalid selection

0xD4 Channel 4 Value out of limits or invalid selection

0xD5 Channel 5 Value out of limits or invalid selection

0xD6 Channel 6 Value out of limits or invalid selection

0xD7 Channel 7 Value out of limits or invalid selection

0xE0 Channel 0 Primary value configuration HART

command(s) not supported

0xE1 Channel 1 Primary value configuration HART

command(s) not supported

0xE2 Channel 2 Primary value configuration HART

command(s) not supported

0xE3 Channel 3 Primary value configuration HART

command(s) not supported

0xE4 Channel 4 Primary value configuration HART

command(s) not supported

0xE5 Channel 5 Primary value configuration HART

command(s) not supported

0xE6 Channel 6 Primary value configuration HART

command(s) not supported

0xE7 Channel 7 Primary value configuration HART

command(s) not supported

0xF0 Channel 0 Primary value configuration general error

0xF1 Channel 1 Primary value configuration general error

0xF2 Channel 2 Primary value configuration general error

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50 Configuration

Diagnostic Status for 1794-IF8IH and 1794-IF8IHNFXT

Diagnostic Status Value: 0 Channel Failure

0xF3 Channel 3 Primary value configuration general error

0xF4 Channel 4 Primary value configuration general error

0xF5 Channel 5 Primary value configuration general error

0xF6 Channel 6 Primary value configuration general error

0xF7 Channel 7 Primary value configuration general error

(1) This does not apply to the output control bits HART OFF which means HART can still be disabled which would

prevent the PV Configuration feature from working until the control bit is cleared.

(2) Applies to 1794-IF8IHNFXT only.

HART Failure (Input Word 11 – bits 0…7)

This bit indicates each time a HART communication failure is detected between the module and the HART field device (HART FD) on the channel. This failure could be due to some of the following reasons: time out, response checksum, parity, framing, HART FD missing, HART FD mismatch from device detected at last rebuild. If there is a failure, the appropriate channel’s bit is set. The bit is not latched.

The I/O module performs automatic retries and therefore a user should rarely recognize communication problems at the protocol layer. Therefore, this flag can be used to qualify the communication quality.

Range: 0 = No HART failures are detected, 1 = HART failure is detected

HART Current Ratio (Input Word 11 – bits 8…15)

Alarm signal for HART Current Fault, indicating the HART data value is outside the HART Current Fault limit percentage. Active when limit is exceeded. The analog measured current is compared with the digital current value, read out dynamically via the HART interface. Active when limit is exceeded. See HART

Current Fault Limit (Configuration Words 4…7 – bits 3…7, 11…15) on page 43.

Range: 0 = normal, 1 = fault detected.

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Configuration 51

1794-IF8IH HART Current Ratio

HART Current Ratio Limit Decimal

Disabled 0 0 0 0 0 0

Not applicable 1 0 0 0 0 1

Not applicable 2 0 0 0 1 0

Not applicable 3 0 0 0 1 1

Not applicable 4 0 0 1 0 0

5% 5 00101

6% 6 00110

7% 7 00111

8% 8 01000

9% 9 01001

10% 10 0 1 0 1 0

… … ……………

30% 30 1 1 1 1 0

31% 31 1 1 1 1 1

(1)

Value

Bits

15 14 13 12 11

76543

Secondary Input Data (Cyclic EDT Input Data) for 1794-IF8IH and 1794IF8IHNFXT

(1) HART Current Ratio is represented by Words 4…7 (bits 11…17 and 3…7) in the

Data Table on page 29.

1794-IF8IH Configuration

HART Transmitter List (Input Word 10 – bits 8…15)

Indicates a HART transmitter has been detected on this channel, during the last rebuild.

Range: 0 = A HART Transmitter was not detected, 1 = A HART Transmitter is detected.

The data in the following table is where the HART protocol device data is published. The data table is not available as a group in the module. It is formed in the communication adapter by the Cyclic EDT mechanism (adapter to module) where the adapter cyclically requests a set of module attributes and forms this data table.

Additionally, the adapter appends the first two words to indicate communication status between adapter and module with regard to each of the cyclic EDT transfers. Two (2) words are provided, for status, as today’s adapters provide for up to 32 items in the CEDT queue.

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For this module the total Secondary Input Data Table (I) Words = 98, as shown in the HART Input Data table.

Secondary Input Data (Cyclic Input Data) for the 1794-IF8IH and 1794-IF8IHNFXT Modules

Word Bit

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0/I Reserved Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0

HART CMD 3 (Communications Status)

1Reserved

2 Ch0 HART Field Device Status Ch0 HART Comm Status

3 Reserved FVA TVA SVA PVA Ch0 HART Loop Status

4 Ch0 HART Primary Value (IEEE 754-1985 Single-Precision 32 bit floating point)

6 Ch0 HART Secondary Value (IEEE 754-1985 Single-Precision 32 bit floating point)

8 Ch0 HART Tertiary Value (IEEE 754-1985 Single-Precision 32 bit floating point)

10 Ch0 HART Fourth (Quaternary) Value (IEEE 754-1985 Single-Precision 32 bit floating point)

12 Ch0 SV Units Code Ch0 PV Units Code

13 Ch0 FV Units Code Ch0 TV Units Code

14…25 Words 2…13 for Channel 1

26…37 Words 2…13 for Channel 2

38…49 Words 2…13 for Channel 3

50…61 Words 2…13 for Channel 4

62…73 Words 2…13 for Channel 5

74…85 Words 2…13 for Channel 6

86…97 Words 2…13 for Channel 7

HART Command 3 Communication Status (Secondary Input Word 0, bits 0…7)

These bits indicate status of the CEDT data transfer between the adapter and the modules. In this module the CEDT attributes transferred are HART command 3 data for the indicated channel number.

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Configuration 53

IMPORTANT

Range: 0 = disabled or no CEDT HART Command 3 Communication error between the adapter and the I/O module, 1= a CEDT HART Command 3 Communication error between the adapter and the I/O module.

HART Field Device Command and Communication Status (Secondary Input Word 2, bits 0…7)

This bit indicates the status of HART field device communication for the channel. It is the first status byte of the HART response and the field device status. For example: parity error, framing error, invalid selection or too few data bytes received.

HART Field Device Status (Secondary Input Word 2 – bits 8…15)

This bit is part of the CMD 3 data response of the HART FD. It is the second status byte of the HART response and the FD status, for example: primary variable out of limits or analog output saturated.

CMD3 Second status byte response codes

HART Field Device Status

Bit 0 Primary variable out of limits

Bit 1 Non-primary variable out of limits

Bit 2 Analog output saturated

Bit 3 Analog output current fixed

Bit 4 More status available

Bit 5 Cold start

Bit 6 Configuration changed

Bit 7 Field device malfunction

When a communication error is reported in the CMD 3 first status byte, the value of bits 0...7 is 0.

Data Table Reference: HART Field Device Status, Secondary Input Word 2, bits 8…15.

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HART Loop Status (Secondary Input Word 3 – bits 0…7)

This bit indicates the status of the HART loop from the I/O modules point of view. This byte is generated by the I/O module itself and not by the HART field device.

HART Loop Status

Bit 0

Bit 1 HCS_CONNECTED. A connection has been established with this device.

Bit 2 HCS_RESPONSE_ERROR. A HART message attempt ended in failure.

Bit 3 HCS_CMD48_UPDATE. Extended HART status (Command 48) was updated.

(1)

HCS_COMM_ENABLED, HART is enabled on this channel.

