Have you loaded fault ob's ?

Please check next link to get to know if your program and configuration is being supported PLC SIM.

Also check manual of PLCSIM itself please which you can find through this link

Hi, the OBs in the project are as follows:

OB1, OB34, OB35, OB70, OB72, OB80, OB81, OB82, OB83, OB85, OB86, OB87, OB100, OB121, OB122

I am not sure what the error message regarding 'check CPU time-of-day settings refers to.