Analyze the alarms--Process and Diagnostic. You should be able to use ToolboxST to look at the various I/O Packs and processors and see which ones are "in alarm" and which ones aren't. It might also be a good idea to have a close look at the various I/O Packs and processors--and IONET switches and power supplies and such--IN the turbine control panel and not which ones have yellow, orange or red LEDs and if any are not working at all?
If I recall correctly, you can look at the WorkstationST status icon and see what it is indicating.
But, best to start with the alarms--Process and Diagnostic. Not a simple task--but if you're going to work on or be responsible for troubleshooting and maintaining a Mark* turbine control system it's important to learn how they can be informative (or not, as sometimes the case may be--but not very often). For Mark* VIe turbine control systems, almost all of the Diagnostic Alarms for the various I/O Packs and control processors are described in some manner (good or bad)--some along with recommendations for resolving the issue(s)--in the Mark VIe System Guide, in the individual I/O Pack/component sections. If you're not familiar with the System Guide, it's time to get started.
Remember, once a machine with a TMR panel is started and running it can continue to run with only two processors (presuming the I/O was properly configured at the factory and no commissioning personnel made any changes without understanding how the changes might affect running reliability). There may be an entire control processor (<R>, <S> or <T>) that is not working properly, not just a few inputs/outputs on one or I/O Packs/terminal boards.
If the turbine control system has a 125 VDC battery ground situation, it's also a VERY GOOD time to rectify that situation as it can cause unusual and intermittent problems from time to time.
If you want further help please provide a COMPLETE list of ALL active Process AND Diagnostic alarms currently being annunciated by the Mark* VIe. And, tell us what the 125 VDC power supply voltages with respect to earth (ground). CLEAR photographs can be attached to posts and replies here on Control.com.
If you're referring to a case where the software in one of the controllers does not match what is in the ToolboxST file--that can be very difficult to troubleshoot. Usually, it means something in the version of the application code in the ToolboxST file has changed from what is in the controller(s). There were some older Mark* VIe control processors that used Flash cards for memory that sometimes experienced problems and replacing the Flash card would resolve the problem. I believe there are procedures for "flashing" a Flash card and installing it in the control processor in the control processor (UCSx) section of the Mark VIe System Guide, which I believe is GEH-6721. (I'm presuming your turbine control panel uses UCSx control processor; you didn't say.)
And I offer this additional comment that recently I was trying to help someone with a voting mismatch problem--and they kept calling it "not equal"--which in Mark* VIe is not the same as a voting mismatch. I think I'm getting too old for this generation....
I would prefer 1st to check the TCW file. Is it the "ACTUAL" / "ORIGINAL" / "CORRECT" for your system ?
I know many would prefer a back up copies and make modifications (Example Backup of Backup of Backup XXX.TCW), when you go online with that, then it will not be equal.
If your site uses CMS and still you get not equal, then some one in the network might be making modifications.
If that is not the case, then I would recommend to open a support ticket with OEM and seek their inputs.
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