I Have Siemes CPU 315 and OP170B. I want to Display and Edit the Date and Time of PLC.
How to perform this?

 

You can use SFC1 to read the date and time into a DB. Then, configure the OP to read the date and time from the DB. Similarly, you can configure the OP to write the date and time to a DB, from which you will write the date and time to the CPU through SFC0. Hope this answers your question.

 

Have a look at this from the Siemens Web site:

http://support.automation.siemens.com/WW/view/en/26961517

 

Thanks to OH - it works perfectly

Thank u [Steve] that link was very informative