S7-1200 hour counter?

Hi!

Even in the simple Siemens LOGO there was a hour counter, counting the time an, for example, input has been set. Where is this in S7-1200. I've checked the manual and searched the Help but no luck. Do I have to build my own? :/

I do believe so.
If the CPU has an RTC (Real Time Clock) you may be able
to use it instead.
I don't have the S7-1200 software here.