Rockwell Automation 1756-OF8H User Manual

Download

User Manual

ControlLogix HART Analog I/O Modules

Catalog Numbers

1756-IF8H, 1756-IF16H, 1756-OF8H

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, ControlLogix, RSLogix 5000, L ogix5000, RSLinx, FactoryTalk AssetCentre, and TechConnect are trademarks of Rockwell Automation, Inc.

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

Summary of Changes

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

New and Updated Information

This table contains the changes made to this revision.

Topic Page

Additional Input Data tag, Analog and HART by Channel, is available for the 1756-IF8H and 1756-OF8H analog I/O modules.

Power supply wiring diagrams are available for the 1756-IF8H analog input module.

Unicast connection to streamline EtherNet/IP network broadcast traffic is available for the 1756-IF8H and 1756-OF8H analog I/O modules.

Additional device diagnostics are available on the HART Device Info tab.

Tag definitions are updated for the 1756-IF8H and 1756-OF8H analog I/O modules.

Manufacturer identification codes are updated. 205

54, 80

51, 93

111

163

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 3

Summary of Changes

4 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Preface

ControlLogix HART Analog I/O Modules

Module Installation

Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Chapter 1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Module Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

HART Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Integrated HART Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

HART-enabled I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Asset Management Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Electronic Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Exact Match . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Compatible Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Disabled Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Timestamping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Module Scaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Chapter 2

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Environment and Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Preventing Electrostatic Discharge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

European Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

North American Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . 27

Removal and Insertion Under Power (RIUP). . . . . . . . . . . . . . . . . . . . . . . 28

Before You Begin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Module Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Install the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Key the Removable Terminal Block/Interface Module . . . . . . . . . . . . . . 31

Wire the Removable Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Ground the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Connect the Grounded End of the Cable. . . . . . . . . . . . . . . . . . . . . . . 32

Connect the Ungrounded End of the Cable . . . . . . . . . . . . . . . . . . . . 33

Wire the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Removal Terminal Block Assembly and Installation. . . . . . . . . . . . . . . . . 34

Assemble the Removable Terminal Block and the Housing . . . . . . 34

Install the Removable Terminal Block. . . . . . . . . . . . . . . . . . . . . . . . . . 35

Remove the Removable Terminal Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Remove the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 5

Table of Contents

Chapter 3

ControlLogix Module Operation

1756-IF8H HART Analog Input Module

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Direct Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Input Module Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Input Modules in a Local Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Real Time Sample (RTS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Requested Packet Interval (RPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Trigger Event Tasks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Input Modules in a Remote Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Remote Input Modules Connected Via ControlNet Network . . . . 44

Remote Input Modules Connected Via EtherNet/IP Network . . . 45

Output Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Output Modules in a Local Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Output Modules in a Remote Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Remote Output Modules Connected Via ControlNet Network . . 47

Remote Output Modules Connected Via EtherNet/IP Network . 48

Listen-only Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Multiple Owners of Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Configuration Changes in an Input Module with Multiple Owners. . . 51

Unicast Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Chapter 4

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Module Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Data Formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Input Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Module Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Real Time Sampling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Underrange and Overrange Detection . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Process Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Rate Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Wire-off Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

1756-IF8H Module Fault and Status Reporting. . . . . . . . . . . . . . . . . . . . . 63

1756-IF8H Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

1756-IF8H Module Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

1756-IF8H Channel Fault Tags. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

1756-IF8H Channel Status Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Specifications and Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

6 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Chapter 5

Table of Contents

1756-IF16H HART Analog Input Module

1756-OF8H HART Analog Output Module

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Module Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Input Ranges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Module Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Real Time Sampling (RTS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Underrange and Overrange Detection. . . . . . . . . . . . . . . . . . . . . . . . . . 70

Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Wire-off Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

1756-IF16H Module Fault and Status Reporting . . . . . . . . . . . . . . . . . . . 75

1756-IF16H Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

1756-IF16H Module Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . 77

1756-IF16H Channel Fault Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

1756-IF16H Channel Status Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Specifications and Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Chapter 6

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Module Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Ramping/Rate Limiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Hold for Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Open Wire Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Clamping and Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Clamp and Limit Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Data Echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Wire the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Use Module Block and Output Circuit Diagrams . . . . . . . . . . . . . . . . . . . 84

1756-OF8H Module Fault and Status Reporting . . . . . . . . . . . . . . . . . . . 85

1756-OF8H Fault Reporting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Module Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Channel Fault Word Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Channel Status Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Specifications and Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 7

Table of Contents

Chapter 7 Configure the Modules with RSLogix 5000 Software

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Create a New Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

General Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

HART Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Connection Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Module Info Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Coordinated System Time (CST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Refresh or Reset Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Applying Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Configuration Tab - Input Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Configure the Individual Channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Scaling to Engineering Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Configure All Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Module Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Alarm Tab - 1756-IF8H Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Configuration Tab - Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Configure Individual Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Configure All Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Output State Tab - Output Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Ramp Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Output State in Program Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Output State in Fault Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Communication Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Limits Tab - Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

HART Device Info Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Data in the Input Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

HART Dynamic Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

How the Module Automatically Collects Data . . . . . . . . . . . . . . . . . 117

Chapter 8

Getting HART Data By Using CIP MSG

8 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Using MSG Instructions to Access the HART Object . . . . . . . . . . . . . . 122

CIP Services to Access Common HART Data . . . . . . . . . . . . . . . . . . . . . 123

Read Dynamic Variables (Service Code = 16#4B) . . . . . . . . . . . . . . 123

Read Additional Status (Service Code = 16#4C) . . . . . . . . . . . . . . . 125

Get Device Information (Service Code = 16#4D) . . . . . . . . . . . . . . 126

Getting HART Device Information By Using CIP Generic MSG . . . 128 CIP Services to Pass-through a HART Message to the

HART Field Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

HART Module Scanning Diagram with Pass-through Messages . . . . . 133

HART Pass-through CIP Message Layout Details. . . . . . . . . . . . . . . . . . 134

Pass-through Init (Service Code= 16#4E). . . . . . . . . . . . . . . . . . . . . . 134

Pass-through Query (Service Code= 16#4F) . . . . . . . . . . . . . . . . . . . 134

Table of Contents

Flush Queue (Service Code= 16#50). . . . . . . . . . . . . . . . . . . . . . . . . . 136

HART Pass-through Message Ladder Logic Example. . . . . . . . . . . . . . . 136

Chapter 9 HART Modules Used with Asset Management Software

Unlatch Alarms and Reconfigure Modules By Using Ladder Logic

Module Troubleshooting

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Considerations for Asset Management Systems . . . . . . . . . . . . . . . . . . . . 141

Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Chapter 10

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Using Message Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Processing Real-time Control and Module Services. . . . . . . . . . . . . 146

One Service Performed Per Instruction. . . . . . . . . . . . . . . . . . . . . . . . 146

Creating a New Tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Enter Message Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Unlatch Alarms in the 1756-IF8H Module. . . . . . . . . . . . . . . . . . . . . . . . 150

Unlatch Alarms in the 1756-OF8H Module. . . . . . . . . . . . . . . . . . . . . . . 152

Reconfigure a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Chapter 11

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Use Module Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

General Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Use RSLogix 5000 Software to Troubleshoot a Module . . . . . . . . . . . . 159

Module Configuration Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Additional Fault Codes - Module Level. . . . . . . . . . . . . . . . . . . . . . . . 160

Additional Fault Codes - Channel Level. . . . . . . . . . . . . . . . . . . . . . . 161

Tag Definitions

Appendix A

Communication Mode Member Names and Definitions . . . . . . . . . . . 163

Module-defined Data Types, 1756-IF8H Module. . . . . . . . . . . . . . . . . . 164

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Analog Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Analog and HART PV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Analog and HART by Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Module-defined Data Types, 1756-IF16H Module . . . . . . . . . . . . . . . . 173

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Analog Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Analog and HART PV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

Analog and HART by Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Module-defined Data Types, 1756-OF8H Module. . . . . . . . . . . . . . . . . 181

Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Analog Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182

Analog and HART PV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 9

Table of Contents

Analog and HART by Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Appendix B

Use 1492 Wiring Systems

Wiring System Uses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

with Your Analog I/O Module

Appendix C Additional HART Protocol Information

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

Message Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Response Code and Field Device Status . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

HART PV, SV, TV, and FV Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202

Appendix D Manufacturer ID Codes

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Appendix E Engineering Unit Code Numbers

Code Number Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Glossary

Master-slave Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Multiple Master Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Transaction Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

Burst Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Index

10 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Preface

This manual describes how to install, configure, and troubleshoot ControlLogix highway addressable remote transducer (HART) analog I/O modules.

Audience

Additional Resources

You must be able to program and operate a Rockwell Automation ControlLogix controller to efficiently use your analog I/O modules. In this manual, we assume that you know how to do this. If you do not, before attempting to use this module, refer to the Logix5000 controller documentation, as listed in the related table.

These documents contain additional information concerning related Rockwell Automation products.

Resource Description

ControlLogix HART Analog I/O Modules Release Notes, publication 1756-RN636

Logix5000 Controllers Common Procedures Programming Manual, publication 1756-PM001

ControlLogix System User Manual, publication 1756-UM001

1756 ControlLogix I/O Modules Specifications Technical Data, publication 1756-TD002

Industrial Automation Wiring and Grounding Guidelines, publication1770-4.1

Product Certifications website,

http://www.ab.com

Contains release information about the ControlLogix analog modules with HART protocol.

Provides access to a collection of programming manuals that describe procedures that are common to all Logix5000 controller projects.

Provides configuration and operational procedures for ControlLogix controllers.

Publication provides specifications for the 1756-IF8H and 1756-OF8H analog I/O modules.

Provides general guidelines for installing a Rockwell Automation industrial system.

Provides declarations of conformity, certificates, and other certification details.

You can view or download publications at http://www.rockwellautomation.com/

literature/. To order paper copies of technical documentation, contact your local

Rockwell Automation distributor or sales representative.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 11

Preface

Notes:

12 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Chapter

ControlLogix HART Analog I/O Modules

Introduction

ControlLogix HART analog I/O modules connect a Logix controller to your process. 1756-IF8H and 1756-IF16H input modules receive the signals from process value transmitters and convert them to temperature, flow, pressure, pH, and other measurements for use in the Logix controller. By using 1756-OF8H HART output modules, the controller adjusts the setting of valves and other devices to keep your process running as desired.

Using instruments that support the HART protocol allows measuring several process parameters with a single field device, provides enhanced status and diagnostics, and allows remote configuration and troubleshooting.

The table explains the topics discussed in this chapter.

Topic Page

Module Components 14 HART Communication 14 Asset Management Software 17 Electronic Keying 17 Timestamping 23 Module Scaling 24

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 13

Chapter 1 ControlLogix HART Analog I/O Modules

Removable Te rm in al Block (RTB)

45118

Module Components

# Physical Feature Description

1 Backplane connector The backplane connector interface for the ControlLogix system connects the module to the ControlBus backplane. 2 Connector pins Input/output, power, and grounding connections are made to the module through these pins with the use of a

removable terminal block (RTB) or interface module (IFM). 3 Locking tab The locking tab anchors the RTB or IFM cable on the module, maintaining wiring connections. 4 Slots for keying Mechanically keys the RTB to prevent inadvertently making the wrong wire connections to the module. 5 Status indicators Indicators display the status of communication, module health, and input and output devices. Use these indicators

to help in troubleshooting. 6 Top and bottom guides Guides provide assistance in seating the RTB or IFM cable onto the module.

This figure shows the physical features of the ControlLogix analog I/O modules.

HART Communication

The HART field communication protocol is widely accepted in industry as a standard for digitally enhanced 4…20 mA communication with smart (microprocessor-based) field devices. A digital signal is superimposed onto the 4…20 mA current loop to provide two means of communication from the device. The 4…20 mA analog channel lets a single process variable be communicated at the fastest possible rate while the digital channel provides access to multiple process variables, data quality, and device status information. The HART protocol lets these simultaneous communication channels be used in a complementary fashion.

The modules support the HART protocol and perform these distinct operations:

• Convert to or from 4…20 mA analog signals and digital numeric values in engineering units used in the Logix controller.

• Collect dynamic process data automatically from the connected HART field device, such as temperature, pressure, flow, or valve position.

• Configure and troubleshoot the HART Field Device by using FactoryTalk AssetCentre service from your control room.

14 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix HART Analog I/O Modules Chapter 1

Analog Signal

The Highway Addressable Remote Transducer (HART) protocol supports two-way digital communication, complements traditional 4…20 mA analog signals, and includes the following features:

· Predefined commands

- Common practice

- General purpose

- Device specific

· Large installed base

· Worldwide support

Analog Signal

+0.5 mA

0.5 mA

1200 Hz "1"

2200 Hz "0"

HART Signal

Time (seconds)

0 1 2

20 mA

Analog Signal

4 mA

See the figure

(1)

that shows information about the HART protocol.

With the ControlLogix HART analog I/O modules, field device data can be accessed by both the controller and device maintenance and management software.

The ControlLogix HART analog I/O modules support Command-response communication protocol and point-to-point wiring architecture.

(1) The figure is from the HART Communication Protocol Specifications, April, 2001, Revision 6.0, HART

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 15

Chapter 1 ControlLogix HART Analog I/O Modules

Primary Master

Secondary Master (handheld communicator as secondary master)

Slave

44219

Commands can be accepted from either of two master devices. The controller is one of the master devices and continuously obtains information from the field device. The second master can typically be device maintenance, for example a handheld communicator, as shown below.

Integrated HART Networks

Most transmitters are available with a HART protocol interface. The type of data available is dependent on the type of instrument.

