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MnM, I am really perplexed. The screenshots and the descriptions seem to me to be somewhat contradictory, but I’m probably missing something. UCSB.S and UCSB.T have to know what the I/O states are that UCSB.R is receiving. All three processors need to know what the other processors are...

Is that copy-righted material from the ELC???

I'm pretty confused (to say the least) about how the DeepSea thingie works. In my experience a synchronizing module will adjust generator speed (what the original poster is calling 'F') to be nearly equal to grid frequency, AND it will also adjust generator terminal voltage (what the original...

MnM, This does not appear to be a Mark V-to-Mark VIe Migration--which is when the I/O cards in the Mark V control panel processor cores are replaced with Mark VIe-compatible cards. Those cards have very different "names" (usually beginning with an M, I believe), and those cards typically use...

So, this is what I think the original poster is on about: And this: I don't know as I've ever seen the "FAIL POSITION" shown on a GE P&ID for a servo-operated device.... I think we are NOT listing the Second Stage Nozzle range properly; in my experience it's always been -15 DGA to +5...

Look for i_arcwho.exe or arcwho.exe in G:\EXEC. They are kind of helpful when trying to troubleshoot these kinds of ARCnet. Yes; each ARCnet ID can only be used once. If the ARCnet card you are using with your "old machine" (which you haven't identified .?.?.?) came from a working <I> (which is...

Actually, you do seem to take it VERY personally, James. But, I can kind of understand why. I have re-read Abby's posts a couple of times and I think he's just trying to understand what could have caused the spread trip. If he had provided the Trip Display or Historical Displays (from Trender)...

CSA is traveling, and ControlsGuy25 has MUCH more knowledge and experience with GE Belfort equipment and systems and--most importantly--their "programming" than I do. Running with alarms is, ..., well, ..., not a really great idea--especially if nothing was done to try to resolve the alarm(s)...

IDOS remaps interrupts and it doesn’t work with all BIOS chips. If I recall correctly, it worked best with PHOENIX BIOS chips, but I may not recall exactly correctly. If I can get to my Mark V notes in a few days I’ll see if I have anything I can add. But I’m headed away from home, not...

Thank you for the feedback. Best of luck with the tuning!

fabio9, Ohhhh, I see untrained, inexperienced people working on multi-million Euro power plants very frequently. In today’s world, where automation sales people say the control systems will and do protect the equipment, owners and supervisors are not spending money for training or experience...

I have a funny story. After the restart of a small industrial steam turbine after an ST maintenance outage the unit could be synchronized but every time the operator started to load the machine it would trip on reverse power. Everyone was CERTAIN the excitation system was to blame. I asked to...

Phil Corso, Discrete inputs to a Mark* normally draw micro amperes of DC current. Solenoids can draw 2 amps or more on inrush, but holding current is usually less than one amp.

A systematic and logical approach to troubleshooting is always the best. As the original poster said, the design of the Mark VIe is such that groups of devices can be somewhat isolated by unplugging power supply cables to different I/O cards. For example, most of the discrete (contact) inputs...

aned77, There are other ways, BUT they take too long to describe and if you’re not familiar with how the I/O is connected to the Mark* it’s very confusing. The thing to remember is that Phil Corso could have provided the link to the thread, but he likes to make people WORK for the information...

The question (as is typical—WITHOUT a question mark for punctuation): “Should I be concern with the stresses from this acceleration and overfueled combustion or do you feel in your experience this is within the tolerance of the machine.” He is asking a mechanically-related question in a...

glenmorangie, Methinks the original poster was simply looking for THE simple answer that anyone with a GE-design Frame 5 heavy duty gas turbine and Mark II turbine control system would intuitively know and be able to explain with one or two simple sentences. 'Cause we ain't hearin' nothun'...

Mechanical-Man, GE-design Frame 5 heavy duty gas turbines are BEASTS—especially Mk II-era machines. They will withstand (and have!) all kinds of abuse (unintentional and/or intentional) and just keep running. It’s not likely the turbine suffered any damage unless it has been poorly maintained...

Does the unit normally run on gas fuel--or another fuel? These "... no load tests on gas fuel ..." are they being done after a maintenance outage? After a trip from load? What kind of tests are being performed (vibration tests; excitation tests; or ???)? What is trying to be checked or...

fabio9, By the way, I don’t intend to go into this kind of detail on every P&ID. (And I didn’t cover the LVDTs. And since ControlsGuy25 has worked on many GE Belfort-designed machines, I am hoping he can explain that device between the filter and the accumulator—from a Belfort perspective...