Range: 0 = HART not enabled on this channel, 1 = HART enabled on this channel

Range: 0 = no HART connection on this channel, 1 = HART connection on this channela

Range: 0 = no HART message failures, 1 = HART message attempt failed

Range: 0 = extended HART status (Command 48) was not updated, 1 = extended HART status (Command 48) was updated

Bit 4 HCS_ILOOP_TOLERANCE. HART Current Fault loop current fault.

Range: 0 = no HART Current Fault loop current fault, 1 = HART Current Fault loop current fault

Bit 5 HART_update. The HART Field Device data for the channel has been updated

since last read. Range: 0 = no HART FD data update, 1 = new HART FD data available

Bit 6 HART_Message. The channel’s HART message queue has completed a message

since request has been received. Range: 0 = no HART message has completed, 1 = a HART message has completed

Bit 7 Reserved (for 1794-IF8IH and 1794-OF8IH)

PV Configuration Values do not match (for 1794-IF8IHNFXT) Range: 0 = No mismatch, 1 = PV Damping/Range mismatch

(1) HCS - HART Communications State machine.

HART PV Status (Secondary Input Word b, bits 8…15)

This bit indicates the status of the HART variables (primary, secondary, third and fourth).

HART PV Status

Bit 0 The primary variable for this channel has been acquired.

Bit 1 The secondary variable for this channel has been acquired.

Bit 2 The third variable for this channel has been acquired.

Bit 3 The fourth variable for this channel has been acquired.

Bit 4 Reserved

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Configuration 55

HART PV Status

Bit 5 Reserved

Bit 6 Reserved

Bit 7 Reserved

HART Primary Variable (Secondary Input Words 4, 5 – bits 0…15)

This is the Primary HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (Configuration Word

0 – bits 0…1, 8…9).

HART Secondary Variable (Secondary Input Words 6, 7 – bit 0…15)

This is the Secondary HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (Configuration Word

0 – bits 0…1, 8…9).

HART Third Variable (Secondary Input Words 8, 9 – bits 0…15)

This is the Third HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (Configuration Word 0 –

bits 0…1, 8…9).

HART Fourth Variable (Secondary Input Words 10, 11 – bits 0…15)

This is the Fourth HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (Configuration Word

0 – bits 0…1, 8…9).

HART Primary Variable Units Code (Secondary Input Word 12 – bits 0…7)

This is the units code for the Primary HART Variable.

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56 Configuration

HART Secondary Variable Units Code (Secondary Input Word 12 – bits 8…15)

This is the units code for the Secondary HART Variable.

HART Third Variable Units Code (Secondary Input Word 13 – bits 0…7)

This is the units code for the Third HART Variable.

HART Fourth Variable Units Code (Secondary Input Word – bits 8…15)

This is the units code for the Fourth HART Variable.

RTD Output Data for

Output data consists of the EDT Write Word and the HART Control Word.

1794-IF8IHNFXT

RTD Output Data Table – 1794-IF8IHNFXT

Word Read /

Write

14 / EDT Write RealT R/P Flt Reserved EDT COntr EDT Write Data

15 / O:0 Write RealT Reserved HO7 HO6 HO5 HO4 HO3 HO2 HO1 HO0

Where: Flt = Fault

R = Reserved HO = HART Off Dynamic Control bit. This HART Off control output bit, along with the HART Disable configuration bit, determines if HART communication is enabled on a channel. The HART Disable configuration bit has priority and disables all communication on a channel at all times even when the HART Off output bit is False(0). If the HART Disable configuration bit is False(0), then the HART OFF output control bit can be used to dynamically turn HART Off and back On again at any time.

Module Configuration for

Data Type Bit

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

Output Connections

the 1794-OF8IH

The 1794-OF8IH module uses the 1794-TB3, Revision B terminal base for full isolation. Connect the I+ output to the terminal contacts indicated and the corresponding center return (R) contact. Be sure to observe the polarity indicated for proper operation. Channels are numbered in order, 0…7, from left to right.

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Configuration 57

0-15

16-33

-Vin -V

C O M M O N S

+Vin +V

34-51

10325476981110 1312 1514

2928 3130 33322322 2524 27261716

CH-0

1918 2120

4746 4948 51504140 4342 45443534 3736 3938

CH-1 CH-2 CH-3 CH-4 CH-5 CH-6 CH-7

1794-OF8IH Terminal Base Connections

Connect an external 24 V DC power supply to terminals 34 (V+) and 16 (V-) observing polarities indicated. Terminals 17…33 are internally shorted to terminal 16. Terminal 51 is internally shorted to terminal 34. Use the DC output terminals only for low power modules, following FLEX I/O power connection guidelines.

Please follow wiring instruction for FLEX I/O modules, terminal bases and racks. Ground the shield drain wire at one end only. The preferred/required location is at the sensor end. When connecting the shield drain at the module end, connect it to earth ground using a panel or DIN rail mounting screw.

Configuration Parameters for 1794-OF8IH

The last row of the following configuration table provides a brief description of each configuration parameter bit for the 1794-OF8IH module. The next sections provide more information about each bit.

All configuration parameters are EDT (Extended Data Transfer) WRITE items. Configuration is located at EDT assembly 37.

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1794-OF8IH Configuration Data Table

Word Bit

1514131211109876543210

0 FT R EW7 EW6 EW5 EW4 BOB

1 DH7 DH6 DH5 DH4 DH3 DH2 DH1 DH0 Reserved

2 CH 3 Format CH 2 Format CH 1 Format CH 0 Format

3 CH 7 Format CH 6 Format CH 5 Format CH 4 Format

4 CH1 HART Current Ratio L1 AFS1 CH0 HART Current Ratio L0 AFS0

5 CH3 HART Current Ratio L3 AFS3 CH2 HART Current Ratio L2 AFS2

6 CH5 HART Current Ratio L5 AFS5 CH4 HART Current Ratio L4 AFS4

7 CH7 HART Current Ratio L7 AFS7 CH6 HART Current Ratio L6 AFS6

8 DF7 DF6 DF5 DF4 DF3 DF2 DF1 DF0 DM7 DM6 DM5 DM4 DM3 DM2 DM1 DM0

9 Channel 0 Analog Fault Value Output Data

10 Channel 1 Analog Fault Value Output Data

11 Channel 2 Analog Fault Value Output Data

12 Channel 3 Analog Fault Value Output Data

13 Channel 4 Analog Fault Value Output Data

14 Channel 5 Analog Fault Value Output Data

15 Channel 6 Analog Fault Value Output Data

16 Channel 7 Analog Fault Value Output Data

17 Reserved C7 C6 C5 C4 C3 C2 C1 C0

Where: BOA = Byte Order Group A

(1) Not supported in analog 0…20 mA formats.

(2) Lead break must be present for 100 ms or more.

(3) Not shown or used in RSLogix 5000 software.

(4) Reserved data may not be shown in certain controller software.

BOB = Byte Order Group B Byte Order Group A and B values must match each other. Refer to the Byte Order table.

FT = Local Fault Mode 0: Outputs set to safe value on communication faults only; 1: Outputs set to safe value on any fault

EWn = Fault Enable for wire fault detection on channel n. 0: Disable wire off/lead break detection; 1: Enable wire off lead break detection

CHn HART Current Ratio = HART current fault ratio on channel n Valid values are 0, 5…31 percent of full scale. A value of 0 disables this feature. See 1794-OF8IH HART Current Ratio

AFSn = Analog Fault Selection for Channel n See Channel Fault Mode Selection

Ln = Channel n Enable Latching of Wire Fault 0: Unlatched; 1: Latched

DFn = Channel n Digital Fault Mode Selection 0: Reset (0 mA); 1: Hold Last State

DMn = Channel n Enable Digital Mode 0: Analog; 1: Digital

Fn = Fault mode channel n 0: Local/Remote faults disabled; 1: Enabled

DHn = Disable HART communications on channel n 0: HART communications enabled; 1: HART communications disabled

Cn = HART CMD 3 Disable 0: HART CMD 3 communications enabled; 1: HART CMD 3 communications disabled

R = Reserved

CH N = Channel Data Formats See Channel Data Formats for 1794-OF8IH

on page 62.

on page 65.