An example application is a smart mass flowmeter. By using just the standard mA signal from the flowmeter it provides one field measurement - flow. By using the mA signal with HART provides additional process information. The mA signal representing flow is still available. The HART configuration of the flowmeter can be set for primary value (PV)

(SV) being static pressure, third value (TV) being temperature, and fourth value (FV)

being a digital representation of the mA signal.

In addition to these additional process variables, device status is also provided via HART. Instead of one process variable, the controller sees four process variables, has a check on the mA signal, and has a reading of device status. HART connectivity provides all this with no changes to the existing 4…20 mA wiring.

This HART connectivity also provides remote configuration and troubleshooting of field devices by using software, such as FactoryTalk AssetCentre or Endress+Hauser FieldCare software.

being mass flow, secondary value

16 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

HART-enabled I/O Modules

The ControlLogix HART analog I/O modules have HART modems built in, so there is no need to install external HART multiplexors or clip on HART modems.

ControlLogix HART Analog I/O Modules Chapter 1

EtherNet/IP Network

Asset Management Software

44220

Asset Management Software

Electronic Keying

You can use the modules with asset management software. The following figure shows the use of asset management software, such as FactoryTalk AssetCentre software or Endress+Hauser FieldCare software.

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 Keying

• Disable Keying

You must carefully consider the benefits and implications of each keying option when selecting between them. For some specific module types, fewer options are available.

Electronic keying is based on a set of attributes unique to each product revision. When a Logix5000 controller begins communicating with a module, this set of keying attributes is considered.

Table 1 - Keying Attributes

Attribute Description

Vendor The manufacturer of the module, for example, Rockwell Automation/Allen-Bradley. Product Type The general type of the module, for example, communication adapter, AC drive, or digital I/O. Product Code The specific type of module, generally represented by its catalog number, for example, 1756-IB16I. Major Revision A number that represents the functional capabilities and data exchange formats of the module. Typically, although not always, a later,

Minor Revision A number that indicates the module’s specific firmware revision. Minor Revisions typically do not impact data compatibility but may

that is higher, Major Revision supports at least all of the data formats supported by an earlier, that is lower, Major Revision of the same catalog number and, possibly, additional ones.

indicate performance or behavior improvement.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 17

Chapter 1 ControlLogix HART Analog I/O Modules

IMPORTANT

You can find revision information on the General tab of a module’s Properties dialog box.

Figure 1 - General Tab

Changing electronic keying selections online may cause the I/O communication connection to the module to be disrupted and may result in a loss of data.

Exact Match

Exact Match keying requires all keying attributes, that is, Vendor, Product Type, Product Code (catalog number), Major Revision, and Minor Revision, of the physical module and the module created in the software to match precisely to establish communication. If any attribute does not match precisely, I/O communication is not permitted with the module or with modules connected through it, as in the case of a communication module.

Use Exact Match keying when you need the system to verify that the module revisions in use are exactly as specified in the project, such as for use in highlyregulated industries. Exact Match keying is also necessary to enable Automatic Firmware Update for the module via the Firmware Supervisor feature from a Logix5000 controller.

18 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix HART Analog I/O Modules Chapter 1

EXAMPLE

Module Configuration Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IB16D Major Revision = 3

Minor Revision = 1

Communication is prevented.

Physical Module Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IB16D Major Revision = 3

Minor Revision = 2

IMPORTANT

In the following scenario, Exact Match keying prevents I/O communication. The module configuration is for a 1756-IB16D module with module revision 3.1. The physical module is a 1756-IB16D

module with module revision 3.2. In this case, communication is prevented because the Minor Revision of the module does not match precisely.

Changing electronic keying selections online may cause the I/O Communication connection to the module to be disrupted and may result in a loss of data.

Compatible Keying

Compatible keying indicates that the module determines whether to accept or reject communication. Different module families, communication adapters, and module types implement the compatibility check differently based on the family capabilities and on prior knowledge of compatible products.

Compatible keying is the default setting. Compatible keying 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.

With Compatible keying, you can replace a module of a certain Major Revision with one of the same catalog number and the same or later, that is higher, Major Revision. In some cases, the selection makes it possible to use a replacement that is a different catalog number than the original. For example, you can replace a 1756-CNBR module with a 1756-CN2R module.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 19

Chapter 1 ControlLogix HART Analog I/O Modules

EXAMPLE

Module Configuration Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IB16D Major Revision = 3

Minor Revision = 3

Physical Module Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IB16D Major Revision = 3

Minor Revision = 2

Communication is prevented.

In the following scenario, Compatible keying prevents I/O communication: The module configuration is for a 1756-IB16D module with module revision 3.3. The physical module is a 1756-IB16D

module with module revision 3.2. In this case, communication is prevented because the minor revision of the module is lower than expected and may not be compatible with 3.3.

Release notes for individual modules indicate the specific compatibility details.

When a module is created, the module developers consider the module’s development history to implement capabilities that emulate those of the previous module. However, the developers cannot know future developments. Because of this, when a system is configured, we recommend that you configure the module by using the earliest, that is, lowest, revision of the physical module that you believe will be used in the system. By doing this, you can avoid the case of a physical module rejecting the keying request because it is an earlier revision than the one configured in the software.

20 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix HART Analog I/O Modules Chapter 1

EXAMPLE

Module Configuration Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IB16D

Major Revision = 2 Minor Revision = 1

Physical Module Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IB16D

Major Revision = 3 Minor Revision = 2

Communication is allowed.

IMPORTANT

In the following scenario, Compatible keying allows I/O communication: The module configuration is for a 1756-IB16D module with module revision 2.1. The physical module is a 1756-IB16D

module with module revision 3.2. In this case, communication is allowed because the major revision of the physical module is higher than expected and the module determines that it is compatible with the prior major revision.

Changing electronic keying selections online may cause the I/O communication connection to the module to be disrupted and may result in a loss of data.

Disabled Keying

Disabled 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.

ATTENTION: Be extremely cautious when using Disabled keying; if used incorrectly, this option can lead to personal injury or death, property damage, or economic loss.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 21

Chapter 1 ControlLogix HART Analog I/O Modules

EXAMPLE

Module Configuration Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IA16 Major Revision = 3 Minor Revision = 1

Physical Module Vendor = Allen-Bradley Product Type = Analog Input Module Catalog Number = 1756-IF16 Major Revision = 3 Minor Revision = 2

Communication is prevented.

Module Configuration Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IA16 Major Revision = 2 Minor Revision = 1

Physical Module Vendor = Allen-Bradley Product Type = Digital Input Module Catalog Number = 1756-IB16 Major Revision = 3 Minor Revision = 2

Communication is allowed.

In the following scenario, Disable keying prevents I/O communication: The module configuration is for a 1756-IA16 digital input module. The physical module is a 1756-IF16 analog input

module. In this case, communication is prevented because the analog module rejects the data formats that the digital module configuration requests.

If you use Disabled keying, you must take full responsibility for understanding whether the module that is being used can fulfill the functional requirements of the application.

22 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

In the following scenario, Disable keying allows I/O communication: The module configuration is for a 1756-IA16 digital input module. The physical module is a 1756-IB16 digital input

module. In this case, communication is allowed because the two digital modules share common data formats.

ControlLogix HART Analog I/O Modules Chapter 1

IMPORTANT

Changing electronic keying selections online may cause the I/O communication connection to the module to be disrupted and may result in a loss of data.

Timestamping

Controllers within the ControlLogix chassis maintain a system clock. This clock is also known as the coordinated system time (CST). You can configure your analog I/O modules to access this clock and timestamp input data or output echo data when the module multicasts to the system.

This feature provides accurate calculations between events to help you identify the sequence of events in either fault conditions or in the course of normal I/O operations. The system clock can be used between multiple modules in the same chassis.

Each module maintains a rolling timestamp that is unrelated to the coordinated system time. The rolling timestamp is a continuously running 15-bit timer that counts in milliseconds.

For input modules, whenever a module scans its channels, it also records the value of the rolling timestamp at that time. Your program can then use the last two rolling timestamp values and calculate the interval between receipt of data or the time when new data was received.

For output modules, the rolling timestamp value is updated only when new values are applied to the Digital to Analog Converter (DAC).

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 23

Chapter 1 ControlLogix HART Analog I/O Modules

Module Scaling

When using scaling, you change a quantity from one notation to another.

To scale a channel, choose two points along the module's operating range and apply corresponding low and high unit values to those points.

Scaling lets you configure the module to return data to the controller in units that match the quantity being measured. For example, the analog input module can provide the temperature in degrees Celsius or the pressure in mbar. An analog output module might have commanded values represented in % of stroke of a valve. This makes it easier to use the values in your control program than by using the raw signal value in mA.

Units like gallons, percent, mbar, psi, celsius, liters, and liters/minute are referred to as Engineering Units.

For more information about scaling, see Scaling to Engineering Units on page 98

24 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Module Installation

Chapter

Introduction

The 1756-IF8H, 1756-OF8H, and 1756-IF16H analog modules use the HART protocol with eight and 16 channels, respectively. This chapter describes basic installation procedures.

The table explains the topics discussed in this chapter.

Topic Page

Environment and Enclosure 26 Preventing Electrostatic Discharge 26 European Hazardous Location Approval 26 North American Hazardous Location Approval 27 Removal and Insertion Under Power (RIUP) 28 Before You Begin 28 Module Accessories 28 Power Requirements 29 Install the Module 30 Key the Removable Terminal Block/Interface Module 31 Wire the Removable Terminal Block 32 Ground the Module 32 Wire the Module 34 Removal Terminal Block Assembly and Installation 34 Remove the Removable Terminal Block 36 Remove the Module 37

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 25

Chapter 2 Module Installation

Environment and Enclosure

ATT ENTI ON: This equipment is intended for use in a Pollution Degree 2

industrial environment, in overvoltage Category II applications (as defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.

This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR 11. Without appropriate precautions, there may be difficulties with electromagnetic compatibility in residential and other environments due to conducted and radiated disturbances.

This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed for those specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from accessibility to live parts. The enclosure must have suitable flame-retardant properties to prevent or minimize the spread of flame, complying with a flame spread rating of 5VA, V2, V1, V0 (or equivalent) if non-metallic. The interior of the enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications.

In addition to this publication, see the following:

• Industrial Automation Wiring and Grounding Guidelines, publication

1770-4.1

, for additional installation requirements

• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the

degrees of protection provided by enclosures

Preventing Electrostatic Discharge

European Hazardous Location Approval

ATTENTION: This equipment is sensitive to electrostatic discharge, which

can cause internal damage and affect normal operation. Follow these guidelines when you handle this equipment:

• Touch a grounded object to discharge potential static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component boards.

• Do not touch circuit components inside the equipment.

• Use a static-safe workstation, if available.

• Store the equipment in appropriate static-safe packaging when not in

use.

European Zone 2 Certification (The following applies when the product bears the EX marking.)

This equipment is intended for use in potentially explosive atmospheres as defined by European Union Directive 94/9/EC and has been found to comply with the Essential Health and Safety Requirements relating to the design and construction of Category 3 equipment intended for use in Zone 2 potentially explosive atmospheres, given in Annex II to this Directive.

Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079-15 and EN 60079-0.

26 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

North American Hazardous Location Approval

Module Installation Chapter 2

WARNING:

• This equipment must be installed in an enclosure providing at least IP54

protection when applied in Zone 2 environments.

• This equipment shall be used within its specified ratings defined by

Rockwell Automation.

• Provision shall be made to prevent the rated voltage from being exceeded

by transient disturbances of more than 40% when applied in Zone 2 environments.

• This equipment must be used only with ATEX certified Rockwell

Automation backplanes.

• Secure any external connections that mate to this equipment by using

screws, sliding latches, threaded connectors, or other means provided with this product.

• Do not disconnect equipment unless power has been removed or the area

is known to be nonhazardous.

The following information applies when operating this equipment in hazardous locations:

Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class I Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous locations only. Each product is supplied with markings on the rating nameplate indicating the hazardous location temperature code. When combining products within a system, the most adverse temperature code (lowest "T" number) may be used to help determine the overall temperature code of the system. Combinations of equipment in your system are subject to investigation by the local Authority Having Jurisdiction at the time of installation.

EXPLOSION HAZARD

• Do not disconnect equipment unless power

has been removed or the area is known to be nonhazardous.

• Do not disconnect connections to this

equipment unless power has been removed or the area is known to be nonhazardous. Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product.

• Substitution of components may impair

suitability for Class I, Division 2.

• If this product contains batteries, they must

only be changed in an area known to be nonhazardous.

Informations sur l’utilisation de cet équipement en environnements dangereux:

Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent qu'à une utilisation en environnements de Classe I Division 2 Groupes A, B, C, D dangereux et non dangereux. Chaque produit est livré avec des marquages sur sa plaque d'identification qui indiquent le code de température pour les environnements dangereux. Lorsque plusieurs produits sont combinés dans un système, le code de température le plus défavorable (code de température le plus faible) peut être utilisé pour déterminer le code de température global du système. Les combinaisons d'équipements dans le système sont sujettes à inspection par les autorités locales qualifiées au moment de l'installation.

RISQUE D’EXPLOSION

• Couper le courant ou s'assurer que

l'environnement est classé non dangereux avant de débrancher l'équipement.

• Couper le courant ou s'assurer que

l'environnement est classé non dangereux avant de débrancher les connecteurs. Fixer tous les connecteurs externes reliés à cet équipement à l'aide de vis, loquets coulissants, connecteurs filetés ou autres moyens fournis avec ce produit.

• La substitution de composants peut rendre cet

équipement inadapté à une utilisation en environnement de Classe I, Division 2.

