Changing PLC clock time

Hello,
My question is this. I have a GE Fanuc Series 90-30 PLC, the clock is off by 1hour and the system uses CIMPLICITY MMI. Any suggestion on how to change the clock time?
Admiral Kmpec

There are two ways to change the the 90-30's clock. First, you can connect a PC running the programming software and change it via hardware configuration.

Second, in ladder logic, add a SVC_REQ function that executes function code 7, properly set up, to write a new value to the clock. Cimplicity HMI includes built-in points with hour/minute/second data. You could write a script that writes the time to %R registers in the PLC and triggers the execution of the SVC_REQ in ladder.

PLC Clock

Thanks for all the help. I'm use to Allen Bradley PLCs with SLCs.