(1)

(3)

R R EW3 EW2 EW1 EW0 BOA

(4)

(2)

on page 63 for more information.

(1)

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Configuration 59

IMPORTANT

Configuration Parameter Descriptions for 1794-OF8IH

This section provides a description of each configuration parameter bit indicated in the table 1794-OF8IH Configuration Data Table

on page 58.

Byte Order (Configuration Word 0 – bits 0…1, 8…9)

Selects the byte order of module data. Note: The MSW and EDT words (Words 0, 1 and 15) of the Primary Input Data Table are not swapped. All other Primary Input Data and Configuration Data are adjusted according to the following chart:

Byte Order Group B

Bit 9 Bit 8 Bit 1 Bit 0 Description

0000Little Endian Format (default) — all data entries in

1010Word Swap — word swap only values requiring

0101Byte Swap — byte swap all words in data table.

1111Big Endian Format — all data entries in true Big

Byte Order Group A

true Little Endian format

more than one word, for example, 32 bit float values.

Endian format.

Byte Order can not be changed using RSLogix 5000 software. RSLogix 5000 uses the default Byte Swap setting.

Upon receiving the configuration assembly the module must inspect Byte Order to determine how to interpret the configuration assembly.

Two sets of Byte Order bits are provided since the module will not know at powerup and configuration reception what Endian format the configuration data it is receiving in. No matter what the format though these two, two bit sets always convey correct information to the module. Both sets must match each other for the module to accept the configuration and begin processing it for operation. If the two sets do not match the module reverts to the last valid configuration (in case of original start-up this is the default configuration), set module Diagnostic Status to "2" configuration failure, set outputs to fault states and do not start operation.

Within the CIP-based Rockwell Automation (RA) control system all data is transported and utilized in Little Endian format. As such the default mode of operation for these modules is Little Endian.

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Since these modules are HART modules, and HART data is normally provided in Big Endian format, the module is responsible for converting any HART in Big Endian format into Little Endian format.

Examples

In each of the following examples, the module operates internally with little Endian byte order.

Little Endian Byte Order

If Byte Order indicates Little Endian, utilize the configuration assembly directly.

Partial Configuration Assembly as Received

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (2nd byte) Param C CH0 (low byte)

3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Partial Configuration Assembly after BYTE ORDER Inspection and Processing

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (2nd byte) Param C CH0 (low byte)

3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Provide all data to the Primary Data table in Little Endian byte order. The following two tables are an example of the Primary Input Data, if Byte Order indicated Little Endian.

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

3 Ch2 Data C Ch 2 Data B

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

3 Ch2 Data C Ch 2 Data B

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Configuration 61

Word Swap BYTE ORDER

If BYTE ORDER indicates Word Swap, utilize the known structure of the configuration assembly to re-order multi-word data elements to Little Endian byte order, for example, word swap FLOATS).

Partial Configuration Assembly as Received

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (high byte) Param C CH0 (3rd byte)

3 Param C CH0 (2nd byte) Param C CH0 (low byte)

Partial Configuration Assembly After BYTE ORDER Inspection and Processing

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1

2 Param C CH0 (2nd byte) Param C CH0 (low byte)

3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Provide all data to the Primary Data table in Word Swap byte order, except the MSW and EDT words (Words 0, 1 and 15), these remain in Little Endian byte order.

The following tables are an example of the Primary Input Data, if BYTE ORDER indicated Word Swap.

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

3 Ch2 Data C Ch 2 Data B

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte)

2 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte)

3 Ch2 Data C Ch 2 Data B

Default: 0

Fault Mode (Configuration Word 0 – bit 15)

Selects whether the channel fault detection is enabled or disabled. There is a 100 ms filter for wire off/lead break and short circuit detection.

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Range: 0=Disable, 1= Wire off/lead break and short circuit fault detection enabled. Default: 0

Channel Fault Mode Selection

Analog Fault Mode Decimal Value Bits

Min Scale 0 0 0

Max Scale 1 0 0

Hold Last State 2 1 0

User Specifed Data Value 3 1 1

Disable HART Channel 0…7 (Configuration Word 17 – bits 0…7)

When this bit is set, the I/O module inhibits HART Communication.

Range: 0=Enable, 1=Disable Default: 0

HART Current Ratio (Configuration Words 4…7 – bits 3…7, 11…15.)

Delivers the percentage value (in steps of 1%, starting @ 5%) of the threshold for causing a HART current fault indication (input signal deviation HART/ Analog) = 31% maximum deviation.

If there is no HART transmitter on the loop or the loop is not in the transmitter list the function is switched off internally in the I/O module.

Range: 0=Disabled, 1…4=Not supported by the I/O module. A configuration request of 1…4 causes a value of 5 to be utilized by the module. 5…31=Percentage threshold data (5…31%) Default: 0

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Configuration 63

1794-OF8IH HART Current Ratio

HART Current Ratio Limit

Disabled 0 0 0 0 0 0

Not applicable 1 0 0 0 0 1

Not applicable 2 0 0 0 1 0

Not applicable 3 0 0 0 1 1

Not applicable 4 0 0 1 0 0

5% 5 00101

6% 6 00110

7% 7 00111

8% 8 01000

9% 9 01001

10% 10 0 1 0 1 0

… … ……………

30% 30 1 1 1 1 0

31% 31 1 1 1 1 1

Decimal Value

(1)

Bits

15 14 13 12 11

76543

(1) HART Current Ratio parameter bits are represented by Configuration Words 4, 5, 6, and 7,

bits 3…7, 11…15. See 1794-OF8IH Configuration Data Table

on page 58.

Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…10, 12…15)

Specifies the module data format for a channel.

If a module channel has never been configured then it 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 goes to the default fault state minimum range.

If, on the other hand, the configuration is changed from the default, and then 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.

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64 Configuration

Output =

datatable

(

1000

)

Output = 20

datatable

(

10000

)

Output = 20

datatable

(

65535

)

Output =

datatable

(

1000

)

Output = 16

datatable

(

65535

)

+ 4

Output = 16

datatable

(

10000

)

+ 4

1794-OF8IH Data Formats

Range: 0…15. Refer to the 1794-OF8IH Data Formats table.

