State of controller when servers are down
In my plant the AS(Aspect server) and CS(Connectivity Server) are of 1oo2 configuration and the controller is PM891. We are using PROFIBUS DP for field network.
I would like to know whether the running sequence will go into HOLD or run normally (till the completion of running sequence) if suddenly all the servers are down due to power failure. Please note that the field network is woring fine at the same time. Also is there any possibility that the sequence will not cut off as required(e.g If i have started a sequnece of transferring material of 500 Kg, and after sometime the servers are down (but the controller and IO panels are UP) then will the phase will be completed after transferring 500 Kg or the complete control system will fail.)
Also suggest how to put the system in to Failsafe mode whenever there is any communication error between controller and CS.
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