• S'assurer que l'environnement est classé non

dangereux avant de changer les piles.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 27

Chapter 2 Module Installation

IMPORTANT

Removal and Insertion Under Power (RIUP)

Before You Begin

WARNING: When you insert or remove the module 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. Repeated electrical arcing causes excessive wear to contacts on both the module and its mating connector. Worn contacts may create electrical resistance that can affect module operation.

ATTENTION: This equipment is not resistant to sunlight or other sources of UV radiation.

Before you install your module, you should have already:

• Installed and grounded a 1756 chassis and power supply.

• Ordered and received a removable terminal block (RTB) or

1492 interface module (IFM) and its components for your application.

Module Accessories

These modules mount in a ControlLogix chassis and use a separately-ordered removable terminal block (RTB) or a 1492 interface module (IFM) to connect all field-side wiring.

The ControlLogix HART analog modules use one of the following RTBs and support these IFMs.

Module RTBs

1756-IF8H • 1756-TBCH 36-position cage clamp RTB

1756-IF16H • 1756-TBCH 36-position cage clamp RTB

1756-OF8H • 1756-TBNH 20-position NEMA RTB

(1) Use an extended-depth cover (1756-TBE) for applications with heavy gauge wiring or requiring additional

routing space.

(2) See the IFMs for the respective modules on page 192. Consult the documentation that came with it to connect

all wiring.

(1)

• 1756-TBS6H 36-position spring clamp RTB

• 1756-TBSH 20-position spring clamp RTB

ATTENTION: The ControlLogix system has been agency certified using only

the ControlLogix RTBs (catalog numbers 1756-TBCH and 1756-TBS6H). Any application that requires agency certification of the ControlLogix system using other wiring termination methods may require application specific approval by the certifying agency.

(2)

IFMs

• 1492-ACABLExUD (current)

• 1492-ACABLExUC (voltage)

• 1492-ACABLExUB

• 1492-ACABLExWB (current)

• 1492-ACABLExWA (voltage)

28 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Module Installation Chapter 2

IMPORTANT

Power Requirements

ATTENTION: To comply with the CE low voltage directive (LVD), all

connected I/O must be powered from a source compliant with safety extra low voltage (SELV) or protected extra low voltage (PELV).

WARNING: Use supply wires suitable for 30 °C (86 °F) above surrounding ambient.

These modules receive power from the 1756 chassis power supply and require these two sources of power from the backplane.

Module Power Requirements, max 1756-IF8H • 300 mA at 5.1V DC

• 135 mA at 24V DC

1756-IF16H • 200 mA at 5.1V DC

• 125 mA at 24V DC

1756-OF8H • 200 mA at 5.1 V DC

• 230 mA at 24 V DC

The 1756-OF8H module requires more power than the standard 1756-OF8 module. You can have a maximum of 12 1756-OF8H modules per chassis.

ATTENTION: Personnel responsible for the application of safety-related programmable electronic systems (PES) shall be aware of the safety requirements in the application of the system and shall be trained in using the system.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 29

Chapter 2 Module Installation

20861

Locking Tab

20862

Install the Module

You can install or remove the module while chassis power is applied.

ATTENTION: The module is designed to support removal and insertion under power (RIUP). However, when you remove or insert an RTB with fieldside power applied, unintended machine motion or loss of process control can occur. Exercise extreme caution when using this feature.

1. Align the circuit board with the top and bottom chassis guides.

2. Slide the module into the chassis until the module locking tabs click.

30 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Module Installation Chapter 2

U-shaped Bands

20850

Wedge-shaped Tab

20851

Key the Removable Terminal Block/Interface Module

Wedge-shaped keying tabs and U-shaped keying bands come with your RTB to prevent connecting the wrong wires to your module. Key the positions on the module that correspond to unkeyed positions on the RTB. For example, if you key the first position on the module, leave the first position on the RTB unkeyed.

1. To key the module, insert the U-shaped band and push the band until it snaps into place.

2. To key the RTB/IFM, insert the wedge-shaped tab with the rounded edge first and push the tab until it stops.

You can reposition the tabs to re-key future module applications.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 31

Chapter 2 Module Installation

IMPORTANT

a.Remove a

length of cable jacket from the connecting cable.

b.Pull the foil shield and bare the drain wire from the insulated wire.

c.Twist the foil shield and drain wire together to form a single strand.

d.Attach a ground lug and apply heat shrink tubing to the exit area.

20104

Drain Wire

Field Device

43183

Wire the Removable Terminal Block

Ground the Module

WARNING: If you connect or disconnect wiring while the field-side

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.

Wire the RTB with a 3.3 mm (0.13 in.) screwdriver before installing it onto the module. Shielded cable is required when using this module. We recommend using Belden 8761 cable to wire the RTB. The RTB terminations can

accommodate 2.1…0.25 mm

(14…22 AWG) shielded wire and a torque

of 0.5 N•m (4.4 lb•in.).

ATTENTION: When using the 1756-TBCH RTB, do not wire more than two

0.33...1.3 mm

(22...16 AWG) conductors on any single terminal. Use only the

same size wires with no intermixing of solid and stranded wire types. When using the 1756-TBS6H RTB, do not wire more than 1 conductor on any

single terminal.

Use the following information to ground the module.

Connect the Grounded End of the Cable

1. Ground the drain wire.

We recommend grounding the drain wire at the field-side. If you cannot ground at the field-side, ground at an earth ground on the chassis as shown.

2. Connect the insulated wires to the field-side.

32 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Module Installation Chapter 2

Chassis Mounting Tab

Drain Wire with Ground Lug

4M or 5M (#10 or #12) Phillips Screw and Star Washer (or SEM screw)

4M or 5M (#10 or #12) Star Washer

20918

Spring Clamp RTB

Cage Clamp RTB

a. Strip 10 mm (0.4 in.) maximum length

of wire.

b. Insert the screwdriver into the inner

hole of the RTB.

c. Insert the wire into the open terminal

and remove the screwdriver.

a. Strip 8.3 mm (0.33 in.) maximum length

of wire. b. Insert the wire into the open terminal. c. Turn the screw clockwise to close the

terminal on the wire.

If you cannot ground at the field device, follow these steps.

1. Prepare one end of the cable as shown in step 1 on page 32

Ground at an earth ground on the chassis.

Connect the drain wire to a chassis mounting tab. Use any chassis mounting tab that is designated as a functional signal ground.

2. Connect the insulated wires to the field device.

Connect the Ungrounded End of the Cable

Follow these steps to connect the ungrounded end of the cable to the clamp.

1. Cut the foil shield and drain wire back to the cable casing and apply shrink wrap.

2. Connect the insulated wires to the RTB.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 33

Chapter 2 Module Installation

20858-M

Wire the Module

Removal Terminal Block Assembly and Installation

Refer to the individual module chapters for wiring information.

For this module Page

1756-IF8H 60 1756-IF16H 72 1756-OF8H 83

The following sections describe the steps needed to assemble and install the RTB.

Assemble the Removable Terminal Block and the Housing

1. Align the grooves at the bottom of each side of the housing with the

side edges of the RTB.

2. Slide the RTB into the housing until it snaps into place.

Item Description

1 Housing cover 2 Groove 3 Side edge of RTB 4 Strain relief area

34 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Module Installation Chapter 2

Module Guide

RTB Guides

Locking Tab

20854

Install the Removable Terminal Block

WARNING: When you connect or disconnect the Removable Terminal

Block (RTB) with field side power applied, 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.

Before installing the RTB, make certain of the following items:

• The field-side wiring of the RTB has been completed.

• The RTB housing is snapped into place on the RTB.

• The RTB housing is closed.

• The locking tab at the top of the module is unlocked.

• The power is removed or the area is nonhazardous.

1. Align the side, top, and bottom RTB guides with the side, top, and bottom module guides.

2. Press quickly and evenly to seat the RTB on the module until the latches snap into place.

3. Slide the locking tab down to lock the RTB onto the module.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 35

Chapter 2 Module Installation

42517

20855

Remove the Removable Terminal Block

ATTENTION: The RTB is designed to support removal and insertion under

power (RIUP). However, when you remove or insert an RTB with field-side power applied, unintended machine motion or loss of process control can occur. Exercise extreme caution when using this feature. We recommended that field-side power be removed before removing the module.

Before removing the module, you must remove the RTB.

1. Unlock the locking tab at the top of the module.

2. Open the RTB door and pull the RTB off the module.

36 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Module Installation Chapter 2

20856

20857

Remove the Module

Do these steps to remove a module.

1. Push in the top and bottom locking tabs.

2. Pull the module out of the chassis.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 37

Chapter 2 Module Installation

Notes:

38 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix Module Operation

Chapter

Introduction

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

Typically, each module in the system has only one owner. Input modules can have more than one owner. Output modules are limited to a single owner.

By using the Producer/Consumer model, ControlLogix I/O modules can produce data without having been polled by a controller first. The modules produce the data and any owner or listen-only controller device can consume it.

For example, an input module produces data and any number of controllers can consume the data at the same time. This eliminates the need for one controller to send the data to another controller.

The table explains the topics discussed in this chapter.

Topic Page

Direct Connections 40 Input Module Operation 40 Input Modules in a Local Chassis 41 Input Modules in a Remote Chassis 44 Output Module Operation 46 Output Modules in a Local Chassis 46 Output Modules in a Remote Chassis 47 Listen-only Mode 49 Multiple Owners of Input Modules 49 Configuration Changes in an Input Module with Multiple Owners 51 Unicast Communication 51

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 39

Chapter 3 ControlLogix Module Operation

Direct Connections

A direct connection is a real-time data transfer link between the controller and the device that occupies the slot that the configuration data references. ControlLogix analog I/O modules use direct connections only.

When module configuration data is downloaded to an owner-controller, the controller attempts to establish a direct connection to each of the modules the data references.

If a controller has configuration data referencing a slot in the control system, the controller periodically checks for the presence of a device there. When a device’s presence is first detected, the controller automatically sends the configuration data and one of the following events occurs:

• If the data is appropriate to the module found in the slot, a connection is made and operation begins.

• If the configuration data is not appropriate, the data is rejected and an error code displays in the software. For example, a module’s configuration data can be appropriate except for a mismatch in electronic keying that prevents normal operation. For more information about error codes, see Module

Configuration Errors on page 160.

The controller maintains and monitors its connection with a module. Any break in the connection, such as removal of the module from the chassis while under power, causes the controller to set fault status bits in the data area associated with the module. You can use ladder logic to monitor this data area and detect module failures.

Input Module Operation

40 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

In the ControlLogix system, the owner-controller does not poll analog input modules after a connection is established. The modules multicast their data periodically. Multicast frequency depends on the options chosen during configuration and where in the control system that input module physically resides.

An input module’s communication, or multicasting, behavior varies depending upon whether it operates in the local chassis or in a remote chassis, based on the network type. The following sections detail the differences in data transfers between these setups.

ControlLogix Module Operation Chapter 3

IMPORTANT

On-board Memory

Status Data

Channel Data

Ch 0

Ch 1

Ch 2

Ch 3

Ch 4

Ch 5

Tim estam p

41361

Input Modules in a Local Chassis

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

• Real-time sample

• Requested packet interval

Real Time Sample (RTS)

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

• Scan all of its input channels and store the data into on-board memory.

• Multicast the updated channel data (as well as other status data) to the

backplane of the local chassis.

The real time sample value is set during the initial configuration using RSLogix 5000 software. This value can be adjusted

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 41

anytime.

Chapter 3 ControlLogix Module Operation

On-board Memory

Status Data

Channel Data

Ch 0

Ch 1

Ch 2

Ch 3

Ch 4

Ch 5

Tim estamp

41362

IMPORTANT

Requested Packet Interval (RPI)

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

The requested packet interval instructs the module to multicast the current contents of its on-board memory when the requested packet interval expires (the module does not update its channels prior to the multicast).

Figure 2 -

The requested packet interval value is set during the initial module configuration using RSLogix 5000 software. This value can be adjusted when the controller is in Program mode.

If the real time sample value is less than or equal to the requested packet interval, each multicast of data from the module has updated channel information. In effect, the module is only multicasting at the real time sample rate.

If the real time sample value is greater than the requested packet interval, the module multicasts at both the real time sample rate and the requested packet interval rate. Their respective values dictate how often the owner-controller receives data and how many multicasts from the module contain updated channel data.

42 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix Module Operation Chapter 3

Real Time Sample (RTS) 100 ms - Updated data

Requested Packet Interval 25 ms - Same input data as the previous RTS

25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400

Time (ms)

40946

IMPORTANT

In the example below, the real time sample value is 100 ms and the requested packet interval value is 25 ms. Only every fourth multicast from the module contains updated channel data.

Trigger Event Tasks

When configured to do so, ControlLogix analog input modules can trigger an event task. The event task offers ControlLogix controller users a task that executes a section of logic immediately when an event (receipt of new data) occurs.

Your ControlLogix analog I/O module can trigger event tasks every real time sample, after the module has sampled and multicast its data. Events tasks are useful for synchronizing process variable (PV) samples and proportional integral derivative (PID) calculations.

ControlLogix analog I/O modules can trigger event tasks at every real time sample, but not at the requested packet interval. For example, in the figure, an event task can be only triggered every 100 ms.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 43

Chapter 3 ControlLogix Module Operation

ControlNet Network

Input data at least as often as RPI

Input data in remote chassis at RTS and RPI

Owner-controller ControlNet Bridge Module ControlNet Bridge Module Input Module

Input Module in Remote Chassis with Requested Packet Interval Reserving Spot in Flow of Data

40947

Input Modules in a Remote Chassis

If an input module resides in a remote chassis, the role of the requested packet interval and the module’s real time sample behavior change slightly with respect to getting data to the owner-controller, depending on what network type you are using to connect to the modules.

