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>I'm just looking for the GE equivalent of gain >and time constants. That sounded like you were looking for P & I values, to me anyway. I might have given the wrong Control Specification section for Speed Control. I believe Sect. 03 is for Temperature Control, and Sect. 02 is for Speed...

Rahul, To my knowledge, there is no OPC package available to communicate directly with a Mark IV. Matrikon has an OPC Server that can communicate with a Mark V and one that can communicate with a Mark VI; that is clear from their website. I believe they probably have a Mark VIe product...

Iqbal, You are welcome. And, you are 100.0000% correct.

ProcessValue, There is nothing wrong with that formula, <b>as was said in the reply</b>. It's just a very old formula, and it is still used in some packages (even with Mark VIe) by some packagers, and I would imagine that even GE still uses it on some applications as well, particularly if the...

HARI, The likely problem is that the SDCC card doesn't know it's installed in <R> core, and needs to have it's Voter ID set to <R>. Refer to the Mark V Maintenance Manual, GEH-5980, Sect. 5-3.2.1, 'VERIFY VOTER ID'. The procedure is in this section, using the SLCC display and keypad to set...

The quote is: "You may find better; but you'll never pay more." In its purest form, droop speed control is proportional control, pure and simple. There is no integral component to pure, "straight" droop speed control, so if you're looking for one, stop. (That's regardless of the governor...

Both have rotating mass. Both need to control speed and or load for their application (generator drive or mechanical drive, such as a compressor or large pump). Both need to control fuel to limit power output to protect the turbine/engine. Both have to be started, accelerated and shut...

Most Mark VIs (and Mark Vs for those of you reading this with Mark Vs) were provided with a file in the site-specific directory called LONGNAME.DAT. (Use Windows Explorer and search the hard drives of the HMI for this file to locate the exact directory/folder where it's located.) This is an...

Iqbal, When you are posting with a problem like this, it's very helpful if you would provide some more information about the equipment at your site. We don't know what the turbine is, what kind of gas valve assembly is in use; nothing. Except what you tell us, which wasn't much. It's great...

As you noted, ProcessValue, the nature of the question is pretty vague. We should likely wait for the originator to clarify or ask any further questions before generalizing about many things. As the original question involved Mark IV and Mark <b>VIe</b>, *NOT* Mark VI, it's going to be...

Droop on GE steam turbine governors has always been a mystery to me. Mostly because most of the steam turbines I have worked on have been at cogeneration facilities, where they are primarily "followers" instead of "prime" generators. So, I can't help with that. The subject of GT droop has...

When this trip event occurs, what is the frequency of the grid? Is it stable or is it fluctuating? If it's fluctuating, how much is it fluctuating? What is the VAr indication immediately prior to the trip event? What is the power factor immediately prior to the event? You keep saying that...

I'm not exactly clear about your question, but we'll start the discussion with this. The main concept behind redundancy in control systems is to provide running reliability. One way to accomplish this is to have multiple controllers, each performing identical decisions about control and...

Bob Johnston has made a good call on this one. It appears that all three processors are calling for the same IGV position and all three processors believe the IGVs are at the same position, so it would seem there is some problem with the output of <S>. I neglected to ask when this problem...

The topic of coking of the liquid fuel portion of dual fuel nozzles has been covered several times on control.com. But, the thread summary said liquid fuel check valves were coking. Which is it? Or is it both? How old is the machine? What kind of liquid fuel check valves are used...

<b>I forgot</b> again <b>to ask: WHEN DID THIS PROBLEM BEGIN?</b> Because in your first post you said you had <b>recently</b> "installed" a Mark VIe, and then you said: >We have printing problem <b>now</b>. Has the problem existed since commissioning, or did it start some time after...

Great question! Are there any Diagnostic Alarms related to the TCQA card also "active" at this time? What is the Null Bias Current value for the IGV regulator/servo-valve output from the I/O Configurator? What is the CSGV value for <R>, <S>, and <T>? What is the CSRGV value for <R>...

Look, if you have water in a hose under pressure, with a nozzle on the end of the hose and that nozzle is closed, then the pressure doesn't do anything. The only way the pressure does something is if the nozzle on the end of the hose is opened and the water flows out of the nozzle. So, the...

There are so many possibilities it's hard to say where to start. GE is now shipping yet <b><i>another</b></i> version of HMI configuration called WorkstationST and within that line of HMIs there are several configurations. But, consistently, none of them is properly documented. So this is kind...

You're most welcome, and you likely have narrowed your troubleshooting with your answer. If the problem started after a period of rain, then it's most likely there is moisture in some switch housing or junction box nearest a switch housing that is OUTSIDE of any turbine- or accessory...