Time forward error in TOD interrupt

Hi all

I am writing an STL program for S7-318 CPU. Although this mature CPU is more similar to S7-400 than S7-300, I write my question here.

I have enabled the TOD interrupt in HW-Config and added OB10 to my program. It is set to trigger an interrupt once a day. According to S7 manuals, and as I have seen, when I move the time forward (for instance tomorrow or a month in future) the SF led turns on and OB80 is called. In diagnostic buffer, the related info is written too.

Is there any way to turn off SF led without Stop->Run change switch? In OB80, I can detect error and make any logic. But someone should Stop->Run CPU to rectify the issue which is indeed annoying.

Thanks in advance

hi, 

what kind of error is in diagnostic buffer?

Can you provide the buffer as textfile?

regards,

hi

In diagnostic buffer, it is reported: "Time-of-Day interrupt(s) skipped due to new clock setting". And in the help on event 0x05, it is said that "The time was adjusted forwards and the start date and time of time-of-day interrupts was skipped". The SF LED is lit on due to this fault and OB80 was called.

I understand why this fault was occurred. I compared OB80_FLT_ID with 0x05 and write the correct logic inside OB80.

My problem is SF LED which is now on. This makes our technicians confused. I want to find a way to bypass this fault when I adjust the time of the CPU forwards, or whenever this fault happens I can turn off SF LED without switch back the CPU to STOP and then RUN modes.

Thanks