Remote Input Modules Connected Via ControlNet Network

When remote analog I/O modules are connected to the owner-controller via a scheduled ControlNet network, the requested packet interval and real time sample intervals still define when the module multicasts data within its own chassis. However, only the value of the requested packet interval determines how often the owner-controller receives it over the network.

When an requested packet interval value is specified for an input module in a remote chassis connected by a scheduled ControlNet network, in addition to instructing the module to multicast data within its own chassis, the requested packet interval also reserves a spot in the stream of data flowing across the ControlNet network.

The timing of this reserved spot does not coincide with the exact value of the requested packet interval, but the control system guarantees that the ownercontroller receives data at least as often as the specified requested packet interval.

The reserved spot on the network and the module’s real time sample are asynchronous to each other. This means there are best and worst case scenarios as to when the owner-controller receives updated channel data from the module in a networked chassis.

44 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix Module Operation Chapter 3

TIP

Best Case Scenario - Real Time Sample

In the best case scenario, the module performs a real time sample multicast with updated channel data just before the reserved network slot is made available. In this case, the remotely-located owner-controller receives the data almost immediately.

Worst Case Scenario - Real Time Sample

In the worst case scenario, the module performs a real time sample multicast just after the reserved network slot has passed. In this case, the owner-controller does

not receive updated data until the next scheduled network slot.

Because it is the requested packet interval and not the real time sample that dictates when the module’s data is sent over the network, we recommend the requested packet interval value be set less than or equal to the real time sample to make sure that updated channel data is received by the owner-controller with each receipt of data.

Remote Input Modules Connected Via EtherNet/IP Network

When remote analog input modules are connected to the owner-controller via an EtherNet/IP network, data is transferred to the owner-controller in the following way:

• At the RTS or RPI (whichever is faster), the module broadcasts data within its own chassis.

• The 1756 Ethernet bridge module in the remote chassis immediately sends the module’s data over the network to the owner-controller as long it has not sent data within a time frame that is one-quarter the value of the analog input module’s RPI.

For example, if an analog input module uses an RPI = 100 ms, the Ethernet module sends module data immediately on receiving it if another data packet was not sent within the last 25 ms.

The Ethernet module will either multicast the module’s data to all devices on the network or unicast to a specific owner-controller depending on the setting of the Unicast box, as shown on page 93

For more information, see the Guidelines to Specify an RPI Rate for I/O Modules section in the Logix5000 Controllers Design Considerations Reference Manual, publication

1756-RM094

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 45

Chapter 3 ControlLogix Module Operation

TIP

Data sent from owner at the RPI

Owner-controller Output Module

40949

Output Module Operation

The requested packet interval parameter governs exactly when an analog output module receives data from the owner-controller and when the output module echoes data. An owner-controller sends data to an analog output module at the period specified in the requested packet interval. Data is not sent to the module at the end of the controller’s program scan.

When an analog output module receives new data from an owner-controller (every requested packet interval), the module automatically multicasts or echoes a data value that corresponds to the analog signal present at the output terminals to the rest of the control system. This feature, called Output Data Echo, occurs whether the output module is local or remote.

If the output module is not responding according to how it has been programmed, it could be for one of the following reasons:

• The commanded value falls outside the Configured Limits and is thus

being clamped.

• The commanded value changed faster than the configured max Rate

Limit, and is being clamped.

• The module is in Start-up Hold mode, following a connection break or

Run mode transition waiting for the control system to synchronize with the prevailing setting to facilitate a bumpless startup.

Depending on the value of the requested packet interval, with respect to the length of the controller program scan, the output module can receive and echo data multiple times during one program scan.

Output Modules in a Local Chassis

When the requested packet interval is less than the program scan length, the controller effectively lets the module’s output channels change values multiple times during a single program scan because the output module is not dependent on reaching the end of the program to send data.

When specifying a requested packet interval value for an analog output module, you instruct the controller when to broadcast the output data to the module. If the module resides in the same chassis as the owner-controller, the module receives the data almost immediately after the controller sends it.

46 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix Module Operation Chapter 3

ControlNet Network

Output data at least as often as RPI

Immediate backplane transfers to module

Data sent from owner at module’s RPI rate

Owner-controller ControlNet Bridge Module ControlNet Bridge Module Output Module

41360

Output Module in Remote Chassis with Requested Protocol Interval Reserving a Spot in Flow of Data

Output Modules in a Remote Chassis

If an output module resides in a remote chassis, the role of the requested packet interval changes slightly with respect to getting data from the owner-controller, depending on what network type you are using to connect to the modules.

Remote Output Modules Connected Via ControlNet Network

When remote analog output modules are connected to the owner-controller via a scheduled ControlNet network, in addition to instructing the controller to multicast the output data within its own chassis, the requested packet interval also reserves a spot in the stream of data flowing across the ControlNet network.

The timing of this reserved spot does or does not coincide with the exact value of the requested packet interval, but the control system will guarantee that the output module will receive data at least as often as the specified requested packet interval.

The reserved spot on the network and when the controller sends the output data are asynchronous to each other. This means there are best and worst case scenarios as to when the module receives the output data from the controller in a networked chassis.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 47

Chapter 3 ControlLogix Module Operation

IMPORTANT

Best Case Scenario - Requested Packet Interval

In the best case scenario, the controller sends the output data just before the reserved network slot is available. In this case, the remotely located output module receives the data almost immediately.

Worst Case Scenario - Requested Packet Interval

In the worst case scenario, the controller sends the data just after the reserved network slot has passed. In this case, the module does not receive the data until

the next scheduled network slot.

These best and worst case scenarios indicate the time required for output data to transfer from the controller to the module once the controller has produced it.

The scenarios do not take into account when the module will receive new data (updated by the user program) from the controller. That is a function of the length of the user program and its asynchronous relationship with the requested protocol interval.

Remote Output Modules Connected Via EtherNet/IP Network

When remote analog output modules are connected to the owner-controller via an EtherNet/IP network, the controller multicasts data in the following way:

• At the RPI, the owner-controller multicasts data within its own chassis.

• The 1756-ENBT module in the local chassis immediately sends the data

over the network to the analog output module as long as it has not sent data within a time frame that is 1/4 the value of the analog module’s requested protocol interval.

48 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix Module Operation Chapter 3

IMPORTANT

Input Module Configuration Data Xxxxx Xxxxx Xxxxx

Initial Configuration Initial Configuration

Controller A Controller BInput Module

CTR A CTR B

41056

Listen-only Mode

Any controller in the system can listen to the data from any I/O module (that is, input data or ‘echoed’ output data) even if the controller does not own the module. In other words, the controller does not have to own a module’s configuration data to listen to it.

During the I/O configuration process, you can specify a ‘Listen-Only’ mode in the Connection box of the Module Definition section on the Module Properties dialog box. See page 91

for more details.

Choosing a ‘Listen-Only’ mode option lets the controller and module establish communication without the controller sending any configuration data. In this instance, another controller owns the module being listened to.

If a ‘Listen-Only’ connection is being used by any controller to the module, any connections over the Ethernet network cannot use the Unicast option. See the Unicast box on page 93

The ‘Listen-Only’ controller continues to receive multicast data from the I/O module as long as a connection between an owner-controller and I/O module is maintained.

If the connection between all owner-controllers and the module is broken, the module stops multicasting data and connections to all Listening controllers are also broken.

Multiple Owners of Input Modules

Because listening controllers lose their connections to modules when communication with the owner stop, the ControlLogix system lets you define more than one owner for input modules.

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

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

Figure 3 - Multiple Owners with Identical Configuration Data

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 49

Chapter 3 ControlLogix Module Operation

When multiple controllers are configured to own the same input module, the following events occur:

• When the controllers begin downloading configuration data, both try to establish a connection with the input module.

• Whichever controller’s data arrives first establishes a connection.

• When the second controller’s data arrives, the module compares it to its

current configuration data (the data received and accepted from the first controller).

– If the configuration data sent by the second controller matches the

configuration data sent by the first controller the connection is also accepted.

– If any parameter of the second configuration data is different from the

first, the module rejects the connection; RSLogix 5000 software alerts you to the rejected connection through an error message.

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

50 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

ControlLogix Module Operation Chapter 3

Input Module Configuration Data Xxxxx Xxxxx Xxxxx

Modified Configuration Initial Configuration

Controller A Controller BInput Module

CTR A CTR B

Controller B is unaware that changes were made by Controller A.

Multiple Owners with Changed Configuration Data

41056

IMPORTANT

Configuration Changes in an Input Module with Multiple Owners

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

A dialog box in RSLogix 5000 software alerts you to the possibility of a multiple owner situation and lets you inhibit the connection before changing the module’s configuration. When changing configuration for a module with multiple owners, we recommend the connection be inhibited.

To prevent other owners from receiving potentially erroneous data, you must follow these steps when changing a module’s configuration in a multiple owner scenario while online:

• For each owner-controller, inhibit the controller’s connection to the

module, either in the software on the Connection tab or the dialog box warning of the multiple owner condition.

• Make the appropriate configuration data changes in the software, as

described in the RSLogix 5000 software section of this manual.

• Repeat steps 1 and 2 for all owner-controllers, making the same

changes in all controllers.

• Disable the Inhibit box in each owner’s configuration.

Unicast Communication

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 51

Use unicast EtherNet/IP communication to reduce broadcast network traffic. Some facilities block multicast Ethernet packets as part of their network administration policy. You can configure multicast or unicast connections for I/O modules by using RSLogix 5000 software, version 18 or later.

Unicast connections do the following:

• Allow I/O communication to span multiple subnets

• Reduce network bandwith

• Simplify Ethernet switch configuration

Chapter 3 ControlLogix Module Operation

Notes:

52 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Chapter

IMPORTANT

1756-IF8H HART Analog Input Module

Introduction

Module Features

This chapter describes the features of the 1756-IF8H ControlLogix HART analog input module.

The table explains the topics discussed in this chapter.

Topic Page

Module Features 53 Wiring Diagrams 60 Circuit Diagrams 62 1756-IF8H Module Fault and Status Reporting 63 1756-IF8H Fault Reporting 64 Specifications and Certifications 66

The 1756-IF8H module has the following features:

• Choice of three data formats

The Analog and HART by Channel data type is available only for 1756-IF8H firmware revision 2.1

• Multiple current and voltage input ranges

• Module filter

• Real time sampling

• Underrange and overrange detection

• Process alarms

• Rate alarm

• Wire-off detection

• Highway addressable remote transducer (HART) communication

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 53

Chapter 4 1756-IF8H HART Analog Input Module

Data Formats

Data format determines which values are included in the Input tag of the module and the features that are available to your application. Select the data format on the General tab in RSLogix 5000 software. The following data formats are available for the 1756-IF8H module.

Description

Analog signal

values Analog Only X X Analog and HART PVXXX

Format

Analog and HART by Channel

(1) Available only for 1756-IF8H firmware revision 2.1.

(1)

XXX X

• Choose Analog and HART PV if you prefer the members of your tag to be arranged similar to non-HART analog input modules, with the analog values for all channels grouped together near the end of the tag. This makes it easy to view all eight analog values at once.

• Choose Analog and HART by Channel if you prefer Status, Analog Value, and Device Status for each channel to be together in the tag. This makes it easier to view all of the data related to one field device.

Analog status

HART secondary process variables and device health

HART and Analog data for each channel grouped together in tag

Input Ranges

You can select from a series of operational ranges for each channel on the module. The range designates the minimum and maximum signals that are detectable by the module. Possible ranges include the following:

• -10…10V

• 0…5V

• 0…10V

• 0…20 mA

• 4…20 mA (HART instruments use this range.)

54 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF8H HART Analog Input Module Chapter 4

IMPORTANT

.707

60 Hz

Module Filter

The module filter attenuates the input signal beginning at the specified frequency. This feature is applied on a module-wide basis, affecting all channels.

The module attenuates the selected frequency by approximately -3 dB or 0.707 of the applied amplitude. An input signal with frequencies above the selected frequency is attenuated more while frequencies below the selection receive no attenuation.

In addition to frequency rejection, a by-product of the filter selection is the minimum sample rate (RTS) that is available. For example, the 1000 Hz selection does not attenuate any frequencies less than 1000 Hz, and provides for sampling of all 16 channels within 18 ms. The 10 Hz selection attenuates all frequencies above 10 Hz and provides only for sampling all 16 channels within 488 ms.

60 Hz is the default setting for the module filter. Do not use the 1000 Hz module filter with HART instruments.

Use the following table to choose a module filter setting.

Table 2 - Module Filter Selections with Associated Performance Data

Module Filter Setting (-3 dB)

Minimum Sample Time (ms) (RTS) 488 328 248 88 88 56 28 18 Effective Resolution (+/-10V range) 17 bits 17 bits 17 bits 16 bits 16 bits 15 bits 14 bits 12 bits

Effective Resolution (0…10V range) 16 bits 16 bits 16 bits 15 bits 15 bits 14 bits 13 bits 11 bits

Effective Resolution (0…5V, 0 …20 mA, 4…20 mA range)

-3 dB Frequency 7.80 Hz 11.70 Hz 15.60 Hz 39.30 Hz 39.30 Hz 65.54 Hz 163.9 Hz 659.7 Hz 50 Hz Rejection 95 dB 85 dB 38 dB 4 dB 4 dB 2 dB 0.5 dB 0.1 dB 60 Hz Rejection 97 dB 88 dB 65 dB 7 dB 7 dB 2.5 dB 0.6 dB 0.1 dB

(1) Worst case settling time to 100% of a step change is double the real time sample time.

