Allen-Bradley 1756-IA8D User Manual

6 Rockwell Automation Publication 1756-UM058G-EN-P - November 2012
Table of Contents
Use the System Clock to Timestamp Inputs and Schedule Outputs. 47
Producer/Consumer Communication. . . . . . . . . . . . . . . . . . . . . . . . . . 50
Status Indicator Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Common Features Specific to Input Modules. . . . . . . . . . . . . . . . . . . . . . . 50
Data Transfer on Either Cyclic Time or Change of State . . . . . . . . . 51
Set RPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Enable Change of State. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Software Configurable Filter Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Isolated and Nonisolated Varieties of Input Modules . . . . . . . . . . . . 53
Multiple Input Point Densities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Common Features Specific to Output Modules . . . . . . . . . . . . . . . . . . . . . 54
Configurable Point-level Output States. . . . . . . . . . . . . . . . . . . . . . . . . 55
Output Data Echo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Isolated and Nonisolated Varieties of Output Modules . . . . . . . . . . 56
Multiple Output Point Densities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Electronic Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Field Power Loss Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Diagnostic Latch of Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Time-scheduled Output Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Fault and Status Reporting between Input Modules and Controllers. . 64
Fault and Status Reporting between Output Modules and Controllers 65
Chapter 4
Diagnostic Module Features
Diagnostic Input Module Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Diagnostic Output Module Compatibility. . . . . . . . . . . . . . . . . . . . . . . . . . 68
Diagnostic Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Diagnostic Latch of Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Diagnostic Timestamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
8-Point AC/16-Point DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Point-level Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Features Specific to Diagnostic Input Modules. . . . . . . . . . . . . . . . . . . . . . 71
Diagnostic Change of State for Input Modules . . . . . . . . . . . . . . . . . . 71
Open Wire Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Field Power Loss Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Features Specific to Diagnostic Output Modules . . . . . . . . . . . . . . . . . . . . 75
Field Wiring Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
No Load Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Field-side Output Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Pulse Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Diagnostic Change of State for Output Modules . . . . . . . . . . . . . . . . 79
Fault and Status Reporting between Input Modules and Controllers. . 79
Fault and Status Reporting between Output Modules and Controllers 81

Allen-Bradley 1756-IA8D Specifications

General

Brand	Allen-Bradley
Model	1756-IA8D
Category	Control Unit
Language	English