Data Format

0 (default) mA as

1 % as

2 0…20 mA — 0…22 mA Not Assigned 3 Unsigned

4mA as

5 4…20 mA — 4…20 mA Not assigned 6 4…20 mA 4…20 mA Not assigned 7 Unsigned

8 0…20 mA 0…20 mA Not assigned 9 0…20 mA 0…20 mA Not assigned 10 0…20 mA 0…20 mA Not assigned 11 0…20 mA 0…20 mA Not assigned 12 4…20 mA Not assigned 13 4…20 mA Not assigned 14 % as

15 4…20 mA 4…20 mA Not assigned

Format Resolution Full Output

0…20 mA

integer as 0…20 mA

4…20 mA

integer as 4…20 mA

4…20 mA

0.1% of 0…20 mA

0.2% of 0…20 mA

0.03% of 0…20 mA

0.1% of 4…20 mA

0.03% of 4…20 mA

0.16% of 4…20 mA

Range

0…22 mA 0…22000

0…22 mA 0…11000

0…20 mA 0…65535

2…22 mA 2000…22000

4…20 mA 0…65535

2…22 mA -1250 … +11250

Module Data Processing Data Table Value

(Interpretation)

(0…22.000 mA)

(0…110.00%)

(0…20 mA)

(2.000…22.000 mA)

(4…20 mA)

(2’s complement) (-12.50% … +112.50%)

Count per mA/ Resolution

1000/

1.0 µA

500/

2.0 µA

3276/

0.305 µA

1000/

1.0 µA

4095/

0.244 µA

625/

1.6 µA

Analog Fault State

Min=0 mA Max=22 mA hold Last=hold FS value

Min=0 mA Max=20 mA hold Last=hold FS value

Min=2 mA Max=22 mA hold Last=hold FS value

Min=4 mA Max=20 mA hold Last=hold FS value

Min=2 mA Max=22 mA hold Last=hold FS value

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Configuration 65

Channel Data Formats for 1794-OF8IH

(2)

Format

Bits Format Name Signal

15 14 13 12

(1)

User Range Resolution

Range

11 10 9 8

7 6 5 4 LO HI LO HI

3210

0 0 0 0 0 0…20 mA in Milliamps 0.00 22.00 0 (0.000 mA) 22000 (22.000 mA) 1.0 µA

1 0 0 0 1 0…20 mA in % Full Scale 0.00 22.00 0 (0%) 11000 (110.00%) 2.0 µA

3 0 0 1 1 0…20 mA in UINT 0.00 20.00 0 65535 0.3052 µA

(3)

(2)

(1) Data Format configuration bits are represented by Configuration Words 2 and 3, bits 0…3, 4…7, 8…11, and 12…15. See 1794-OF8IH Configuration Data Table on

page 58.

(2) All other formats are invalid.

(3) HART Communications supported with these data formats only.

0 1 0 0 4…20 mA in Milliamps 2.00 22.00 2000 (2.000 mA) 22000 (22.000 mA) 1.0 µA

0 1 1 1 4…20 mA in UINT 4.00 20.00 0 65535 0.2441 µA

1 1 1 0 4…20 mA in % Full Scale 2.00 22.00 -1250 (-12.50%) 11250 (112.50%) 1.6 µA

If data is sent to the module which is out of range, the value is clipped and Diagnostic Data is set to “11” data out of range. To view a graphical representation of this performance, see the example on page 11

Latch Mode (Configuration Words 4…7 – bits 2, 10)

Latch Mode determines channel operation under wire off/lead break fault conditions. Channel fault detection occurs on a continuous basis. If a fault is detected, the channel fault alarm is set (if Fault Mode is enabled).

If latch is ON the fault is latched until a Global Reset is issued at which time the fault is reset.

If latch is OFF the channel reports the fault until the fault is corrected. Upon correction the fault is reset.

Range: 0=OFF, 1=ON Default: 0

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66 Configuration

45287

FAULT_ALARM_0

FAULT_LED_0

CHANNEL_0

GLOBAL_RESET

LATCH_MODE_0

FAULT_MODE_0

SHRT_CRKT_0

LB_0

LOCAL_FAULT_MODE_0

PROG/RUN (EDT word Bit 15)

FAULT (EDT word Bit 14)

BUS_COM_FAULT, other internal module faults

ANALOG_DIGITAL_MODE_0

ANALOG_FAULT_STATE_0

DIGITAL_FAULT_STATE_0

OUT_0

ANALOG_FAULT_STATE_VALUE_0

Analog/Digital Output Normal and Fault State Operation

Normal State

Value





Fault



Reset

Hold Last



MIN Range



MAX Range



Hold Last

Fault State Value



Output Mode



(Analog/Digital)





Fault State

Value





  

100 ms



Filter



 

Latch



Mode



Reset

Blink



Timer



Analog/Digital Output Mode (Configuration Word 8 – bits 0…7)

Selects if the channel acts as a normal analog output or as a switched digital output.

Analog Output Mode will follow the Analog Data Format selected.

Digital Output Mode will output 0 mA = OFF, 22 mA = ON if the Fault Mode is 0 = Disable. Digital Output Mode will output 500 μA = OFF, 22 mA = ON if the Fault Mode is 1 = Wire off fault detection enable.

Range: 0=Normal analog output, 1=Switched digital output Default: 0

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Configuration 67

Analog Fault Mode Selection (Configuration Words 4…7 – bits 0…1, 8…9)

Determines how the module reacts to faults when channel is used in analog normal mode.

Range: 0=Go to minimum value of Full Output Range, 1=Go to maximum value of Full Output Range, 2=Hold last state, 3=Use channel fault state values given in Words 10…17. Default: 0

Analog Fault Value Output Data (Configuration Words 9…16 – bits 0…15)

This parameter specifies the fault state value of the analog output data for the channel. Specific format is controlled by Analog Data Format Control parameter, see Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…10, 12…15)

page 63.

This data is used when the channel is in analog output mode.

Examples

If you choose format 2 and set the fault state value to 11000 (accordingly

110.00%), the I/O module provides 22 mA in case of fault state.

If you choose format 7 and set the fault state value to 32000, the I/O module provides 11.813 mA in case of fault state.

The fault state value is treated in the same way as the normal output value is treated. So you do not need to recalculate the current when you are used to work in a special format.

Range: See Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…10, 12…15) on page 63.

Default: 0

Digital Mode Fault State (Configuration Word 8 – bit 8…15)

Determines how the module reacts to faults when channel is used in digital mode.

Range: 0=Reset, 1=Hold Last State Default: 0

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68 Configuration

HART CMD 3 Disable (Configuration Word 7 – bits 0…7)

This bit disables the I/O channel from forwarding the associated HART Command 3 information from the HART Field device through Cyclic EDT to the adapter.

This feature should be exercised by using a Null ForwardOpen method in the Logix system. That is, the connection to the module and original configuration has already been accomplished. If utilized, Command 3 Disable should be utilized under program control (change bit in module configuration tag then issue reconfiguration message to module) or, more unusually, a manual operation by an operator (open module profile, change parameter then apply).

When the adapter powers up, it reads each module to find out who is out there. For EDT modules, it reads Assembly 125 to gain knowledge of all the assemblies the module has, whether they are EDT/CEDT and whether they are GET/SET. If an assembly is a CEDT assembly, the adapter automatically creates a CEDT entry and drops it into his EDT machine to gather/send this assembly and store the assembly locally in the adpater.

After this powerup process, a ForwardOpen configuration arrives by the network for the module. The adapter proxy strips off a portion (Configuation Part 1) and sends the rest (Configuration Part 2) on through EDT to the module. Within this module configuration part are the CMD3 Disable Chx bits. These bits instruct the module to include or not include CMD3 scanning in its work for the channel. Users may not have HART devices on every channel so some channels may want CMD3 disabled.

If users do disable scanning, the module also disables the adapter from including that particular associated assembly in the CEDT scanning routine by the following method:

The module uses the CMD3 Disable Chx bits to adjust the CEDT entries in Assembly 125. Initially the Assembly 125 CEDT assemblies (46…53) are identified as CEDT (0xC0 Cyclic EDT Get or 0x40 Cyclic EDT Set) this causes the adapter to add them to the CEDT scan. If the module receives a configuration with CMD3 Disable CHx bits set to "1" (disable), the module changes the appropriate channel's Assembly 125 entry from 0xC0 Cyclic EDT Get to 0x80 EDT Get or 0x40 Cyclic EDT Set to 0x00 EDT Set.

Whenever the adapter receives a ForwardOpen to an EDT module, the adapter automatically rereads the module Assembly 125 to gain a new view of the assemblies. This reread is to check for any changes of CEDT Assemby status to EDT status. If a CMD3 Disable Chx is received on any particular channel, now

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the previous CEDT assembly is marked as an EDT assembly and the adapter does not add that assembly to the CEDT scan. This ForwardOpen reread happens any time a module receives a ForwardOpen, including a Null-ForwardOpen received during system runtime.

