[?]: Problem in replacing CPU 6ES7 315-3AF03

[ELYAS_GH]

Hello,
In a project, due to a CPU issue, I had to replace it and installed a new CPU.
The old CPU is 315-1AF03 and the new CPU is 315-3AF03.
PCS7 V5.2
I downloaded the project without any hardware changes or changes in logic, but the process does not work correctly.
I replaced the old CPU again, downloaded the project, and the process works fine.
What could be the reason?

[CoMod]

new CPU is 315-3AF03

6ES7 315-3AF03 ?
25 year old 6ES7 315-2AF03 is new CPU ?



See Diagnostic buffer in Hardware Config window
Select CPU
menu PLC > Module Information

[ELYAS_GH]

Hello, you are right. I said it was new because it was available as a spare in the warehouse and was unused.
CPU does not stop and no fault occurs.

[CoMod]

I downloaded the project without any hardware changes or changes in logic, but the process does not work correctly.
CPU does not stop and no fault occurs.

Replace PLC in Hardware Config and upload new configuration

[collinsd70]

sounds like you have a change in scan time, you will have to move the logic into timed interrupt OB's to fix this issue, or modify the logic.