(1)

10 Hz 15 Hz 20 Hz 50 Hz 60 Hz 100 Hz 250 Hz 1000 Hz

0.16 mV 0.16 mV 0.16 mV 0.31 mV 0.31 mV 0.62 mV 1.25 mV 5.0 mV

0.16 mV 0.16 mV 0.16 mV 0.31 mV 0.31 mV 0.62 mV 1.25 mV 5.0 mV 15 bits 15 bits 15 bits 14 bits 14 bits 13 bits 12 bits 10 bits

0.16 mV

0.63 μA

0.16 mV

0.63 μA

0.16 mV

0.63 μA

0.31 mV

1.25 μA

0.31 mV

1.25 μA

0.62 mV

2.5 μA

1.25 mV

5.0 μA

5.0 mV

20.0 μA

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 55

Chapter 4 1756-IF8H HART Analog Input Module

Real Time Sampling

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

During module configuration, you specify a real time sampling (RTS) period and a requested packet interval (RPI) period. Both of these features instruct the module to multicast data, but only the RTS feature instructs the module to scan its channels before multicasting.

For more RTS information, see Real Time Sample (RTS) on page 41

Underrange and Overrange Detection

The module detects when it is operating beyond limits of the input range. This status indication tells you that the input signal is not being measured accurately because the signal is beyond the measuring capability of the module. For example, the module cannot distinguish between 10.25V and 20V.

The following table shows the input ranges of the 1756-IF8H module and the lowest and highest signal available in each range before the module detects an underrange and overrange condition.

Table 3 - Low and High Signal Limits on the 1756-IF8H Module

Input Module Available Range Lowest Signal in

1756-IF8H -10…10V

0…10V 0…5V 0…20 mA 4…20 mA

Range

-10.25V 0V 0V 0 mA

3.42 mA

Highest Signal in Range

10.25V

5.125V

20.58 mA

56 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF8H HART Analog Input Module Chapter 4

Yn = Yn-1 + (Xn – Yn-1)

[Δ t]

Δ t + TA

Yn = present output, filtered peak voltage (PV) Yn-1 = previous output, filtered PV Δt = module channel update time (seconds) TA = digital filter time constant (seconds) Xn = present input, unfiltered PV

Digital Filter

The digital filter smooths input data noise transients. This feature is applied on a per channel basis.

The digital filter value specifies the time constant for a digital first order lag filter on the input. It is specified in units of milliseconds. A value of 0 disables the filter.

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

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

Figure 4 - Filter Response

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 57

Chapter 4 1756-IF8H HART Analog Input Module

43153

High high

Low low

Low

High

Alarm deadbands

High high alarm turns OFF High alarm remains ON

High high alarm turns ON High alarm remains ON

Normal input range

Low low alarms turns OFF Low alarm remains ON

High alarm turns OFF

Low low alarms turns ON Low alarm remains ON

Low alarms turns OFFLow alarms turns ON

High alarm turns ON

Process Alarms

Process alarms alert you when the module has exceeded configured high or low thresholds for each channel. You can latch process alarms. These are set at the following configurable alarm trigger points:

• High high

• High

• Low

• Low low

The values for each limit are entered in scaled engineering units.

Alarm Deadband

You can configure an alarm deadband to work with the process alarms. The deadband lets the process alarm status bit remain set, despite the alarm condition disappearing, as long as the input data remains within the deadband of the process alarm.

The figure below shows input data that sets each of the alarms at some point during module operation. In this example, Latching is disabled; therefore, each alarm turns OFF when the condition that caused it to set returns to normal.

Table 4 - Input Data That Sets Each Of the Alarms

58 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF8H HART Analog Input Module Chapter 4

Rate Alarm

The value for the Rate Alarm Limit is entered in scaled engineering units per second. The rate alarm triggers if the rate of change between input samples for each channel exceeds the specified rate-alarm trigger point for that channel. Rate Alarm uses the signal value after filtering by the Module Filter and before the Digital Filter is applied.

Wire-off Detection

The 1756-IF8H modules alert you when a signal wire is disconnected from one of its channels or the RTB is removed from the module. When a wire-off condition occurs for this module, two events occur:

• Input data for that channel changes to a specific scaled value.

• A fault bit is set in the input tag, which may indicate the presence of a

wire-off condition.

Table 5 - Wire-off Detection

Input Range Wiring Problem Condition Reported in Input Tag

Voltage -10 V…+ 10 V

0 V …+5 V 0 V…+10 V

Current 0 …20 mA RTB removed or INx and

4…20 mA RTB removed or INx and

INx or INx removed Maximum scaled value

I RTN-x jumper removed Only INx removed (jumper in

place) Only jumper removed Maximum scaled value

I RTN-x jumper removed Only INx removed (jumper in

place) Only jumper removed Maximum scaled value

Because 1756-IF8H modules can be applied in voltage or current applications, differences exist as to how a wire-off condition is detected in each application.

identifies the conditions that are reported in the input tag when a wiring

Ta b l e 5

anomaly is detected.

Input Data changes to ChXOverrange ChXBrokenWire ChXUnderrange

(overrange value)

Maximum scaled value (overrange value)

Minimum scaled value (underrange value)

(overrange value) Maximum scaled value

(overrange value) Minimum scaled value

(underrange value)

(overrange value)

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 59

Chapter 4 1756-IF8H HART Analog Input Module

RTN

IN4+ IN4IN5+ IN5RTN IN6+ IN6IN7+ IN7-

IN0+ IN0IN1+ IN1-

IN2+ IN2IN3+ IN3-

I RTN-0 NC I RTN-1 NC

I RTN-2 NC I RTN-3 NC

RTN

I RTN-4 NC I RTN-5 NC RTN I RTN-6 NC I RTN-7 NC

2 4 6

8 10 12 14 16 18 20 22 24 26 28 30 32 34 36

1 3 5 7

9 11 13 15 17 19 21 23 25 27 29 31 33 35

+ V

- V

Voltage Input

44222

Channel Usage Pin #

0IN0+2

IN0- 4

1IN1+6

IN1- 8

2IN2+12

IN2- 14

3IN3+16

IN3- 18

4IN4+20

IN4- 22

5IN5+24

IN5- 26

6IN6+30

IN6- 32

7IN7+34

IN7- 36

Voltage Inputs

Current Inputs

RTN

IN4+ IN4IN5+ IN5RTN IN6+ IN6IN7+ IN7-

IN0+ IN0IN1+ IN1-

IN2+ IN2IN3+ IN3-

I RTN- 0 NC I RTN- 1 NC

I RTN- 2 NC I RTN- 3 NC

RTN

I RTN- 4 NC I RTN- 5 NC RTN I RTN- 6 NC I RTN- 7 NC

2 4 6

8 10 12 14 16 18 20 22 24 26 28 30 32 34 36

1 3 5 7

9 11 13 15 17 19 21 23 25 27 29 31 33 35

XMTR

+ -

2-wire Current Input

2-wire

4-wire Current Input

4-wire MTR

24V DC Power Supply

44223

Channel Usage Pin #

0 iRTN0 1

IN0+ 2 IN0- 4

1 iRTN1 5

IN1+ 6 IN1- 8

2iRTN211

IN2+ 12 IN2- 14

3iRTN315

IN3+ 16 IN3- 18

4iRTN419

IN4+ 20 IN4- 22

5iRTN523

IN5+ 24 IN5- 26

6iRTN629

IN6+ 30 IN6- 32

7iRTN733

IN7+ 34 IN7- 36

Wiring Diagrams

See the figures and tables that show how to wire the module for voltage and current inputs. HART communication is active with current inputs only.

Figure 5 - Voltage and Current Inputs

60 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF8H HART Analog Input Module Chapter 4

Power Supply 1

HART Device 1

HART Device 2

IN0+ IRTN-0

IRTN-1

RTN

IN1+

IN0-

IN 1-

32138-M

Power Supply 1

HART Device 1

HART Device 2

Power Supply 2

IN0+ IRTN-0

IRTN-1

RTN

IN1+

IN0-

IN1-

Ground wire from AC source common to both DC power supplies

32139-M

The 1756-IF8H is a differential input module. However, there are limitations on its use in Differential mode. Any time the low ends of the terminal block pins are connected together, they must also be jumpered to the RTN pin on the terminal block. There are two scenarios in which this happens.

First, if a single power supply is used for multiple devices, then the low end from each channel is connected together and connected to the ground return of the power supply. See the following diagram.

Figure 6 - Single Power Supply with Multiple HART Devices

The second way for channels to share a ground is to have multiple power supplies hooked to the same ground. In this case the low ends of the channels are effectively connected together by the common grounds of the power supplies.

Figure 7 - Multiple Power Supplies with a Common Ground

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 61

Chapter 4 1756-IF8H HART Analog Input Module

Power Supply 1

HART Device 1

HART Device 2

Power Supply 2

Ground wire isolated from each other

IN0+ IRTN-0

IRTN-1

RTN

IN1+

IN0-

IN1-

The low end of the terminal block pins are now isolated from each other and the inputs can be configured as true differential inputs as long as the voltage difference between them does not exceed 7V.

32140-M

0.01 μF

Analog to Digital Converter

22 KΩ

10 MΩ

RTN RTN RTN

RTN

-15 V

Jumper

0.01 μF

22 KΩ

10 MΩ

249 Ω 1/4 Watt

INO+

IRTN-O

INO-

+15 V

Differential Current Input

For devices powered by individual supplies, when the ground potential of the supplies is expected to differ, Differential mode is recommended. This prevents ground loop currents from flowing between the supplies. However, the potential difference allowable between the supplies must remain within the specified limits.

Figure 8 - Power Supplies with Isolated Grounds

Circuit Diagrams

62 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Some devices, such as AC powered four-wire devices, are recommended to be used in Differential mode only. It is best if differential and single-ended types are not combined onto the same terminal block, that is, all should be single-ended or all should be differential.

This section shows the 1756-IF8H module’s input circuit diagrams.

Figure 9 - Simplified 1756-IF8H Current Input Circuit

input

1756-IF8H HART Analog Input Module Chapter 4

0.01 μF

Analog to Digital Converter

22 KΩ

10 MΩ

-15 V

0.01 μF

22 KΩ

10 MΩ

249 Ω 1/4 Watt

INO+

I RTN-O

INO-

+15 V

Differential Voltage Inputs

RTN RTN RTN

RTN

Figure 10 - Simplified 1756-IF8H Voltage Input Circuit

1756-IF8H Module Fault and Status Reporting

The 1756-IF8H module multicasts status/fault data to the controller with its channel data. The fault data is arranged to let you choose the level of granularity you desire for examining fault conditions. Three levels of tags work together to provide an increasing degree of detail as to the specific cause of faults on the module.

lists tags you can examine in ladder logic to indicate when a fault has

Ta b l e 6

occurred.

Table 6 - Tags That Can Be Examined in Ladder Logic

Tag Description Tag Name

Module Fault Word This word provides fault summary reporting. ModuleFaults ModuleFaults Channel Fault Word This word provides underrange, overrange, and

Channel Status Word These words provide individual channel underrange

HART Faults This provides HART communication status. HARTFaults, ChxHARTFault Chx.DeviceStatus.HARTFault HART Device Status This provides HART field device health. HART.ChxDevice Status Chx.DeviceStatus.FieldDeviceStatus

(1) Available only for 1756-IF8H firmware revision 2.1.

communication fault reporting.

and overrange fault indications and reporting for process alarms, rate alarms, and calibration faults.

Analog and HART PV

ChannelFaults ChxFault

ChxStatus Chx.DeviceStatus

Tag Name Analog and HART by Channel

ChannelFaults ChxFault

Chx.DeviceStatus.AlarmStatus

(1)

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 63

Chapter 4 1756-IF8H HART Analog Input Module

If set, any bit in the Channel Fault word also sets the Analog Group Fault in the Module Fault word.

A channel calibration fault sets the calibration fault in the Module Fault word.

An underrange, overrange condition sets appropriate Channel Fault bits.

When the module is calibrating, all bits in the Channel Fault word are set.

Alarm bits 0…4 in the Channel Status word do not set additional bits at any higher level. You must monitor these conditions here.

41514

Module Faults

Channel Faults

Channel Status Tags

Analog

GroupFault

Calibrating1CalFault

6, 5, 4, and 0 are not used for fault reporting

Ch7Fault6Ch6Fault

Ch5Fault4Ch4Fault

Ch3Fault2Ch2Fault1Ch1Fault0Ch0Fault

CalFault

Underrange5Overrange4RateAlarm3LAlarm

HAlarm1LLAlarm0HHAlarm

Ch0

Ch1

Ch2

Ch3

Ch4

Ch5

Ch6

Ch7

One set of tags for each channel

Updated

StatusReady

1756-IF8H Fault Reporting

The graphic below offers an overview of the fault reporting process for the 1756-IF8H module.

64 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF8H HART Analog Input Module Chapter 4

1756-IF8H Module Fault Word Bits

Bits in this word provide the highest level of fault detection. A nonzero condition in this word reveals that a fault exists on the module. You can examine further to isolate the fault. Ta b l e 7

lists tags that can be examined in ladder logic to indicate

when a fault has occurred.

Table 7 - Tags That Can Be Examined in Ladder Logic

Tag Description

Analog Group Fault This bit is set when any bits in the Channel Fault word are set. Its tag name is AnalogGroupFault. Calibrating This bit is set when any channel is being calibrated. When this bit is set, all bits in the Channel Fault word are set. Its tag

Calibration Fault This bit is set when any of the individual Channel Calibration Fault bits are set. Its tag name is CalFault.

name is Calibrating.

