Rockwell Automation 1768-L45S Compact GuardLogix Controllers - Manual (Page 66)

66 Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Chapter 5 Add, Configure, Monitor, and Replace CIP Safety I/O
Figure 17 - Safety I/O Module Replacement
Replacement with ‘Configure Only When No Safety Signature Exists’
Enabled
When a module is replaced, the configuration will be downloaded from the
safety controller if the DeviceID of the new module matches the original. The
DeviceID is a combination of the node/IP address and the Safety Network
Number (SNN) and is updated whenever the SNN is set.
If the project is configured as ‘Configure Only When No Safety Signature Exists’,
follow the appropriate steps in
Table 16 to replace a POINT Guard I/O module
based on your scenario. Once you have completed the steps correctly, the
DeviceID will match the original, enabling the safety controller to download the
proper module configuration, and re-establish the safety connection.
Table 16 - Replacing a Module
GuardLogix Safety
Signature Exists Replacement
Module Condition Action Required
No No SNN
(Out-of-box) None. The module is ready for use.
Yes or No Same SNN as original
safety task
configuration None. The module is ready for use.
Yes No SNN
(Out-of-box) See Scenario 1 - Replacement Module is Out-of-box and Safety
Signature Exists on page 67
.
Yes
Different SNN from
original safety task
configuration
See Scenario 2 - Replacement Module SNN is Different from Original
and Safety Signature Exists on page 68.
No See Scenario 3 - Replacement Module SNN is Different from Original
and No Safety Signature Exists on page 70
.