Dear All,

I am using a s7-200 plc and an OP.

I have all the alrams in the Protool alarm list and there are numbers noted on the sides.

I have also noted the alarm messages  in the VM 60 area. 

and Event messages in the VM 50 area.

How do I understand the which bit triggers a particular alarm for example:" Communicationerror frequencey contoller -A02"

Please help

Thanks 

Hi,

You can see the address of the bit trigger at the bottom right of protool.

See print screen with protool 6.0 SP3.