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If you are working from a GE HMI the documentation for EX2100e is in C\Program Files x86\GE Energy\EX2100e Excitation Control\EX2100e\V0### (your version)\pdf. Probably the most helpful would be something like GEH-6780 EX2100e Startup and Installation. Describes all the steps to commission an...

L52B_SEL does land on PTBA and is used in the synch scheme. Detailed in GEH-6195 section 7-10 "Synchronizing", and signal flow diagram D-57. I can't imagine having a chattering L52B_SEL isn't serious. As stated by WTF, the 125 VDC bus is connected to more than just the MK. Battery changers, the...

see attached

CTIM is not a median, its the max comp inlet flange temp. If you want a better compressor inlet temp reference, send the three inlet thermocouples through a median select function and use the output of that. That would allow for a failure high and a failure low to get thrown out. The inlet...

I've split GEH-6121 into two volumes so its small enough to attach. V1 is pages 1-100, V2 is 101-238. Both are searchable. Ctrl+f and search for IA1.

170 IA1_FAIL DCFB Input has failed. GEI-100028 for DCFB attached. Screenshot is from GEH-6121 EX2000 Startup, Adjustment, and Troubleshooting, which is apparently too large to attach. If you have the EX2000 Elementary Diagram you'll find that the DCFB connects to the SHVI via IA1PL. I can't say...

Bently probes come with "incremental scale factors" and tolerances. Below the particular probe I was testing had an ISF of .2 Volt/mil. Using a dial micrometer, just barely kiss the face of the probe at 0, and back the gap out 10 at a time taking voltage readings along the way. Here you can see...

256A1072P005 appears to be an active part (not explicitly listed as obsolete) on the GE Vernova power parts store. Often times when some OEM furnishes a GE part, it can't be directly purchased from that OEM. Qualitrol may be able to sell you something similar, but I'm willing to bet they...

I can't attach the manual because its too large, but search for GFK-1645. Section 15.14 discusses the serial connections and pinouts. You could make your own cables if you are handy enough. The RJ-45 to DB-9 cable is IC200CBL500. There is also a USB to RJ-45 version if you don't have a com port...

No. RJ-45 is a connector format. The individual pins are significant based on the protocol/make/model/OEM design. Below is an EXAMPLE of what some particular device pin designations are, not your device. Get the manual for your particular device and determine the pinout of the connection weather...

DISCLAIMER: ONLY DO THIS WITH A COPY OF A .CIM FILE, NOT YOUR RUNNING FILES. You can save .cim files to interrogate in a text editor by saving it as a .ctx file extension. Right click the COPY .cim file and select edit. Now in Cimedit, save as. Once its .ctx format you can open it with any text...

Interesting. Below is a much newer HMI version where the synchobj ActiveX settings are in the "Control Properties" tab. I honestly haven't had to deal with that old a version of Cimplicity in quite a few years. As WTF has said, a lot of changes have happened over the years, most poorly...

The synchroscope for this vintage of HMI would have been an ActiveX Object and is specifically described in GEH 6126A, page 5-2 (attached). I don't know what maintenance activities have been going on with these HMI's but it sounds like they are old and limping along. These HMIs most likely have...

Good work. One thing to keep in mind in the future when swapping cards around, particularly in <Q> (<R> <S> and <T>), is totalized data and controls constants. You'll notice the checksum for the TOTD sector in <C> and <D> is 0000. That's because TOTD is held in <Q>. If you go swapping cards...

You can also find the proper settings in IOCFG.LST. Open with notepad and search for DTBA, and find the original <CD> INV MSK settings ... provided someone hasn't overwritten it.

Bad refurbs. JLY pinned out for continuity just fine. Brand new TCEA and TCTG installed. New <Y> TCEA went straight to A7. <X> and <Z> never lost A7 just because the TCTG was removed. With the new TCTG installed and power I forced the cross trip and observed ETRs and PTRs in diagnostic counters...

There are two settings in the IO Configurator for digital inputs on the DTBA and DTBB terminal boards. 1st setting is "INV MSK", or inversion mask. 2nd setting is CHG DET, or change detect. INV MSK = 1 means the controller will interpret the inverse state of the contact, essentially an open...

From your CARD_ID results. Regardless of what is going on in <C>, it appears you also have issues with <T>. <R> and <S> appear to return their respective TCEA in <P> and TCDA is <QD1>. This looks like an IONET issue. IONET is twisted pair black and white arcnet daisy chain from <Q> cores, to <P>...

Aside form CARD_ID or Panel Revision List, you can also check IO STATE directly from the DCC/LCC pinpad. Hit the DCC button once, the LED screen should say 186 Monitor. Use the INC or DEC buttons to reach IO STATE and hit enter. Now you can use the INC button to scroll through all of the...