Range: 0=Enabled, 1=Disabled Default: 0

Primary Input Data (RTD Output Data) for the 1794-OF8IH

Primary Input Data (RTD Output Data) for 1794-OF8IH

Configuration 69

Word/ SISOC

0/MSW Read RealT Bus Fail Bits # # Words to Read Module ID/Type

1/EDT Read RealT PU/

2/S0 Read RealT F7 F6 F5 F4 F3 F2 F1 F0 Diagnostic status

3/S1 Read RealT Reserved

4/S2 Read RealT C7 C6 C5 C4‘ C3 C2 C1 C0 Reserved

5/S3 Read RealT X7X6 X5X4X3 X2 X1X0Reserved

6/EDT Write RealT Prog/

7/O0 Read RealT Reser

8/O1 Write RealT Output Data Channel 0

9/O2 Read RealT Output Data Channel 1

10/O3 Read RealT Output Data Channel 2

11/O4 Read RealT Output Data Channel 3

12/O5 Read RealT Output Data Channel 4

13/O6 Read RealT Output Data Channel 5

14/O7 Read RealT Output Data Channel 6

15/EDT Read RealT Output Data Channel 7

Where: Fn : Channel n Fault alarm

Read/ Write

Cn : Channel n HART Current Fault Xn : HART Transmitter List Dn : Channel n Digital out

Data Transport

Bit

151413121110 9876543210

Cfg

Run

ved

Event

Reserved Read Write SeqCount EDT Data Byte from Module

Pdg

Fault Reserved Read Write SeqCount EDT Data Byte from Module

Global

Reserved D7 D6 D5 D4 D3 D2 D1 D0

reset

Fault Alarm (S0 Read Word – bits 8…15)

Alarm signal for open-wire channel fault, detected @ <2 mA (<500 μA in digital mode) and short circuit (R<42 in the 4…20 mA range, <86 in digital mode, channel off).

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70 Configuration

This alarm is disabled when a data format is selected which includes 0 mA. Range: 0=Normal, 1=Wire off/short circuit fault detected Default: 0

Diagnostic Data (S0 Read Word – bits 0…7)

Response from module as to its condition.

Diagnostic Data

Diagnostic Status Value: 0 Channel Failure

0x00 All No Errors (default)

0x10 Channel 0 HART Iloop Threshold Configuration Error

0x11 Channel 1 HART Iloop Threshold Configuration Error

0x12 Channel 2 HART Iloop Threshold Configuration Error

0x13 Channel 3 HART Iloop Threshold Configuration Error

0x14 Channel 4 HART Iloop Threshold Configuration Error

0x15 Channel 5 HART Iloop Threshold Configuration Error

0x16 Channel 6 HART Iloop Threshold Configuration Error

0x17 Channel 7 HART Iloop Threshold Configuration Error

0x40 Channel 0 Format Configuration Error

0x41 Channel 1 Format Configuration Error

0x42 Channel 2 Format Configuration Error

0x43 Channel 3 Format Configuration Error

0x44 Channel 4 Format Configuration Error

0x45 Channel 5 Format Configuration Error

0x46 Channel 6 Format Configuration Error

0x47 Channel 7 Format Configuration Error

0x50 Channel 0 Data out of range

0x51 Channel 1 Data out of range

0x52 Channel 2 Data out of range

0x53 Channel 3 Data out of range

0x54 Channel 4 Data out of range

0x55 Channel 5 Data out of range

0x56 Channel 6 Data out of range

0x57 Channel 7 Data out of range

0x80 Module Hardware Failure

0x90 Channel 0 Calibration Error

0x91 Channel 1 Calibration Error

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Diagnostic Data

Diagnostic Status Value: 0 Channel Failure

0x92 Channel 2 Calibration Error

0x93 Channel 3 Calibration Error

0x94 Channel 4 Calibration Error

0x95 Channel 5 Calibration Error

0x96 Channel 6 Calibration Error

0x97 Channel 7 Calibration Error

0xA0 Channel 0 Internal Bus Com Error

0xA1 Channel 1 Internal Bus Com Error

0xA2 Channel 2 Internal Bus Com Error

0xA3 Channel 3 Internal Bus Com Error

0xA4 Channel 4 Internal Bus Com Error

0xA5 Channel 5 Internal Bus Com Error

0xA6 Channel 6 Internal Bus Com Error

0xA7 Channel 7 Internal Bus Com Error

Configuration 71

HART Status Fields

The 1794-OF8IH module supports two connections for pass-through messages. Pass-through messages provide the ability to send HART messages to the HART device by passing through the I/O Module. In addition, HART device information automatically gathered by the I/O module may be accessed through this interface.

The 1794-OF8IH module provides eight queues for each of the two connections. This allows each connection to have up to eight messages pending at any given time, one for each channel. HART pass-through message implements a timeout which is fixed at 20 seconds.

The first connection is provided for a ladder logic user. The following status bits are provided to simplify ladder logic. The second connection does not have status bits provided in the RTD. It can obtain this status by implementing polling messages using the pass-through message interface.

HART Current Fault (S2 Read Word – bits 8…15)

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72 Configuration

dynamically via the HART interface. Active when limit is exceeded. See HART

Current Ratio (Configuration Words 4…7 – bits 3…7, 11…15.) on page 62.

Range: 0=Normal, 1=Fault detected

HART Transmitter List (S3 Read Word – bits 8…15)

Indicates a HART transmitter has been detected on this channel, during the last rebuild.

Range: 0=A HART Transmitter was not detected, 1=A HART Transmitter was detected.

Primary Output Data (RTD Output Data) for 1794-OF8IH

Analog Output Data

Specifies the value of the analog output data to the module. Specific format is controlled by Module Data Format Control parameter. This data is used when the channel is in analog output mode.

Range: See Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…10,

12…15) on page 63.

Digital Output Data (O0 Read Word – bits 0…7)

Specifies the value of the digital output data to the module. This data is used when the channel is in digital output mode.

Range: If the Fault Mode is 0=Disable: 0=Output 0 mA = OFF, 1=22 mA = ON.

If the Fault Mode is 1=Wire off fault detection enabled: 0=Output 500 μA=OFF, 1=22 mA=ON.

See Analog/Digital Output Mode (Configuration Word 8 – bits 0…7)

page 66.

Global Reset (O0 Read Word – bit 14)

This bit resets all latched fault alarms. It acts in conjunction with the Latch Retry parameter. If any channel faults occur, the Latch Retry parameter can be set to

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Configuration 73

cause the fault to be latched and the output to go to its fault state value if the Local Fault mode bit is set.

This is an edge triggered signal. It must first be set to the “1” state, reset will then occur on the “1” to “0” transition.

Range: 0=Normal, 1=Reset.

Fault (EDT Write Word – bit 14) and Run/Prog (EDT Write Word – bit 13)

Fault bit = signal from the adapter to the module that communications has been interrupted with the network. Prog/Run bit = signal from the adapter to the module of the processor mode. These two bits are generally used together.

When the adapter and I/O are first powered-up, the Fault bit is set to ‘0’, by the adapter. On powerup, any module outputs remain OFF (0 mA out) or reset.

Secondary Input Data (Cyclic EDT Input Data) for

When the Fault bit is a ‘1’, the outputs follow the data specified in output data words if the Prog/Run bit indicates the processor is in the Run mode ‘1’. When the Fault bit is a ‘0’ or Prog/Run bit indicates the processor is in the Program mode ‘0’, the outputs follow the data specified in fault state configuration data words. The following is a truth table to explain this in more detail.

