Start up for Siemens (OB 100,101,and 102)

Good day to all of you

I knew all this function of OB 100 is (warm restart) OB 101 (Hot restart) and OB 102 (Cold restart)

My question is:
1. Should I make program for every blocks of OB 100, OB 101,and OB 102?
2. If I have made program for OB 100.101,102, should I call them in OB1?
3. How these start up programs work?

And also,Are these Interrupt (OB 30-47) and error behaviour (OB 8-12) are similar that I needed to call it?

I appreciate all your suggestion,
RR,

I love sequence control...

Good day.

from it's name OB 100 called automatically on warm start and OB 101 will be called when a if you want for example reset all MB when a warm restart occurred you need to program this inside OB 101.

Regards.
Marwan

You dont call the OBs, The OBs call you.