Rockwell Automation 1794-IF4I, -OF4I, IF2XOF2I, -IF4IXT, -IF4ICFXT, -OF4IXT, IF2XOF2IXT FLEX I/O Isolated Analog Modules User Manual

Page 8

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Publication 1794-6.5.8 - January 2010

Table of Contents 8

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Chapter

Writing Configuration to and
Reading Status from Your Module
with a Remote I/O Adapter

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Configuring Your Analog Module . . . . . . . . . . . . . . . . . . . . 53
Range Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Safe State Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Real Time Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Input Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Reading Data From Your Module. . . . . . . . . . . . . . . . . . . . . 57
Mapping Data for the Analog Modules . . . . . . . . . . . . . . . . . 57

8 Input Analog Module (Cat. No. 1794-IF4I) . . . . . . . . . . 58
4 Isolated Output Analog Module (Cat. No. 1794-OF4I) . . 64
2 Input/2 Output Analog Combo Module (Cat. No.
1794-IF2XOF2I) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Chapter Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Chapter

Communication and I/O Image
Table Mapping with the
DeviceNet/ControlNet Adapter

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
About RSNetWorx and RSLogix . . . . . . . . . . . . . . . . . . . . . . 77
Polled I/O Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Adapter Input Status Word . . . . . . . . . . . . . . . . . . . . . . . 78

Mapping Data into the Image Table . . . . . . . . . . . . . . . . . . . 79

4 Input Isolated Analog Module (Cat. No. 1794-IF4I) Image
Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
4 Output Isolated Analog Module (Cat. No. 1794-OF4I) Image
Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Isolated Analog Combo Module (Cat. No. 1794-IF2XOF2I
Series B) Image Table Mapping . . . . . . . . . . . . . . . . . . . 91

Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Chapter

Input, Output, Status and
Configuration Files for Analog
Modules when used with
ControlNet

Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
About the ControlNet Adapter . . . . . . . . . . . . . . . . . . . . . . . 99
Commun ication Over the FLEX I/O Backplane . . . . . . . . . . 99
Polled I/O Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Adapter Input Status Word . . . . . . . . . . . . . . . . . . . . . . 101

Safe State Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Communication Fault Behavior . . . . . . . . . . . . . . . . . . . . . 102
Idle State Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Input Data Behavior Upon Module Removal . . . . . . . . . . . 103

4 Input Isolated Analog Module (Cat. No. 1794-IF4I) Image
Table Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

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