Prog/Run Fault Description

1 1 Module's outputs follow the output data table

all other states Module's outputs follow Fault State Values

Range: 0=Local control of outputs, 1=Adapter controls outputs Default: 0 Data Table Reference: Fault, EDT write word, bit 14

Run/Prog Range: 0=Processor in PROGRAM mode, 1=Processor in RUN mode Default: 0

The description of this data table section is identical for HART input or output modules.

1794-OF8IH

Bit parameter descriptions are provided in the last row of the following table

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74 Configuration

Secondary Input Data (Cyclic EDT Input Data) for 1794-OF8IH

Word Bit

1514131211109876543210

0 Reserved CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0

(HART CMD 3 Communications Status)

1 Reserved

2 CH0 HART Field Device Status CH0 HART Comm Status

3 FVA TVA SVA PVA CH0 HART Loop Status

4 CH0 HART Primary Value (IEEE 754-1985 Single-Precision 32 bit floating point)

6 CH0 HART Secondary Value (IEEE 754-1985 Single-Precision 32 bit floating point)

8 CH0 HART Tertiary Value (IEEE 754-1985 Single-Precision 32 bit floating point

10 CH0 HART Fourth (Quaternary) Value (IEEE 754-1985 Single-Precision 32 bit floating point)

12 CH0 SV Units Code CH0 PV Units Code

13 CH0 FV Units Code CH0 TV Units Code

14…25 Words 2…13 for channel 1

26…37 Words 2…13 for channel 2

38…49 Words 2…13 for channel 3

50…61 Words 2…13 for channel 4

62…73 Words 2…13 for channel 5

74…85 Words 2…13 for channel 6

86…97 Words 2…13 for channel 7

Where: CHn: HART CMD 3 Communication Status

0: HART CMD 3 Communication Disabled or No Error; 1: HART CMD 3 Communication Error between Adapter and Module

CHn: HART Comm Status (HART CMD3 Response first status byte) See HART Command 3 Communication Status (Input Word 0 – bits 0…7)

CHn: HART Field Device Status (HART CMD3 Response second status byte) See HART Field Device Status (Secondary Input Word 2 – bits 8…15)

HART Loop Status Bit 0: HART enable

Bit 1: Device Connected 0: Not Connected 1: Connected

Bit 2: Response Error 0: No HART message failure 1: Response ended in error

Bit 3: CMD 48 Update 0: CMD 48 not updated 1: CMD 48 updated

Bit 4: HART Loop Tolerance Error 0: No HART Current Fault 1:HART Current Fault

Bit 5: HART Update 0: HART Device information not updated 1: HART Device information updated since last read

Bit 6: HART message 0: No new message 1: HART user message queue has completed a message

Bit 7 Reserved

PVA – The primary variable for this channel has been acquired. SVA – The secondary variable for this channel has been acquired. TVA – The tertiary variable for this channel has been acquired. FVA – The fourth (quaternary) variable for this channel has been acquired.

0: Disabled 1: Enabled

on page 75.

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Configuration 75

IMPORTANT

Secondary Data Table Section Created by the Adapter

The description of this data table section is identical for HART input or output modules. See HART Command 3 Communication Status (Secondary Input

Word 0, bits 0…7) on page 52 for more information.

HART Command 3 Communication Status (Input Word 0 – bits 0…7)

The description of this data table section is identical for HART input or output modules. See HART Command 3 Communication Status (Secondary Input

Word 0, bits 0…7) on page 52 for more information.

Secondary Data Table Section from Module CEDT Attribute

The description of this data table section is identical for HART input or output modules.

HART Field Device Status (Secondary Input Word 2 – bits 8…15)

This byte is part of the CMD 3 data response of the HART FD. It is the second status byte of the HART response and the FD status, example: “primary variable out of limits” or “analog output saturated”.

CMD 3 Second Status byte response codes

HART Field Device Status

Bit 0 Primary variable out of limits

Bit 1 Non-primary variable out of limits

Bit 2 Analog output saturated

Bit 3 Analog output current fixed

Bit 4 More status available

Bit 5 Cold start

Bit 6 Configuration changed

Bit 7 Field device malfunction

When a communication error is reported in the CMD 3 first status byte, bits 0...7 will have the value of 0.

Data Table Reference: HART Field Device Status, Secondary Input Word 2, bits 8…15.

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76 Configuration

IMPORTANT

Interpret the Status

The module status indicators conform to the FLEX I/O standard. The module will have a single Red and Green indicators for global module status/power

Indicators

indication.

The module supports six states, common to all Phase 1 EDT compliant modules, as described below. A single bi-color indicator displays the module status as given below.

Module Status Indicators

Module State

New Power up initialization is complete and self-test has

No Config Module has not received configuration from Master.

Idle Controller in Program mode.

Active Controller in Run mode and communication is normal. 1 1 1 Green, solid

Fault FLEX I/O Communications Fault or PU bit is one

Fatal fault Module fails self test or detects illegal state

Off External power has not been applied. Off

Condition PU Bit Prog/Run bit Fault bit LED Color and

State

been passed. Loads stored configuration, if it exists. Read Module Information Block.

It can Set and Get attributes.

Communication is normal.

and Fault=0

transition.

(1)

(2)

0 * * Green, blink @ 1 Hz

1 0 1 Green, blink @ 1 Hz

* * 0 Green, blink@ 1 Hz

* * * Red, solid

* * Red, blink @ 1 Hz

(1) The status bits in the table correspond to module status bits available in the module status word.

(2) Bit state flagged as '*' depends on the state transition, per FLEX I/O Systems Specifications.

Edit Your 1794-IF8IHNFXT Configuration with Logix Designer (Full

Logix Designer (or RSLogix 5000) programming software automatically creates module-defined data types and tags when a module is created. This section describes how to modify the default configuration for your 1794-IF8IHNFXT module.

Profile)

Configuring the 1794-IF8IH and 1794-OF8IH modules require programming with RSLogix 5000 version 17. Configuration for the 1794-IF8IHNFXT module is done through the Module Definition interface using Logix Designer version 24 and later, as described in the next sections. See Use the 1794-IF8IHNFXT with the Generic and Thin Profiles

on page 135 if you are using RSLogix 5000 version 23 or earlier.

Data types symbolically name module configuration, input and output data. Tags let you provide each a unique name, such as where the user-defined data type and slot reside on the controller. This information is used to communicate data between the controller and module.

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Configuration 77

IMPORTANT

TIP

After you have set configuration for a module, you can review and change your choices. You can change configuration data and download it to the controller while online. This is called dynamic reconfiguration.

Your freedom to change some configurable features, though, depends on whether the controller is in Remote Run Mode or Program Mode.

Although you can change configuration while online, you must go offline to add or delete modules from the project.

The editing process begins on the main page of RSLogix 5000 or Logix Designer software.

1. On the I/O Configuration tree for your project in RSLogix 5000, add your 1794-IF8IHNFXT module. On the New Module dialog that appears when you add your module to the I/O Configuration tree, specify the following properties of the module.

2. Click Open Module Properties. The Module Properties dialog appears and has the following tabs available for configuration.

3. Click any of the tabs to edit the parameters for your module. The next sections show you how to edit the different tabs in the Module Properties dialog.

Tabs can be selected in any order. The following examples are for instructional purposes.

General Tab

The General tab allows you to edit general properties such as Name, Description, and Slot for your module, which you can specify in the New Module dialog, as shown previously.

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78 Configuration

You also can edit Module Definition properties such as revision and electronic keying.

