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By "NO status" do you mean the STATUS field was empty, or that it displayed "NO Status" or "NO?

anon, >Years ago, I had a recommendation to short the UNUSED (LP) >Speed inputs during autocal if this happens. GE did recommend that if there was no LP shaft on a turbine that the <P> core LP shaft speed pick-ups be jumpered to prevent nuisance Diagnostic Alarms. In fact, towards the end...

oneye14, >Not sure how a P&ID would help as the condenser is a >component part of a process - same applies for control >logic. I wonder of the original poster wasn't asking for a PID, not a P&ID? Just wondering....

Rasheed, So, I just had occasion to see a ToolboxST file for a 7FA.05, and I checked the MBC "block" in the ARES task, and it had a very similar, if not identical name. So, it seems the "block" you are inquiring about is THE Model-Based Control block which is VERY proprietary and about the...

JMarkV, Thanks very much for the feedback! So, I have re-read and re-re-read and re-re-re-read your original post and the replies and I am having a VERY difficult time relating oil temperature and speed. Your original post stated that when the core "drops" it reports "Speed increased more...

novice001, Mark* turbine control systems use a MIMIMUM SELECT function to choose which scheme is used to control the fuel being admitted to the turbine. And, none of the signals you asked about are used to directly control the fuel flow-rate. FSR (Fuel Stroke Reference) is the output of...

Rasheed, GE seems to be producing fewer and fewer help descriptions for their blocks. Don't exactly know why, but I believe that part of it is they are trying to protect their IP (Intellectual Property). I can tell you that a lot of the newer "blocks" are actually macros, and if you expand...

barindra75, Sorry for not catching the spell checker/corrector mistake on your name on my previous post. I've now completely disabled it (the spell checker/corrector). Thanks for the feedback and the kind words. Now if we could only understand why someone clicked on the 'Thumbs-down'...

mabdullahkhan, If it's not always the same pump, then I would be looking for something that is common to both pumps. And I would presume that would include the control system that is turning the pumps on and off. It could be that the discrete outputs for the two pumps (be they solid-state...

Frame6BNewB, As long as the IGVs can travel between 34- and 86 DGA without hitting a stop (actuator stop or ring stop) it should be okay. Unfortunately, we can't post pictures or drawings here on control.com, so it's difficult for us to know exactly which actuator you have and how to tell...

Fram6BNewB, You are calibrating the actuator, stop to stop. The ring stops are just there in the event the actuator stops fail. And, neither the actuator stops nor the ring stops should be at the immediate ends of the desired actuator range of travel (CSKGVMIN to CSKGVMAX). You aren't...

bahindra75, Here's the risks: The inlet air temperature to the Main AA Compressor should NOT exceed 300-325 deg F (approx. 149-163 deg C). The Main AA Compressor spins at tens of thousands of RPM, and increasing the inlet air temperature above the maximum allowable decreases the clearances...

Fram6BNewB, Welcome to control.com. It would have really been helpful if you had told us what control system is being used on the GE-design Frame 6B at your site. After replacing the actuator--and probably the LVDTs--it will be absolutely necessary to calibrate the LVDT feedback. And, if...

Rizwan, Can you be more specific about the device(s) you want to add? Is it a limit switch, a pressure switch, a pressure transmitter, or??? GE typically uses the ANSI Device Nomenclature Standard for device numbering, and adds one or two alpha characters to help identify the system and/or...

Anna Kendrick (or SaraAsghariii), This is a very interesting post: Replacing a Mark IV turbine control system with a Siemens turbine control system to gain Mark VIe benefits. If what you're looking for is state-of-the-art hardware, as well as up-to-date HMIs (operator interfaces with color...

The cause of underspeed when the generator breaker is closed and the unit is producing power is low frequency, which is caused by excessive load with respect to the amount of generation. The alarm is to protect the turbine and axial compressor from operating below its design range--which can...

Rasheed, I think you might be referring to a big block, possibly one used for a 7FA.05 machine. Have you right-clicked on the block, and then clicked on 'Item Help' or 'Block Help' to see what GE might have provided? Have you looked in the Operation & Service Manual provided with the...

<pre>TTRF1 COMBUSTION REFERENCE TEMPERATURE</pre>This is the calculated value of the hot gases passing through the first stage turbine nozzle. It is used for switching combustion modes on DLN combustor-equipped GE-design heavy duty gas turbines. <pre>TTRX Temperature Control...

Awaneesh, I don't have any software to review at this time to address the specific alarm you mentioned, but when a gas turbine is operating below rated speed the air flow through the axial compressor is also less than rsted. This results in higher than normal exhaust temperatures for the same...

Don't forget to check the pump motor itself, and the motor starter. It's not likely that it's the turbine control system or the DCS/BOP control system controlling the pump motor, unless there are Diagnostic Alarms indicating a problem with the auxiliary control outputs to the motor starter, or...