1756-IF8H Channel Fault Tags

During normal module operation, bits in the Channel Fault word are set if any of the respective channels has an Under or Overrange condition. Checking this word for a nonzero value is a quick way to check for Under or Overrange conditions on the module.

lists the conditions that set all Channel Fault word bits.

Ta b l e 8

Table 8 - Conditions That Set All Channel Fault Word Bits

This Condition Sets All Channel Fault Word Bits And Causes the Module to Display the Following in

A channel is being calibrated 16#00FF A communication fault occurred between the module and its owner-controller 16#FFFF

the Channel Fault Word Bits

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 65

Chapter 4 1756-IF8H HART Analog Input Module

1756-IF8H Channel Status Tags

Ta b l e 9 describes the channel status tags.

Table 9 - Tags That Show Channel Status

Tag Bit Description

ChxCalFault 7 This bit is set if an error occurs during calibration for Channel x, causing a bad calibration. Also sets CalFault in the

ChxUnderrange 6 This bit is set when the analog signal is less than or equal to the minimum detectable signal. Because the signal cannot

ChxOverrange 5 This bit is set when the analog signal is greater than or equal to the maximum detectable signal. Because the signal

ChxRateAlarm

ChxLAlarm 3 This bit is set when the requested input value is less than the configured low limit value. It remains set until the

ChxHAlarm 2 This bit is set when the requested input value is greater than the configured high limit value. It remains set until the

ChxLLAlarm 1 This bit is set when the requested input value is less than the configured low low limit value. It remains set until the

ChxHHAlarm 0 This bit is set when the requested input value is greater than the configured high high limit value. It remains set until the

(1)

4 This bit is set when the rate of change between input samples for each channel exceeds the specified rate-alarm trigger

Module Faults.

be measured, it may be significantly below the minimum value. Also sets ChxFault in the Channel Faults.

cannot be measured, it may be significantly above the maximum value. Also sets ChxFault in the Channel Faults.

point for the channel. Both positive and negative changes can cause this alarm.

requested input is greater than the low limit. If the bit is latched, it remains set until it is unlatched.

requested input is less than the high limit. If the bit is latched, it remains set until it is unlatched.

requested input is greater than the low low limit. If the bit is latched, it remains set until it is unlatched.

requested input is less than the high high limit. If the bit is latched, it remains set until it is unlatched.

(1) Alarm bits 0…4 in the Channel Status word do not set additional bits at any higher level.

Specifications and Certifications

See the 1756 ControlLogix I/O Modules Specifications Technical Data, publication 1756-TD002

, for specific module specifications and certifications.

66 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Chapter

1756-IF16H HART Analog Input Module

Introduction

Module Features

This chapter describes the features of the 1756-IF16H ControlLogix HART analog current input module.

The table explains the topics discussed in this chapter.

Topic Page

Module Features 67 Circuit Diagram 74 1756-IF16H Module Fault and Status Reporting 75 1756-IF16H Fault Reporting 76 Specifications and Certifications 77

The 1756-IF16H module has the following features:

• Choice of three data formats

• 0…20 mA or 4…20 mA input ranges

• Module filter

• Real time sampling

• Underrange and overrange detection

• Wire-off detection

• Highway addressable remote transducer (HART) communication

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 67

Chapter 5 1756-IF16H HART Analog Input Module

Data Formats

Description

Analog signal

values Analog Only X X Analog and HART PVXXX

Format

Analog and HART by Channel

XXX X

Analog status

HART secondary process variables and device health

HART and Analog data for each channel grouped together in tag

Input Ranges

Two operational ranges are available for each channel on the module. The range designates the minimum and maximum signals that are detectable by the module. The two ranges are:

• 0…20 mA

• 4…20 mA (HART instruments use this range.)

68 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF16H HART Analog Input Module Chapter 5

IMPORTANT

.707

60 Hz

Module Filter

The module filter attenuates the input signal beginning at the specified frequency. This feature is applied on a module-wide basis, affecting all channels.

The module attenuates the selected frequency by approximately -3 dB or 0.707 of the applied amplitude.

An input signal with frequencies above the selected frequency is attenuated more while frequencies below the selection receive no attenuation.

In addition to frequency rejection, a by-product of the filter selection is the minimum sample rate (RTS) that is available. For example, the 1000 Hz selection does not attenuate any frequencies less than 1000 Hz, and provides for sampling of all 16 channels within 18 ms. The 15 Hz selection attenuates all frequencies above 15 Hz and provides only for sampling all 16 channels within 328 ms.

Do not use the 1000 Hz module filter with HART instruments.

60 Hz is the default setting for the module filter. This setting provides approximately 3 dB of attenuation of a 60 Hz input.

Use the following table to choose a module filter setting.

Table 10 - Module Filter Selections with Associated Performance Data

Module Filter Selection (-3dB)

Minimum Sample Time (RTS)

Effective Resolution 18 bits 18 bits 17 bits 17 bits 16 bits 16 bits 15 bits

50 Hz Rejection 74 dB 48 dB 6 dB 6 dB 1 dB 0.1 dB N/A 60 Hz Rejection 74 dB 97 dB 9 dB 9 dB 2 dB 0.2 dB N/A

15 Hz 20 Hz 50 Hz 60 Hz 100 Hz 250 Hz 1000 Hz

(1)

328 ms 275 ms 115 ms 115 ms 61 ms 25 ms 11 ms

0.08 μA0.08 μA0.16 μA0.16 μA0.32 μA0.32 μA0.64 μA

(1) Worst case settling time to 100% of a step change is double the real time sample time.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 69

Chapter 5 1756-IF16H HART Analog Input Module

Real Time Sampling (RTS)

Underrange and Overrange Detection

The following table shows the input ranges of the 1756-IF16H module and the lowest and highest signal available in each range before the module detects an underrange and overrange condition.

Table 11 - Low and High Signal Limits on the 1756-IF16H Module

Module Available Range Lowest Signal in

1756-IF16H 0…20 mA

4…20 mA

Range

0 mA

3.42 mA

Highest Signal in Range

20.58 mA

70 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF16H HART Analog Input Module Chapter 5

Yn = Yn-1 + (Xn – Yn-1)

[Δ t]

Δ t + TA

Digital Filter

The digital filter smooths input data noise transients. This feature is applied on a per channel basis.

The digital filter value specifies the time constant for a digital first order lag filter on the input. It is specified in units of milliseconds. A value of 0 disables the filter.

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

Figure 11 - Filter Response

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 71

Chapter 5 1756-IF16H HART Analog Input Module

+ -

2 Wire HART Device

4 Wire HART Device

IN0+ IN1+ IN2+ IN3+

RTN IN4+ IN5+ IN6+ IN7+ IN8+ IN9+

IN10+ IN11+

RTN

IN12+ IN13+ IN14+ IN15+

IN0IN1IN2IN3RTN IN4IN5IN6IN7IN8IN9IN10IN11RTN IN12IN13IN14IN15-

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36

1 3 5 7

9 11 13 15 17 19 21 23 25 27 29 31 33 35

24V DC Power

Supply

24V DC Power Supply

4 Wire XMTR

2 Wire

XMTR

45124

Channel Pin # Usage Usage Pin # 00 2 IN00+ IN00- 1 01 4 IN01+ IN01- 3 02 6 IN02+ IN02- 5 03 8 IN03+ IN03- 7

10 RTN RTN 9 04 12 IN04+ IN04- 11 05 14 IN05+ IN05- 13 06 16 IN06+ IN06- 15 07 18 IN07+ IN07- 17 08 20 IN08+ IN08- 19 09 22 IN09+ IN09- 21 10 24 IN10+ IN10- 23 11 26 IN11+ IN11- 25

28 RTN RTN 27 12 30 IN12+ IN12+ 29 13 32 IN13+ IN13+ 31 14 34 IN14+ IN14+ 33 15 36 IN15+ IN15+ 35

Wire-off Detection

The 1756-IF16H module alerts you when a signal wire is disconnected from one of its channels or the RTB is removed from the module if the channel is configured for 4…20 mA range. When a wire-off condition occurs for this module, two events occur:

• Input data for that channel changes to the scaled value corresponding to the Underrange condition.

• A fault bit is set in the input tag (ChxxUnderrange and ChxxBrokenWire tags are set to 1), which may indicate the presence of a wire-off condition.

Wiring Diagram

Use this information to wire the current inputs.

Figure 12 - Current Inputs

72 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF16H HART Analog Input Module Chapter 5

Power Supply 1

HART Device 1

HART Device 2

RTN

Because the low end of the terminal block pins are connected together, they must also be connected to RTN.

45120

IN00+

IN00-

IN01+

IN01-

Ground wire from AC source common to both DC power supplies

Power Supply 1

Power Supply 2

The low end of the terminal block pins are hooked together via the common ground of the power supples and must be connected to the RTN pin.

HART Device 1

HART Device 2

RTN

Jumper low end to RTN on terminal block

45119

IN00+

IN00-

IN01+

IN01-

The 1756-IF16H is a differential input module. However there are limitations on its use in differential mode. Any time the low ends of the terminal block pins are connected together they must also be jumpered to the RTN pin on the terminal block. There are two scenarios in which this happens.

First, if a single power supply is used for multiple devices then the low end from each channel is connected together and connected to the ground return of the power supply. See the following diagram.

Figure 13 - Single Power Supply with Multiple HART Devices

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 73

Figure 14 - Multiple Power Supplies with a Common Ground

Chapter 5 1756-IF16H HART Analog Input Module

Ground wire isolated from each other.

Power Supply 1

Power Supply 2

The low end of the terminal block pins are now isolated from each other and the inputs can be configured as true differential inputs as long as the voltage difference between them does not exceed 7V.

HART Device 1

HART Device 2

RTN

45121

23.7 Ω

Analog to Digital Converter

22 KΩ

RTN

IGND

0.01 μF

113 Ω

10 MΩ

INO+

INO-

Current

Input

45117

22 KΩ

113 Ω

IGND

0.01 μF

10 MΩ

IGND

For devices powered by individual supplies, when the ground potential of the supplies is expected to differ, differential mode is recommended. This prevents ground loop currents from flowing between the supplies. However, the potential difference allowable between the supplies must remain within the specified limits.

Figure 15 - Power Supplies with Isolated Grounds

Circuit Diagram

74 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Some devices ,such as AC powered four wire devices, are recommended to be used in differential mode only. Combinations of differential and single-ended configurations are allowed but care must be taken to insure that the differential input grounds really are isolated from the single-ended inputs.

This figure is a simplified input circuit diagram for the 1756-IF16H module.

Figure 16 - 1756-IF16H Simplified Current Input Circuit

1756-IF16H HART Analog Input Module Chapter 5

1756-IF16H Module Fault and Status Reporting

The 1756-IF16H module sends status/fault data to the controller with its channel data. The fault data is arranged to let you choose the level of granularity you desire for examining fault conditions. Three levels of tags work together to provide an increasing degree of detail as to the specific cause of faults on the module.

Ta b l e 1 2

shows the tags that can be examined in ladder logic to indicate when a

fault has occurred.

Table 12 - Tags That Can Be Examined in Ladder Logic

Tag Description Tag Name

Module Fault Word This word provides fault summary reporting. ModuleFaults ModuleFaults Channel Fault Word This word provides clamp and communication

fault reporting.

Channel Status Tags These words provide individual channel limit, hold,

open wire, ramp status, and calibration faults.

HART Faults This provides HART communication status. HARTFaults,

HART Device Status This provides HART field device health. HART.ChxxDevice Status Chxx.DeviceStatus.FieldDeviceStatus

Analog and HART PV

ChannelFaults ChxxFault

ChxxStatus Chxx.Device Status

ChxxHARTFault

Tag Name Analog and HART by Channel

ChannelFaults ChxxFault

Chxx.DeviceStatus.AlarmStatus Chxx.DeviceStatus.HARTFault

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 75

Chapter 5 1756-IF16H HART Analog Input Module

If set, any bit in the Channel Fault word also sets the Analog Group Fault in the Module Fault word.

A channel calibration fault sets the calibration fault in the Module Fault word.

An underrange, overrange condition sets appropriate Channel Fault bits.

When the module is calibrating, all bits in the Channel Fault word are set.

0…4 are not used

41514

One set of tags for each channel

Module Faults

Channel Faults

Channel Status Tags

Analog

GroupFault

0…5 are not used

Ch15Fault14Ch14Fault

Ch13Fault12Ch12Fault

…

Ch02Fault1Ch01Fault0Ch00Fault

CalFault or

Device.

CalFault

Underrange5Overrange

210

Ch00

Ch01

Ch02

…

Ch12

Ch13

Ch14

Ch15

CalFault

…

Module Status

Calibrating

…

Updated

StatusReady

1756-IF16H Fault Reporting

This graphic offers an overview of the fault reporting process for the 1756-IF16H module.

76 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-IF16H HART Analog Input Module Chapter 5

1756-IF16H Module Fault Word Bits

Bits in this word provide the highest level of fault detection. A nonzero condition in this word reveals that a fault exists on the module. You can examine further to isolate the fault. Ta b l e 1 3

lists tags that can be examined in ladder logic to

indicate when a fault has occurred.

Table 13 - Tags That Can Be Examined in Ladder Logic

Tag Description

Analog Group Fault This bit is set when any bits in the Channel Fault word are set. Its tag name is AnalogGroupFault. Calibration Fault This bit is set when any of the individual Channel Calibration Fault bits are set. Its tag name is CalFault.

