After the linking of new Ovation Windows based DCS system with GE HMI MKV windows NT Based, an application error log -GSM.EXE exception: access violation (0*c0000005)- was being generated in all GE computers (4HMIs) for the two units we have. When this message comes no more data transfer to the new DCS. The operators must sit in the local cabin of the unit in order to observe the unit data. Although there is a communication between GE network and Ovation network. We pinging all GE computers from the Ovation network and vice versa.

 

Umm, ..., er, ..., You seem to be saying that prior to the "linking" of a new Emerson Ovation DCS with a GE Mark V HMI data had been transferred via GSM (GE Standard Messaging protocol) to some other DCS. And that after re-connecting the Ethernet cable from the previous DCS to the new Emerson Ovation DCS that communication has stopped.

Why is that a Mark V problem? If the Mark V was communicating with another control system using GSM before the cable was re-connected to the Emerson Ovation DCS?

It would certainly seem that the something is wrong with the way the Emerson Ovation DCS is requesting the data stream to start, or with the data that is being requested.

But, I will guarantee this is <b>NOT</b> a Mark V problem. GSM is primarily a method for initiating a transfer of data from a GE HMI by another control system, and once the transfer is initiated is continues until it is is interrupted by a hardware problem or until the other control system initiates a stop of the data transfer. Yes; commands to the Mark V(s) can also be sent via GSM, but it is still primarily a one-way data transfer that is initiated by another control system and is controlled (started; stopped; configured) by the other control system. The GE HMI just gets the names of the data points requested from the other control system and starts sending the data point values to the other control system as long as the other control system receives them. Occasionally, the other control system sends commands to the GE HMI to be relayed to the Mark V.

Whoever provided the Emerson Ovation DCS system needs to review their configuration of the Emerson Ovation DCS end of the GSM link. It's not the Ethernet communication if you can ping back and forth. This is an Emerson Ovation DCS problem, not a Mark V problem.

The operators need to get out of the control room once in a while anyway. And, the turbine control compartment is an excellent place for them.

And they will get back to the control room as soon as the supplier and/or commissioning engineer/technician of the Emerson Ovation DCS solves the problem.