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    Mark6e (MK5 migration) Exhaust Thermocouples Read Low

    2x1 Combined Cycle, 7FA/D11 with Marke 6e (Mark5 migration) While checking exhaust temperature thermocouples we found that all readings on one unit are low ~20 Deg F. We disconnect the Thermocouple at the Mark6e input card (TBQA) and inject 1000 Deg F with a simulator and get readings of 980...
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    Barometric Pressure Transmitter Calibration

    Historically to confirm the accuracy of the Gas Turbine barometric pressure transmitters, we installed a high accuracy Rosemount Barometric Pressure Transmitter and would just compare the readings. If the 2 Gas Turbine Barometers and the additional Rosemount Transmitter read within +/- .05 inhg...
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    Modbus Test Software

    Looking for what other users have had good experience with testing Modbus links. I've used a software long ago but it was difficult to use so wanted to get an updated request out there to see what others use. Would like something to test various Modbus connections, various applications. I see...
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    Mark4 Diagnostic eeprom Fail

    We have a Frame-6B power plant with Mark4 Turbine Control that has a diagnostic that appears to be self explanatory, but wanted some confirmation or to hear if any others have had this happen. We had to power down the Mark4 control system for upstream power system maintenance. We turned off...
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    EX2000 Intermittent "Loss of Communication", No Alarms on Mark6e

    We have a Mark5 to 6e migration with Arcnet to EX2000 and single LCI (Windows 7 HMIs do not have Arcnet.) The plant has been down for scheduled maintenance. After powering up the EX2Ks and LCI we noticed that both GT EX2000 OC displays are occasionally flashing 'Loss of Communication'. The...
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    Mark 5 diagnostic alarms

    Our D11 Steam Turbine is experiencing diagnostic alarms on 2 valve regulator/LVDT 'position diffhigh.' I have calibrated the LVDT 0-100% and the voltages have a max spread between the highest and lowes of .035v. I can't find any info in the GEK.
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    Flow dynamic is affecting stillwell, and level reading, for hydrostatic level transmitter

    Cooling tower level probes have stillwell with 1/2 inch holes every 6 inches and 90 degrees apart, from top to bottom of the 18 foot pit. A strange dynamic has occurred causing the level in the stillwell to change by as much as a foot. It looks like the flow across one of these stillwells is...
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    Mark V solenoid fusing

    Several MarkV sites have encountered fires related to a shorted solenoid valve output (generally powered from QD1 DTBD terminal.) These outputs are not individually fused so a short at the solenoid can and has caused the terminal board to overheat and burst into flames. It is never good to let...
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    Rebuilt Mark5 HMI not working, TCI won't start, error 1331

    This is a 3 unit Mark5 with an HMI at each unit and a server HMI in control room. all running XP. I rebuilt the server HMI and am unable to get TCI, or the project, to start. I am testing our ability to restore an HMI. I am using an available Dell PC, as opposed to the HP brand supplied by GE...
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    Mark 5 HMI virtual drives

    I am trying to understand how the Mark 5 HMI running WinXP creates virtual drives(or drive letter links) without those drive letters being listed in Windows device manager. I need to understand how GE set these HMIs up. If I need to rebuild a box I need to know how the F: and G: drive are...
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