1756-IF16H Channel Fault Tags

Channel Fault bits for all channels are also set (16#FFFF) if calibration is being performed or a communication fault has occurred between the module and its owner controller.

1756-IF16H Channel Status Tags

Ta b l e 1 4 describes the channel status tags.

Table 14 - Tags That Show Channel Status

Tag Bit Description

ChxCalFault 7 This bit is set if an error occurs during calibration for Channel x, causing a bad calibration. Also sets CalFault in the

Module Faults.

ChxUnderrange 6 This bit is set when the analog signal is less than or equal to the minimum detectable signal. Because the signal cannot

be measured, it may be significantly below the minimum value. Also sets ChxxFault in the Channel Faults.

ChxOverrange 5 This bit is set when the analog signal is greater than or equal to the maximum detectable signal. Because the signal

cannot be measured, it may be significantly above the maximum value. Also sets ChxxFault in the Channel Faults.

(1) Bits 0…4 are not used.

Specifications and Certifications

(1)

See the 1756 ControlLogix I/O Modules Specifications Technical Data, publication 1756-TD002

, for specific module specifications and certifications.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 77

Chapter 5 1756-IF16H HART Analog Input Module

Notes:

78 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Chapter

IMPORTANT

1756-OF8H HART Analog Output Module

Introduction

Module Features

This chapter describes features of the 1756-OF8H ControlLogix HART analog output module.

The table explains the topics discussed in this chapter.

Topic Page

Module Features 79 Wire the Module 83 Use Module Block and Output Circuit Diagrams 84 1756-OF8H Module Fault and Status Reporting 85 1756-OF8H Fault Reporting 86 Specifications and Certifications 88

The 1756-OF8H module has the following features:

• Choice of three data formats

The Analog and HART by Channel data type is available only for 1756-OF8H firmware revision 2.1

• 15 or 16 bit resolution

• Ramping and rate limiting

• Hold for initialization

• Open wire detection

• Clamping and limited

• Clamp and limit alarms

• Data echo

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 79

Chapter 6 1756-OF8H HART Analog Output Module

Data Formats

(1) Available only for 1756-OF8H firmware revision 2.1.

Description

Analog signal

values Analog Only X X Analog and HART PVXXX

Format

Analog and HART by Channel

(1)

XXX X

Analog status

HART secondary process variables and device health

HART and Analog data for each channel grouped together in tag

Resolution

The output module is capable of 15 or 16 bit resolution.

Number of Significant Bits

16 bits +/- 10.4V 320 μV 15 bits 0…20 mA

Range Resolution

0.65 μA

4…20 mA

80 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-OF8H HART Analog Output Module Chapter 6

Ramping/Rate Limiting

Ramping limits the speed at which an analog output signal can change. This prevents fast transitions in the output from damaging the devices that an output module controls. Ramping is also known as rate limiting.

Ta b l e 1 5

Table 15 - Ramping Types

Ramping Types Description

Run mode ramping This type of ramping occurs when the module is in Run mode and limits

Ramp-to-Program mode This type of ramping occurs when the controller is placed in the

Ramp-to-Fault mode This type of ramping occurs when there is a communication or

describes the types of ramping that are possible.

the rate at which the output changes from one commanded value to another.

Program mode. The present output value changes to the Program Value. If the connection to the module is inhibited, the Program mode value and ramp rate are applied.

controller fault. The output signal changes to the fault value after a communication fault occurs.

The maximum rate of change in outputs is expressed in engineering units per second and called the maximum ramp rate.

For additional information about ramp rate, see Chapter 7

, Configuring the Modules, which describes how you can set Ramp Rate on the output Limits dialog box.

Hold for Initialization

Hold for Initialization causes outputs to hold present state until the value commanded by the controller matches the value at the output terminal within

0.1% of full scale, providing a bumpless transfer.

If Hold for Initialization is selected, outputs hold if any of these conditions occur:

• Initial connection is established after powerup.

• A new connection is established after a communication fault occurs.

• There is a transition to Run mode from Program state.

The ChxInHold bit for a channel indicates that the channel is holding.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 81

Chapter 6 1756-OF8H HART Analog Output Module

Open Wire Detection

This feature detects when current flow is not present at any channel. The 1756-OF8H module must be configured for 0…20 mA or 4…20 mA operation to use this feature. At least 0.1 mA of current must be flowing from the output for detection to occur.

When an open wire condition occurs at any channel, a status bit named ChxOpenWire is set for that channel.

Clamping and Limiting

Clamping limits the output from the analog module to remain within a range configured by the controller, even when the controller commands an output outside that range. This safety feature sets a high clamp and a low clamp.

Once clamps are set for a channel, any data received from the controller that exceeds those clamps sets a limit alarm and transitions the output to that limit but not beyond the configured clamp value. For example, an application may set the high clamp on a module for 8V and the low clamp for -8V. If a controller sends a value corresponding to 9V to the module, the module will only apply 8V to its screw terminals. The signal value actually applied is reflected in the Input Tag ChxData field.

Clamping limits are entered in engineering units.

Clamp and Limit Alarms

This function works directly with clamping. When a module receives a data value from the controller that exceeds clamping limits, it applies the clamping limit to the signal value and sends a status bit to the controller, notifying it that the commanded output data value exceeds the clamping limits.

Using the example, if a channel has clamping limits of 8V and -8V but then receives data to apply 9V, only 8V is applied to the screw terminals and the module sends a status bit back to the controller informing it that the 9V value exceeds the channel’s clamping limits.

Clamping alarms can be disabled or latched on a per channel basis. Clamping limits are entered in engineering units.

82 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-OF8H HART Analog Output Module Chapter 6

44224

Data Echo

Data Echo automatically multicasts channel data values that match the analog value that was applied to the module’s screw terminals at that time.

Fault and status data are also sent. If selected in the Input Data format, HART secondary process variables and device health are also sent.

An example is that I.ChxData is the echo of O.ChxData. They might be different due to Ramp, Clamp, or Hold for Initialization.

The echo value is the current level being attempted. If the wire is off or damaged, the actual current might be 0.

Wire the Module

Use Figure 17 to wire the module. Voltage outputs use the terminal block pins labelled VOUT-# and RTN. Current outputs use the terminal block pins labelled IOUT-# and RTN.

HART communication is active with current outputs only.

Figure 17 - Wiring Diagram for the 1756-OF8H Module

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 83

Chapter 6 1756-OF8H HART Analog Output Module

0.1 μF

D/A Converter

250 Ω

Amplifier

100 pF

50 Ω

16K

RTN RTN RTN

RTN

+18.6V

24V

I OUT - x

V OUT - #

100 Ω

45116

Use Module Block and Output Circuit Diagrams

This section shows the module output circuit diagram.

Figure 18 - 1756-OF8H Output Circuit Diagram

84 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-OF8H HART Analog Output Module Chapter 6

1756-OF8H Module Fault and Status Reporting

The 1756-OF8H modules multicast status and fault data to the controller with their channel data. The fault data is arranged to let you choose the level of granularity you desire for examining fault conditions.

Three levels of tags work together to provide increasing degree of detail as to the specific cause of faults on the module.

Ta b l e 1 6

lists tags that you can examine in ladder logic to indicate when a

fault occurred.

Table 16 - Tags That Can Be Examined in Ladder Logic

Tag Description Tag Name

Module Fault Word This word provides fault summary reporting. ModuleFaults ModuleFaults Channel Fault Word This word provides clamp and communication

fault reporting.

Channel Status Tags These words, one per channel, provide individual

channel limit, hold, open wire, ramp status, and

calibration faults. HART Faults This provides HART communication status. HARTFaults, ChxHARTFault Chx.DeviceStatus.HARTFault HART Device Status This provides HART field device health. HART.ChxDevice Status Chx.DeviceStatus.FieldDeviceStatus

(1) Available only for 1756-OF8H firmware revision 2.1.

Analog and HART PV

ChannelFaults ChxFault

ChxStatus Chx.DeviceStatus

Tag Name Analog and HART by Channel

ChannelFaults ChxFault

Chx.DeviceStatus.AlarmStatus

(1)

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 85

Chapter 6 1756-OF8H HART Analog Output Module

Module Faults

Channel Faults

Channel Status Tags

Analog

GroupFault

65 4

6, 5, 4, and 0 are not used for fault reporting

Not a Number, Output in Hold, and Ramp Alarm conditions do not set additional bits. You must monitor them here.

If set, any bit in the Channel Fault word, also sets the Analog Group Fault in the Module Fault word.

A channel calibration fault sets the calibration fault in the Module Fault word.

When the module is calibrating, all bits in the Channel Fault word are set.

Ch7Fault

41519

Ch6Fault5Ch5Fault4Ch4Fault3Ch3Fault2Ch2Fault1Ch1Fault0Ch0Fault

OpenWire

Bit 6 is not used

NotA

Number

CalFault

InHold

Ramp Alarm

LLimit Alarm

HLimit Alarm

Ch0

Ch1

Ch2

Ch3

Ch4

Ch5

Ch6

Ch7

Calibrating1CalFault

One set of tags for each channel

LoopOutput

Fault

Updated

StatusReady

1756-OF8H Fault Reporting

The graphic below offers an overview of the fault reporting process.

86 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

1756-OF8H HART Analog Output Module Chapter 6

Module Fault Word Bits

Bits in this word provide the highest level of fault detection. A nonzero condition in this word reveals that a fault exists on the module. You can examine further down to isolate the fault.

Ta b l e 1 7

Table 17 - Tags Found in the Module Fault Word

Tag Description Tag Name

Analog Group Fault This bit is set when any bits in the Channel Fault

Calibrating This bit is set when any channel is being

Calibration Fault This bit is set when any of the individual

lists tags that are found in the Module Fault word.

AnalogGroupFault

word are set.

Calibrating calibrated. When this bit is set, all bits in the Channel Fault word are set.

CalFault Channel Calibration Fault bits are set.

Channel Fault Word Bits

During normal module operation, Channel Fault word bits are set if any of the respective channels has a High or Low Limit Alarm or an Open Wire condition (0…20 mA or 4…20 mA configurations only). When using the Channel Fault Word, the 1756-OF8H module uses bits 0…7. Checking this word for a nonzero condition is a quick way to check for these conditions on a channel.

Ta b l e 1 8

lists the conditions that set all Channel Fault word bits.

Table 18 - Conditions That Set All Channel Fault Word Bits

This Condition Sets All Channel Fault Word Bits

A channel is being calibrated 16#00FF A communication fault occurred between

the module and its owner-controller

And Causes the Module to Display the Following in the Channel Fault Word Bits

1#FFFF

Your logic should monitor the Channel Fault bit for a particular output, if you either enable output clamping, if you are checking for an open wire condition (0…20 mA configuration only), or if you need to know if the output module is not communicating with the controller.

Your logic can use the bit in Channel Faults, for example, Ch2Fault, to take failure recovery action, such as signaling CVFault on a PIDE function block.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 87

Chapter 6 1756-OF8H HART Analog Output Module

Channel Status Tags

Any of the channel status words (eight words for 1756-OF8H modules), one for each channel, display a nonzero condition if that particular channel has faulted. Some of these bits set bits in other Fault words.

When the High or Low Limit Alarm bits (ChxHLimitAlarm or ChxLLimit Alarm) in any of the words are set, the appropriate bit is set in the Channel Fault word.

When the Calibration Fault bit (CalFault) is set in any of the words, the Calibration Fault bit (bit 11) is set in the Module Fault word. Ta b l e 1 9 conditions that set each of the word bits.

lists the

Table 19 - Conditions That Set Each of the Word Bits

Tag (status words) Bit Event That Sets This Tag

ChxOpenWire Chx.DeviceStatus.OpenWire

ChxNotaNumber Chx.DeviceStatus.NotANumber

ChxCalFault Chx.DeviceStatus.CalFault

ChxInHold Chx.DeviceStatus.InHold

ChxRampAlarm Chx.DeviceStatus.RampAlarm

ChxLLimitAlarm Chx.DeviceStatus.LLimitAlarm

ChxHLimitAlarm Chx.DeviceStatus.HLimitAlarm

(1) Bit 6 is not used.

(2) This bit does not set additional bits at any higher level.

(2)

7 This bit is set only if the configured Output Range is 0…20 or 4…20 mA and the circuit becomes open

due to a wire falling off or being cut when the output being driven is above 0.1 mA. The bit remains set until correct wiring is restored.

5 This bit is set when the output value received from the controller is NotANumber (the IEEE NaN value).

The output channel holds its last state.

4 This bit is set when an error occurred when calibrating. This bit also sets the appropriate bit in the

Channel Fault word.

3 This bit is set when the output channel is currently holding. The bit resets when the requested Run mode

output value is within 0.1% of full-scale of the current echo value.

2 This bit is set when the output channel’s requested rate of change would exceed the configured

maximum ramp rate requested parameter. It remains set until the output reaches its target value and ramping stops. If the bit is latched, it remains set until it is unlatched.

1 This bit is set when the requested output value is beneath the configured low limit value. It remains set

until the requested output is above the low limit. If the bit is latched, it remains set until it is unlatched.

0 This bit is set when the requested output value is above the configured high limit value. It remains set

until the requested output is below the high limit. If the bit is latched, it remains set until it is unlatched.

(1)

Specifications and Certifications

88 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

See the 1756 ControlLogix I/O Modules Specifications Technical Data, publication 1756-TD002

, for specific module specifications and certifications.

