S7300 software Redundancy require warm restart after fault

Hi

I have a issue about s7300 software redundancy.

Issue is that

master plc switchover to standby plc if any failure, standby plc become master withou any problem.

but standby plc (old master) doesnt take any data from master. after warm restart it starts.

this issue is same for 2 situtaion.

Maybe you have knowledge about it.

thanks.

Hi,

Can You look in to this Link?

Hello margow

I had a look at your program and prima-facie, your OB1 has not been programmed in accordance with Software Redundancy requirements.

Please follow the SWR manual : https://support.industry.siemens.com/cs/in/en/view/1137637

You cannot have redundant program in OB1 as well as OB 35.
Please program Either OB1 or OB 35 in both CPUs as follows :

    CALL  "SWR_ZYK" , DB5
       DB_WORK_NO   :=DB1
       CALL_POSITION:=TRUE
       RETURN_VAL   :=MW6
       EXT_INFO     :=MW8

      A     DB5.DBX    9.1
      JC    End

   UC FC 1    // Add Redundant Program Here

End:  CALL  "SWR_ZYK" , DB5
       DB_WORK_NO   :=DB1
       CALL_POSITION:=FALSE
       RETURN_VAL   :=MW10
       EXT_INFO     :=MW12

Hope this helps

Cheers
Navnag