Recommendations for Using Application Mismatch
Original instructions
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General
When using the Application Mismatch feature the following are affected:
Upload Information Management Feature
During online modifications, the system detects that the application-program information in the controller differs from the application-program information in the computer. Because this information is used later when an upload is performed, the system requires you to update this information and constantly presents a confirmation dialog. To avoid constant display of this dialog, use the Upload Information Management feature.
Using the Upload Information Management Feature
Before doing any modifications and at the initial start up of your system, do the following:
Step
Action
1
From the menu, select Tools → Project Settings → General → PLC embedded data.
2
Select Automatic in the Upload Information Management area.
3
Press OK to close the window.
4
Save the program.
5
Download the program to the PLC.
Handling Online Modifications to the Standby CPU
For major modifications to the application program on the Standby CPU, verify that the Standby CPU is in Offline mode.
Two benefits result from this action:
NOTE: If the Standby CPU is online during modifications, there is a possibility of Switchover occurring. If this occurs, the Standby CPU becomes Primary CPU and the process may run with incomplete modifications.
Performing Application Program Transfer
Avoid the possibility of having two different application programs running in the Primary CPU and Standby CPU by performing an application program transfer after completing online modifications with an application mismatch.
Resetting Command Register System Bit %SW60.3
When resetting the Command Register system bit %SW60.3 to 0, you want to avoid the possibility of having two different application programs running in the Primary CPU and Standby CPU.
Step
Action
1
Connect to Primary CPU.
2
Access the Command Register system bit %SW60.3.
3
Reset bit to 0.