How to disable OB1 excution after 1 month in Siemens S7 300

[omar zedan]

Dear All
I have S7 315 cpu I want to disable OB1 excution after 1 month (in Allen bradley you can use GSV" Get system values" to read cpu date and TND instruction "Temprary end " in first rung in main routine)
How can I do that?
How can I set date and time for 315 CPU?
Thanks

[dehell]

Hello,
For STEP7 use SFC1 "read system clock" (use help to know how is work)
For TIA PORTAL use "RD_SYS_T"
Best regards

[omar zedan]

Thanks dehell