Plan for Test Edits
Before you edit your program while your system is running, verify that the Retain Test Edits on Switchover setting meets your application requirements for standard tasks.
IMPORTANT:
In Logix SIS, test edits that apply to the safety task are not canceled, regardless of the configuration of the Retain Test Edits on Switchover setting. If an online test edit results in a fault to the primary controller, then the edit causes the same fault on the secondary controller.
For test edits that apply to standard tasks in any type of redundancy system, we recommend that you leave the Retain Test Edits on Switchover checkbox cleared to avoid faulting both controllers when testing your edits.
Use this table to determine the Retain Test Edits on Switchover setting that suits your application requirements for standard tasks.
Standard Task Application Requirement | Retain Test Edits on Switchover Setting |
|---|---|
Help prevent a test edit from faulting the primary and secondary controllers if there is a switchover | Clear the Retain Test Edits on Switchover checkbox. The controller discards the test edits on switchover. |
Keep test edits active, even if there is a switchover and at the risk of faulting both controllers | Select the Retain Test Edits on Switchover checkbox. The controller keeps the test edits active on switchover. |
To access the Retain Test Edits on Switchover checkbox, select the Redundancy tab in the controller properties and then select Advanced.
Retain Test Edits on Switchover
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