General Tab Field Descriptions

Field Name Description

Revision Specifies the module major and minor revision.

Electronic Keying The electronic keying feature automatically compares the expected

module, as shown in the RSLogix 5000 I/O Configuration tree, to the physical module before I/O communication begins. You can use electronic keying to help prevent communication to a module that does not match the type and revision expected.

For each module in the I/O Configuration tree, the user-selected keying option determines if, and how, an electronic keying check is performed.

Typically, three keying options are available:

• Exact Match

• Compatible Module (default)

• Disable Keying

Exact Match is an electronic keying protection mode that requires the

physical module and the module configured in the software to match according to vendor, catalog number, major revision and minor revision.

Compatible Module indicates that the module determines whether to accept or reject communication. Compatible Keying is the default setting. It allows the physical module to accept the key of the module configured in the software, provided that the configured module is one the physical module is capable of emulating. The exact level of emulation required is product and revision specific.

Disable Keying indicates the keying attributes are not considered when attempting to communicate with a module. Other attributes, such as data size and format, are considered and must be acceptable before I/O communication is established. With Disabled Keying, I/O communication may occur with a module other than the type specified in the I/O configuration tree with unpredictable results. We generally do not recommend using Disabled Keying.

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General Tab Field Descriptions

Field Name Description

Comm Format The following Comm Format options are available:

• Input Data – specifies an independent connection where a device

receives inputs from the target device and send configuration data to the target device. An Input Only connection does not send outputs; it only receives inputs. You can specify multiple Input Only connections to the target device from different originators.

• Listen-Only and Input Data – The Listen Only mode option lets the

controller and module establish communication without the controller sending any configuration data.

• Input Data and HART PV

• Listen-Only, Input Data and HART PV

Connection Tab

The Connection tab on the Module Properties dialog box lets you enter a requested packet interval (RPI), inhibit a module, and set a connection fault when the controller is in Run mode. The RPI provides a defined, maximum period of time when data is transferred to the owner-controller.

1. Choose from the options on the Connection tab.

Connection Tab Field Descriptions

Field Description

Requested Packet Interval (RPI) (ms)

Inhibit Module Check the box to prevent communication between the owner-

Major Fault On Controller If Connection Fails While in Run Mode

Use Unicast Connection over EtherNet/IP

Module Fault The fault box is empty if you are offline. The type of connection fault

A user-defined rate at which the module updates the information sent to its owner-controller.

This interval defines the slowest rate at which a module sends its data to the owner-controller. The time ranges from 2.0…750 ms and is sent to the module with all other configuration parameters.

controller and the module. This option allows for maintenance of the module without faults being reported to the controller.

Check the box to create a major fault if there is a connection failure with the controller while in Run mode.

This option is enabled by default. Unicast connections are point to point transmissions between a

source node and destination node on the network. A Frame is sent to a single destination.

appears in the text box if a fault occurs when the module is online.

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2. Do one of the following:

• Click Apply to store a change but stay on the dialog box to choose another tab.

• Click OK if you are finished making changes.

Configuration Tab

The Configuration tab on the Module Properties dialog box lets you program information on each of the eight channels on the 1794-IF8IHNFXT module.

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1. Choose from the options on the Configuration tab.

Configuration tab

Field Description

Channel Indicates the eight input channels 0…7.

Current range Current range with the following value options:

• 0..20 mA Milliamps (Default)

• 0..20 mA % Full Scale

• 0..20 mA BINARY

• 4..20 mA Milliamps

• 4..20 mA % Full Scale

• 4..20 mA Signed 2's Complement

• 4..20 mA Binary

Digital filter Serves to reject higher frequency noise and harmonics.

Choose a value in Hz that specifies the time constant for a digital first order lowpass filter on the input. A value of 0 disables the filter.

• 242 Hz (Default)

• 123 Hz

• 62 Hz

• 19.6 Hz

• 16.7 Hz

• 10 Hz

• 4.17 Hz

Enable HART Allows to enable or disable HART feature. Check the box to

Enable HART Current Ratio Allows for enabling or disabling ratio limit per channel.

HART Current Ratio Limit Sets the ratio limit. For more information about this parameter,

enable HART. Default: Unchecked.

The Enable HART check box (DHn bit in the configuration data table) along with the HART OFF Dynamic control bit determines if HART communication is enabled on a channel.

The Enable HART check box has priority and will disable all HART communication on a channel at all times even when the HART OFF Dynamic control bit is False(0). If Enable HART check box is checked, then the HART OFF output control bit can be used to dynamically turn HART Off and back On again at any time.

See HART On/Off at Dynamic Runtime

Default: Unchecked.

see HART Current Ratio (Configuration Words 4…7 – bits 3…7,

11…15.) on page 62.

on page 82.

2. Do one of the following:

• Click Apply to store a change but stay on the dialog box to choose another tab.

• Click OK if you are finished making changes.

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HART On/Off at Dynamic Runtime

To en ab l e H A RT at ru nt im e:

1. Ensure that the Enable HART check box in Configuration tab is checked.

2. Change the HART OFF Dynamic Control bit (ChxxHARTCommOff )

to 1 to turn off HART dynamically.

3. Change the HART OFF Dynamic Control bit (ChxxHARTCommOff ) to 0 to turn on HART dynamically again.

Edit the output controller tag ChxxHARTCommOff using a configuration software such as RSLogix 5000 version 24. To enable HART on each channel, set the tag’s value to 0. To disable HART, set the value to 1 as shown below.

The HART OFF dynamic control output bit, along with the HART Disable configuration bit, determines if HART communication is enabled on a Channel. The HART Disable (DHn) configuration bit has priority and disables all HART communication on a channel at all times even when the HART OFF output bit is False(0). If the HART Disable configuration bit is False(0), then the HART OFF output control bit can be used to turn HART off and on dynamically at any time.

Alarm Tab

The Alarm tab on the Module Properties dialog box lets you program high and low limits, and disable and latch alarms per channel.

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Click Channel button to set limits and alarm configuration for each of the 4 channels.

Use the sliders to set limits. HH slider sets High High limits; HI sets High limits; LL for Low Low; and LO for Low.

1. Choose from the options on the Alarm tab.

Alarm Configuration Tab Field Descriptions

Field What to do Description

Channel Select a push button

to correspond to a channel (0…7)

Process Alarms Type a value for each of the four alarm trigger

High High Choose from

-32,768...32,767

High Choose from

-32,768...32,767

Low Choose from

-32,768...32,767

Low Low Choose from

-32,768...32,767

Enable Alarms Click the checkbox

to enable alarms.

Click the channel that is being configured.

points that alert you when the module has exceeded these limitations.

You also can use the respective slider icon to set a trigger value.

Select a value so that any value out of range in this field causes a profile validation error. This value also appears in the HH slider on this dialog.

Select a value so that any value out of range in this field causes a profile validation error. This value also appears in the HI slider on this dialog.

Select a value so that any value out of range in this field causes a profile validation error. This value also appears in the LO slider on this dialog.

Select a value so that any value out of range in this field causes a profile validation error. This value also appears in the LL slider on this dialog.

Check the box to enable all alarms and show the slider control.

Important: When you disable all alarms, you disable process, and channel diagnostic alarms (for example, underrange and overrange). We recommend that you disable only unused channels so extraneous alarm bits are not set.

Default: Unchecked.

2. After the channels are configured, do one of the following:

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• Click Apply to store a change but stay on the dialog box to choose

another tab.

• Click OK to apply the change and close the dialog box.

• Click Cancel to close the dialog box without applying changes.

Alarm Conditions

When configuring alarms, error messages are displayed if the following conditions are not met.

