Sil 2 safety application requirements 202, 1715 i/o modules in sil 2 safety applications 202, Typical configurations 204 – Rockwell Automation 1715-OF8I Redundant I/O System User Manual User Manual
Page 9: Internal diagnostics 206, Power supplies 206, Requirements for using 1715 i/o modules 207, Energize-to-action requirements 207, Add-on instructions 208, Connection reaction time limit 209, Using the 1715 adapter in sil 2 applications 209
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Rockwell Automation Publication 1715-UM001C-EN-P - March 2014
9
Table of Contents
1715 Redundant I/O System in SIL 2
Safety Applications
SIL 2 Safety Application Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
1715 I/O Modules in SIL 2 Safety Applications . . . . . . . . . . . . . . . . . . . 202
Requirements for Using 1715 I/O Modules . . . . . . . . . . . . . . . . . . . . . . . 207
Energize-to-action Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Requirements for ControlLogix-based SIL 2 Applications . . . . . . . . . . 208
Connection Reaction Time Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Using the 1715 Adapter in SIL 2 Applications. . . . . . . . . . . . . . . . . . . . . 209
Using 1715 I/O Modules in SIL 2 Applications . . . . . . . . . . . . . . . . . . . 210
Considerations for Sensor and Actuator Configurations. . . . . . . . . . . . 214
Specify the Connection Reaction Time Limit and
Requested Packet Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Set Safe State Values for Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Logix System Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Configuring the SIL 2 Task Period and Watchdog . . . . . . . . . . . . . . . . . 222
SIL Task/Program Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Using SIL 2 Add-On Instructions with
1715 Redundant I/O Modules
SIL 2 Add-On Instructions Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Download and Import the Add-On Instructions. . . . . . . . . . . . . . . . . . . 229
Import Add-On Instructions to Upgraded Projects. . . . . . . . . . . . . 230
1715 SIL 2 Periodic Task ‘Period’ Configuration. . . . . . . . . . . . . . . 231
Configure an Input Module Add-On Instruction . . . . . . . . . . . . . . . . . . 234
Configure an Output Module Add-On Instruction . . . . . . . . . . . . . . . . 238
Safety Reaction Time Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . 240