Chapter

IMPORTANT

Configure the Modules with RSLogix 5000 Software

Introduction

Create a New Module

The information in this chapter describes how to configure the ControlLogix HART analog I/O modules with RSLogix 5000 software.

The table explains the topics discussed in this chapter.

Topic Page

Create a New Module 89 General Tab 91 Connection Tab 93 Module Info Tab 94 Configuration Tab - Input Modules 96 Alarm Tab - 1756-IF8H Module 103 Configuration Tab - Output Module 105 Output State Tab - Output Module 107 Limits Tab - Output Module 109 HART Device Info Tab 111 Data in the Input Tags 113

Do these steps to add a ControlLogix HART analog I/O module to your RSLogix 5000 project.

The screen facsimiles show examples for the 1756-IF8H module, but the procedures are the same for the 1756-IF16 H and 1756-OF8H modules.

You cannot make changes to any field in these tabs if you are in Hard Run mode. Hard Run mode means that the keyswitch is in the Run position.

1. From the I/O Configuration tree, right-click the 1756 backplane and choose New Module.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 89

Chapter 7 Configure the Modules with RSLogix 5000 Software

The Select Module window appears.

2. Expand the Analog modules and select your module .

3. Click OK.

The New Module dialog box appears.

90 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Configure the Modules with RSLogix 5000 Software Chapter 7

General Tab

Complete the se instructions for a general configuration.

1. On the General tab, do these steps: a. Type a name for the module. b. Type an optional description for the module. c. Select the slot number for the module.

2. On the Module Definition box, click Change.

The Module Definition dialog box appears.

3. Complete these actions:

Parameter Action Values

Series Displays the series letter that matches your

Revision Choose the revision number that matches the label on the

Electronic Keying Choose the electronic keying method

Connection Choose the connection type • Data - has more tabs on the Module Properties dialog box

Input Data Choose the input data mode • Analog Only

Coordinated System Time Not configurable Timestamped Data Format Not configurable Float

module’s series

side of your module, be sure that the minor revision number also matches

See Electronic Keying on page 17

for more information

N/A

• Exact Match

• Compatible Module (default)

• Disable Keying

than Listen-only because of configuration settings for alarms, calibration

• Listen-only - has no configuration data, does not send output

data (1756-OF8H module) See Listen-only Mode on page 49 for more information.

• Analog and HART PV

• Analog and HART by Channel (available only for

firmware revision 2.1)

See HART Configuration

for more information.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 91

Chapter 7 Configure the Modules with RSLogix 5000 Software

HART Configuration

The Input Data formats on the General tab let you access HART field device data through automatic collection of the HART Field Device Process Variables and Health information.

You can also access HART field device data with pass-through messages. See

Getting HART Data By Using CIP MSG on page 121 Used with Asset Management Software on page 141 for more information.

and HART Modules

Ta b l e 2 0

shows which configuration options provide HART data in the input tag

and which provide pass-through message access.

Table 20 - HART Data Configuration Options

Input Data Format Enable HART Checkbox HART Data Input Tag Present? Pass-through Message Access for

Analog only Not checked No No

Checked Yes

Analog and HART PV Not checked Fields present in tag, but data for

this channel not valid

Checked Yes Yes

Analog and HART by Channel Not checked Fields present in tag, but data for

this channel not valid

Checked Yes Yes

MSG or Asset Management

Even if you are not enabling HART on all channels, the Analog and HART PV input tag includes space for the data, but it will be marked with a HARTFault to indicate it is not valid. This lets you add HART instruments later without disturbing the tag layout.

92 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Configure the Modules with RSLogix 5000 Software Chapter 7

Connection Tab

Use the following information to make selections on the Connection tab.

Parameter Description

Requested Packet Interval Defines when the module multicasts its data onto the local chassis

Inhibit Module Prevents connection to the module. Use only if you do not want the

Major Fault on Controller If Connection Fails While in Run Mode

Use Unicast Connection over EtherNet/IP

backplane.

module put into service. The Logix controller performs a major fault if communication to this

I/O module fails.

Appears only for HART analog modules using RSLogix 5000 software version 18 or later in a remote EtherNet/IP chassis.

Use the default checkbox if there are no other controllers in ’Listen-Only’ mode.

Clear the box if there are other ’listening’ controllers in the system.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 93

Chapter 7 Configure the Modules with RSLogix 5000 Software

Module Info Tab

The Module Info tab displays module and status information. This tab is populated with data that comes directly from the module. The information on this window is displayed when the project is online.

Status

The Status box in the right-hand column of the Module tab displays the module’s current operational state. See the descriptions in the following table.

Parameter Description

Major Fault None, Unrecoverable, or Recoverable. Minor Fault None, Unrecoverable, or Recoverable.

Internal State Indicates the module’s mode. Configured Indicates if the module was configured by an owner controller connected to it.

Owned Indicates if an owner controller is currently connected to the module. Module Identity Displays Match or Mismatch as described below. This field does not take into

Recoverable might mean you have a channel fault such as wire off.

Once a module is configured, it stays configured until the module is reset or power cycled, even if the owner drops connection to the module.

account the Electronic Keying or Minor Revision selections for the module as specified on the General tab.

Displays If the Physical Module

Match Agrees with what is specified on the General tab. For the Match

condition to exist, all of the following must agree:

• Vendor

• Module type (the combination of product type and product code

for a particular vendor)

• Major revision

Mismatch Does not agree with what is specified on the General tab.

(1)

(1) This information applies to the I/O module only and does not apply to adapters, scanners, bridges, or other

communication modules.

94 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Configure the Modules with RSLogix 5000 Software Chapter 7

IMPORTANT

Coordinated System Time (CST)

The CST box in the lower, left-hand column of the Module tab provides the following information.

Parameter Description

Timer Hardware Displays OK or faulted for the timer’s hardware. Timer Sync’ed Displays yes if the module’s timer is coordinated with the master.

Display no if it is not. This indicates if a CST master is providing a time reference to the module. Configure a controller to be the CST Time Master using the Controller Properties tab.

Refresh or Reset Module

Click Refresh to refresh the information or click Reset Module to reset the module to its power-up state.

Resetting the module breaks connections and restores output signals to default conditions.

Applying Changes

If all of the following conditions exist when you click Apply or OK, the information is automatically sent to the controller:

• you are online in Program, Remote Program, or Remote Run mode, and

• this controller is the owner controller, and

• you have changed the module's configuration in the software.

The controller tries to send the information to the module (if the module's connection is not inhibited). If you do not click OK or Apply, your changes are not sent to the controller.

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 95

Chapter 7 Configure the Modules with RSLogix 5000 Software

Changes made to the parameters in the Channel box only apply to the individual channel that is selected.

Changes made to these parameters apply to all channels.

Configuration Tab - Input Modules

The following information describes how to configure the module’s input channels. Differences in the modules are noted.

96 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Configure the Modules with RSLogix 5000 Software Chapter 7

Configure the Individual Channels

With an individual channel button selected, use this table to configure the parameters in the Channel box that apply to the individual channels.

Parameter Action Notes Available in

Enable HART Check or uncheck for the

1756-IF8H and 1756-OF8H modules.

Defaults checked for the 1756-IF16H module.

Scaling Enter scaling values for High

Signal, Low Signal, High Engineering, and Low Engineering.

Input Range Choose a value from the

drop-down menu.

Sensor Offset Enter a value from

-9,999,999…99,999,999 (float).

Digital Filter Select a filter time constant

value from 0…20100 ms.

For descriptions of the other boxes, such as Real Time Sample (RTS), see Configure All Channels

• Input range must be 0…20 mA or 4…20 mA.

• When a channel is not enabled: – HART messages are not sent on this channel. – HART pass-through messages are not sent. – HART data for this channel is not updated in the input tag.

• If you select a HART PV or HART by Channel input tag on the General tab,

process data (PV, SV, TV, and FV) from the HART instrument is included in the input tag. If you selected Analog only, the additional process data is not included in the input tag.

• Regardless of the choice of input tag, HART communication can be enabled for each channel to provide pass-through HART message access. If Enable HART is not checked, this pass-through message access is not available.

• We recommend you Enable HART for any channel that has a HART device connected so that information can be displayed on the HART Device Info tab and accessed by AssetCentre.

• You can check Enable HART on some channels and not on others if only some channels have HART field devices attached.

• Because the HART modem is shared by all the channels, HART response time is better if you enable only the needed HART channels on the 8-channel modules.

See Scaling to Engineering Units on page 98 for more information. No

0…20 mA or 4…20 mA is required for HART. No

• The default value is 0.00.

• The offset value is in engineering units.

• The Sensor Offset is added to the data value to determine signal level.

This field is a first-order lag filter that smooths input transitions. It is called a digital filter because it is calculated in the software by the module, not by a hardware filter. The digital filter is applied to each channel individually, but the module filter applies to all channels, so each channel can have a different digital filter setting to accommodate the specific device attached to that channel.

on page 101.

Hard Run Mode?

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 97

Chapter 7 Configure the Modules with RSLogix 5000 Software

Scaling to Engineering Units

Channel data values in the output tag can be in engineering units such as kg, m, or percent. To configure the relationship between engineering units and the physical signal in volts or mA, set the Low and High Signal and the Low and High Engineering values.

For example, if you have a temperature transmitter on channel 3 that produces 4 mA current at -180 °C (-292 °F) and 20 mA of current at 750 °C (1,382 °F), and you want to use °C in your control program, then configure the values as in the following table.

High 20 750 Low 4 -180

If you are using HART field devices, we recommend setting Engineering High and Low to the field device's Upper Range Value and Lower Range Value so that the field device uses the same engineering units as the 1756-IF8H module. If online, these values are displayed on the HART Device Info tab.

Signal Engineering

See the Scaling Example on page 99

for more information.

Scaling High and Low Signal

Set the High and Low Signal values for the module. The High Signal value must be greater than the Low Signal value. See the following table for the bounds of these signals.

Range Low Limit High Limit

-10…10V -10.00 10.00 0…20 mA 0.00 20.00 4…20 mA 4.00 20.00 0…5V 0.00 5.00 0…10V 0.00 10.00

Scaling High Engineering

Set the High Engineering value for the module. The High Engineering value must not equal the Low Engineering value. This is the value in engineering units that corresponds with a signal value equal to the High signal.

Valid values are in the range of -10,000,000…100,000,000. The default value is 100.00.

Scaling High Engineering appears dimmed in Hard Run mode.

98 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Configure the Modules with RSLogix 5000 Software Chapter 7

Scaling Low Engineering

Set the Low Engineering value for the module. The Low Engineering value must not equal the High Engineering value. This is the value in engineering units that corresponds with a signal value equal to the Low signal.

Valid values are in the range of -10,000,000…100,000,000. The default value is 0.00.

Scaling Example

If you would like the module to tell you how full a tank is, you configure the scaling to give you 0% when the tank is empty and 100% when the tank is full. Suppose your sensor that measures the tank signals 4.5 mA when the tank is empty and 17 mA when the tank is full. You would configure scaling like this:

Rockwell Automation Publication 1756-UM533C-EN-P - February 2011 99

Chapter 7 Configure the Modules with RSLogix 5000 Software

This sets up a relationship between the electrical signal generated by your tank gauge and the number sent to the Logix Controller for use in your control system. Graphically, this relationship looks like this:

Note that the module can measure signals slightly higher and lower than the sensor will provide for this tank. Setting the High or Low Engineering Units will not limit the values to within that range. The module will still measure signals all the way from 4…20 mA. In this example, if the module senses 20 mA, it will report the tank is 124% full. A signal of 0 mA will be reported as -4% full, or ‘less than empty’.

To have the tank level reported in liters instead of percent, put the capacity of the tank as the High Engineering value. If you have a 750 liter tank, in the example above put 750 instead of 100, and you will get the scaling relationship shown by this graph:

100 Rockwell Automation Publication 1756-UM533C-EN-P - February 2011

Rockwell Automation 1756-OF8H User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Summary of Changes

Table of Contents

Preface

ControlLogix HART Analog I/O Modules

Module Components

HART Communication

Asset Management Software

Electronic Keying

Timestamping

Module Scaling

Module Installation

Environment and Enclosure

Preventing Electrostatic Discharge

European Hazardous Location Approval

North American Hazardous Location Approval

Removal and Insertion Under Power (RIUP)

Before You Begin

Module Accessories

Power Requirements

Install the Module

Key the Removable Terminal Block/Interface Module

Wire the Removable Terminal Block

Ground the Module

Wire the Module

Removal Terminal Block Assembly and Installation

Remove the Removable Terminal Block

Remove the Module

Direct Connections

Input Module Operation

Input Modules in a Local Chassis

Input Modules in a Remote Chassis

Output Module Operation

Output Modules in a Local Chassis

Output Modules in a Remote Chassis

Listen-only Mode

Multiple Owners of Input Modules

Configuration Changes in an Input Module with Multiple Owners

Unicast Communication

1756-IF8H HART Analog Input Module

Module Features

Wiring Diagrams

Circuit Diagrams

1756-IF8H Module Fault and Status Reporting

1756-IF8H Fault Reporting

Specifications and Certifications

1756-IF16H HART Analog Input Module

Module Features

Circuit Diagram

1756-IF16H Module Fault and Status Reporting

1756-IF16H Fault Reporting

Specifications and Certifications

1756-OF8H HART Analog Output Module

Wire the Module

Use Module Block and Output Circuit Diagrams

1756-OF8H Module Fault and Status Reporting

1756-OF8H Fault Reporting

Specifications and Certifications

Configure the Modules with RSLogix 5000 Software

Create a New Module

General Tab

Connection Tab

Module Info Tab

Configuration Tab - Input Modules