Primary CPU Online Application Modifications with Allowed Application Mismatch
Original instructions
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Procedure
To make online modifications to an application program in the Primary PLC, follow these steps:
Step
Action
1
Verify that the Primary and Standby PLCs are in Run Primary CPU and Run Standby CPU modes.
2
Connect Control Expert to the Primary CPU.
3
Set the Command Register system bit %SW60.3 to 1
4
Modify online the application program.
5
Perform Build Project.
NOTE: If adding/removing modules using CCOTF, use Build Changes.
6
Verify that Primary and Standby PLCs are in Run Primary CPU and Run Standby CPU modes.
7
Perform an application transfer to the Standby CPU.
8
Set the Command Register system bit %SW60.3 to 0.
NOTE: The Command Register system bit is then returned to 0 from 1.
NOTE: For more details, refer to Application Mismatch.