1. High high alarm must be greater than High Alarm. If the condition is not met, the following error is displayed:

2. High Alarm value must be greater than Low Alarm. If not met, the following error message is displayed:

3. Low Alarm must be greater than Low Low Alarm. If not met, the following error message is displayed.

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IMPORTANT

Possible Categories for PV Range Units

Field Possible Categories

Category Electrical

Energy

Length

Mass

Mass Flow

Mass per volume

Miscellaneous

Power

Pressure

Radial velocity

Temperature

Tim e

Velo city

Viscosity

Volu me

Volumetric flow

HART Command Tab

The HART Command tab can only be edited when in RUN mode.

Configure the HART Command tab based on the following field descriptions.

HART Command Tab Field Descriptions

Field What to do Description

Channel Select a push button

Click the channel that is being configured. to correspond to a channel (0…7)

Disable Data Publishing (Command 3)

Check to disable. This option removes the channel being configured

from the cyclic update lists such that the channel’s

HART data is no longer being published to the user.

Default: Unchecked.

Enable HART Device PV Damping Configuration (Command 34)

Check to enable. This option enables the module to automatically

configure the HART device by sending the HART

Command 34 during the initialization sequence that

occurs when either a device is first detected on the

channel or the module detects that the device’s

“Config Changed” bit is set.

Default: Unchecked.

PV Damping Specify 32-bit

floating point value.

This field is enabled if “Enable HART Device PV

Damping Configuration (Command 34)” checkbox is

checked. Values allowed are 32-bit floating point

value.

It sets the PV Damping value for the channel.

For more information about PV Damping, see

Enable HART PV Damping Value (Configuration

Word 105, bits 0…7) on page 45.

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HART Command Tab Field Descriptions

Field What to do Description

Enable HART Device PV Range Configuration (Command 35)

PV Range Units Specify value. The field is available when “Enable HART Device

Select PV Range Units (...)

PV Upper Range Specify 32-bit

PV Lower Range Specify 32-bit

Check to enable. This option enables the module to automatically

Click button to bring up dialog box.

floating point value.

configure the HART device by sending the HART Command 35 during the initialization sequence that occurs when either a device is first detected on the channel or the module detects that the device’s “Config Changed” bit is set. This feature requires the user to enter the upper, lower, and range units code values into the module’s configuration data.

Default: Unchecked.

PV Range Configuration (Command 35)” is checked.

This button brings up dialog box to specify PV Range units.

The field is available when “Enable HART Device PV Range Configuration (Command 35)” is checked.

This field specifies the PV Upper Range value for the channel being configured.

The field is available when “Enable HART Device PV Range Configuration (Command 35)” is checked.

This field specifies the PV Lower Range value for the channel being configured.

Auto-configure HART Device with user-supplied PV Damping and Range Values

The Enable HART Device PV Damping and Enable HART Device PV Range configuration allows for automatic configuration of a HART device with user supplied PV Damping and/or PV Range values by sending HART commands 34, 35, and 44 to the device at device connection time or if the module detects that the configuration bits are set. See Enable HART PV Upper and Lower

Range (Configuration Word 105, bits 8...15) on page 44 and Enable HART PV Damping Value (Configuration Word 105, bits 0…7) on page 45.

The HART commands will only be sent to the device if the feature is enabled and the module detects that the value in the device is different from what is in the configuration table. If the PV Range enable bit is set and the module detects that the PV Units Code value of the device does not match the value in the configuration table, the module will also send command 44 to the HART device. The PV Damping, PV units code, and the PV Upper and Lower Range floating point values will reside in the configuration table.

If the write operation fails (device write protected, unsupported values, etc), then a status flag will be set in bit 7 of the “HART Loop Status” byte to notify the user that the device is not configured properly. If the write is successful and no errors are returned from the device, the module will also verify the floating point values (PV Range and Damping) read back from the device are within 0.5% of the configuration table values, otherwise an error will be flagged.

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Calibration Tab

The Calibration tab on the Module Properties dialog box lets you recalibrate the module, if necessary. Calibration corrects any hardware inaccuracies on a particular channel.

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IMPORTANT

HART Device Info Tab

The HART Device Info tab is used for diagnostics. It is only available when the Enable HART is checked in the Configuration tab. It allows the user to monitor and check diagnostic data for the module.

Chapter Summary

The HART Device Info tab in Logix Designer can only be edited when in RUN mode.

In this chapter, you learned how to configure your HART module and how to use the RSLogix 5000/Logix Designer software to install and configure your module. The next chapter describes how to configure your module to automatically collect data from the HART field device and place it in the module’s input tag.

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Allen-Bradley 1794-OA8K Owners Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important User Information

Preface

Why Read This Manual

Who Should Use This Manual

About the Vocabulary

Related Documentation

Summary of Changes

New and Updated Information

Overview

What FLEX I/O Analog Modules Do 1

Communicate with Programmable Controllers

Events Following Powerup

Physical Features of Your Module

Indicators

Use Alarms on the Input Modules

Low Alarm

High Alarm

Remote Fault Alarm

Local Fault Alarm

Use the HART Capabilities

HART Implementation Overview

Chapter Summary

Overview

Select Your Analog Input Module Operating Features

Fault Enable

Sample Filter Frequency Rates

Data Formats

Select Your Analog Output Module Operating Features

Local Fault Mode

Latch Mode

Global Reset

Data Format

Fault Alarm

Chapter Summary

Overview

Before You Install Your Analog Module

Removal and Insertion Under Power

Install the Module

Mount on a DIN Rail

Mount on a Panel or Wall

Mount the Analog Modules on the Terminal Base Unit

Wire the Terminal Base Units

Connect Wiring to the FLEX I/O HART Analog Modules

Ground the Module

Chapter Summary

Overview

Data Transfer Types

Configuration Parameters for 1794-IF8IH

Configuration Parameter Descriptions for 1794-IF8IH and 1794-IF8IHNFXT

Byte Order (Configuration Word 0 – bits 0…1, 8…9)

Fault Mode (Configuration Word 0, bits 2…5, 10…13)

Digital Filter (Configuration Words 4…7 – bits 0…2, 8…10)

Data Format (Configuration Words 2, 3 – bits 0…3, 4…7, 8…11, 12…15)

Remote Low Low Alarm Limit

Remote High High Alarm Limit

Low Alarm Limit

High Alarm Limit

HART Disable Channel 0…7 (Configuration Word 1 – bits 8…15)

HART Current Fault Limit (Configuration Words 4…7 – bits 3…7, 11…15)

HART Data Publishing Disable

Enable HART PV Upper and Lower Range (Configuration Word 105, bits 8...15)

Enable HART PV Damping Value (Configuration Word 105, bits 0…7)

Primary Input Data (RTD Input Data) for 1794-IF8IH and 1794-IF8IHNFXT

Primary Input Data (Input Words 0…7 – bits 0…15)

Module Diagnostic Status (Input Word 10 – bits 0…7)

HART Failure (Input Word 11 – bits 0…7)

HART Current Ratio (Input Word 11 – bits 8…15)

HART Transmitter List (Input Word 10 – bits 8…15)

HART Command 3 Communication Status (Secondary Input Word 0, bits 0…7)

HART Field Device Command and Communication Status (Secondary Input Word 2, bits 0…7)

HART Field Device Status (Secondary Input Word 2 – bits 8…15)

HART Loop Status (Secondary Input Word 3 – bits 0…7)

HART PV Status (Secondary Input Word b, bits 8…15)

HART Primary Variable (Secondary Input Words 4, 5 – bits 0…15)

HART Secondary Variable (Secondary Input Words 6, 7 – bit 0…15)

HART Third Variable (Secondary Input Words 8, 9 – bits 0…15)