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borellimd, Ah, the plot thickeneth. TTKXCOEF has a lot of "history" and mythology behind it. I've never heard a description of TTKXCOEF that I really believe or trust is truly correct. I do know that it's a "multiplier" that's used to bias the exhaust T/C inputs. They are originally...

borellimd, Are you referring to Control Constant TTKXCOEF (or TTKXCOEFF)? If so, both Mark*s should have the same value.

ALSO, please tell if the Mark V is a SIMPLEX or TMR turbine control panel. Have you looked at the Trip Display of the operator interface to determine what is "tripping" the unit? (Most all GE Mark V HMIs (the ones that run some version of MS-Windows and CIMPLICITY), and many newer versions of...

borellimd, GOOD ON YOU for reading the fine manual! The Mark VIe has remote cold junction compensation capability--the ability to sense the temperature at a remote point (other than where the "local" I/O Pack is located). The Mark V did not have that capability/option. I think that's what the...

Dear STLTLS, Does the unit have DLN combustors, and if so, which version of DLN combustion system does it have? How fast is the IGV reference changing from 80 to 86 DGA? Every second? Every two seconds? Every five seconds? What is TNH (or TNH1) doing during these IGV oscillations...

The cold junction compensation in the Mark V was done on each TCQA card (not a typo). I'm not sure if it's done in the Mark V Migration on the equivalent of the TCQA IR if it's done in the I/O Pack(s) of the TCQA equivalent (I think the TCQA equivalent has an I//O Pack; early Mark V Migration...

The great thing about standards is: There are so many to choose from. And probably never moreso than with MODBUS. Just about EVERY MODBUS application between two or more different manufacturers has some kind of unique differences (plural). You're so right, David_2; virtually each and...

Please tell the Process Alarms which are active when you put the unit in CRANKe mode in preparation for an LVDT calibration verification.

David_2, Thanks for the info and the link. I have seen the sintered iron ones, and they would be very nice, too. Whatever is used, it needs to be kept clean. I've seen white vinegar used very successfully (hint, hint!). By the way, I read most of your responses--and you are especially...

gustavo_marcelo, >>If you have two units operating in parallel in island >mode, >>what happens when you then start increasing the excitation >>on one unit? >Field current will increase, the Q also increase with a >reduction in PF. I agree with this; it should happen. >>What...

luowilliam, The tap(s) should be in an area that is not obstructed by any structural steel or any other items which could restrict or block air flow in front of the opening(s). Side- or top penetration is usually best. As for the method of penetration, I have seen just about every possible...

Jhon123, The procedure is to obtain a FORMAT file from a SIMPLEX unit for the system (operator interface AND DCC/SDCC PROM version) you have, download it using the EEPROM Downloader, and reboot. It seems you reconfigured the IONET from <R> through <P> to <QDn>. I don't think that's all...

sangeetha_ma, Thank you very much for the feedback and information!!!

gustavo_marcelo, You seem to have an islanded system at your site, that can be used to gather some data when it separates from the grid. AND, you seem to have some modeling capability, as well? Why don't you provide some data from the plant? Or from the model? Let's say, after the unit...

Isulamu, As mentioned, my knowledge of and experience with aeroderivative gas turbines is very limited.

Jhon123, >I wanna ask, is there a problem with my card or just my >configuration that maybe I forgot to do? Because I don't >have the official instruction to change configuration from >TMR to Simplex. To my knowledge there is no official instruction for converting from TMR to SIMPLEX...

Eddie, My apologies. You didn't provide any background information whatsoever. How long were the durations of the spikes? How long were the durations between the spikes? What kind of turbine (manufacturer; size/rating; type (heavy duty; aeroderivative)? What kind of sensor...

Hi Eddie, >Can there ever be a scenario where hot gases escape in the >forward direction. (Running...steady state.) >Any turbine.... Your question is very vague. Plumbers have a saying: Poop only flows downhill. In other words, things (good or bad) only flow from an area of...

Isulamu, I am not an aero derivative GT expert. And these questions are really not controls-related questions, and I am tired of Droop and Isochronous Speed Control questions. So, I did a little research on bearings. An extremely useful World Wide Website is Wikipedia.com. Look up "thrust...

gustavo_marcelo, >1. What is it, a software based or hardware based comparator? Software. >2. How does it recognize the low value from all the inputs? It compares all of the inputs and selects the lowest of them all to be its output. >3. When the input supposedly to be high, can...