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You've posted this issue before, but our Mark VI expert didn't respond. Your best chance at "recovery" probably lies in using an imaging/ghosting application that will restore to any hard drive. Acronis True Image is very good (newer versions can restore to a hard drive of any size; older...

Collective bargaining agreements and labour laws were (and still are) necessary in some parts of the world. There are many unscrupulous owners and their minions who ignore common sense and diplomacy when dealing with insubordinate employees, which has led to the proliferation of collective...

learner, It would be most helpful if you could provide the name/author/manufacturer of the document where you first encountered these terms. A lot of manufacturers use their own terms for others more widely used in industry. There are many types of speed control, and it depends on the...

Utz, You have indeed answered your own question. Most manufacturers have tables to indicate how much of a differential a particular wattage can overcome. Most valve vendors have representatives that can also do the calculations for you and will gladly make recommendations about the...

A UDH communication issue does NOT cause a turbine trip. I didn't relate the loss of UDH communications to the cause of the trip. All I said was that because there was obviously something amiss with UDH communications prior to the trip that it's likely that during the trip UDH communications...

> We have a problem with operators using the emergency stop circuits to power > down a line rather than doing the "right thing" and going through the sequence of > pressing the individual stop PB. Hmmmmm. The international standard for operators not following plant operating procedures and...

TCRAs are pretty simple cards; 30 relays per card. It's certainly possible that if the cables interconnecting the TCRAs and the DTBC/DTBD cards are damaged, then the TCRA can be damaged. Remember when replacing DTBC/DTBD cards that power may--and quite often--does come from sources other than...

If I recall correctly, the method for "setting" the Mark VI time from the HMI (usually via Toolbox) varied depending on the version of Toolbox. What version of Toolbox is being used? If NTP isn't configured on the HMI, then any setting in Toolbox isn't going to matter. Again, it seems you...

When did this problem start? It's impossible to say what the problem may be or how to fix it without more information. Does the site use NTP (Network Time Protocol) to match HMI and Mark VI time? (There may or may not be a Master Time Signal generator, such as a signal from a satellite...

It's presumed from the original post that the unit is still running or did not shut down or trip because of the damaged cards. The answer to a question like this can only be determined on site by someone who can evaluate the outputs which are affected by the damage. The easiest way to do this...

So, it seems that for some reason UDH communication was lost between the Mark VI and the HMI. It's going to take some time for communications to resynchronize and all background tasks (such as TripLogLive) to get back up to speed. Another thing is that when there is a turbine trip a LOT of...

Thanks, sd. Feedback is the most important contribution!(c) here at control.com. It's what lets others who read these posts know if the information provided was helpful, or a complete miss, and what the ultimate problem and resolution was determined to be. Sometimes, it's the most obvious...

Hydrogen gas, 32767 is at one end of the "list" of possible alarm drop numbers; while not impossible, it's highly unlikely the actual drop number is 32767. It's more likely that there is some miscommunication between the EX and the HMI. What other Process Alarms were annunciated by the...

KKK, I presume "scrapping" is scraping, where the interior walls of pipes are cleaned using an abrasive method to remove deposits and such. One would think scraping (or scrapping; it may be called different things in different parts of the world) would release bits of debris into the gas...

Yes, this is a "feature" of most GE-design heavy duty gas turbine control systems on conventional combustor-equipped machines. It can be very confusing to operators and technicians because they will see the Status Field Message "IGV Temp Control" during the loading, when IGV Temp Control is...

Your response indicates you either haven't tried to access the documentation and materials on site, or you don't have access to the documentation and materials on site. It also points out a very large problem at most plants around the world: the lack of an ongoing training program for new...

Bill (if I may be so informal), In my travels and toils I get asked similar questions a lot. I think the thing that amazes many people is that electric motors are kind of "dumb". They produce the amount of torque required by the device they are driving. If the device requires less torque...

kp, What is your function at the plant? Operator? Inside operator or outside operator? Instrumentation & Control Technician? Operations supervisor? Maintenance supervisor? What kind of training have you received? What information is made available to you at your site? Do you have access...

This particular use of IGV Temperature Control is called "Temperature Matching." Temperature Matching is typically only supplied on combined cycle applications where the plant is cycled on and off each day, sometimes more than once per day. As you say, it's used to try to help match steam...

An AC induction motor is an <b>electric</b> motor.