Posts from...
Today, Friday, July 25, 2014
Topic: Power generation equipment control.
from the Controls department...
Why Minimum Value Gate Used in GT controls?
Originally posted by 4_20 mA on 21 January, 2013 - 10:03 am
I have seen this Minimum value gate for controlling GT's and Booster Compressor in couple of CCPP.
New Replies:
Neo, I believe the 33.4% value you are referring to is an upper limit on acceleration...
CSA: I use DEH to refer to steam turbine control. I have one question that is related to this...
fluidflow, Pretty good description; but I would be surprised if FSR actually goes to 33% during...
Topic: Engineering and workplace issues.
from the Operation department...
Using Synthetic Oil in Gas Generator
Originally posted by GE on 24 July, 2014 - 8:55 am
Why use synthetic oil in GE LM 2500 gas turbine?
New Replies:
GE, The gas generator of GE LM units is an aircraft engine, and most aircraft engines are built...
Topic: Power generation equipment control.
from the POWER PLANT department...
IGV for DLN Type Without IBH
Originally posted by ABDI on 24 July, 2014 - 1:56 am
If a turbine has DLN (Dry Low NOx) combustors, IGV exhaust temperature control is not operator-selectable. Is it always on?
New Replies:
Killz has it almost correct, in that the IGVs are used to control the air flow into the...
I do not understand what do you mean by IGV OFF. When IGV is not moving, you will not be able to...
Topic: Power generation equipment control.
from the Power Generation department...
Getting a better understanding of GT control PART 2
Originally posted by Neo on 11 July, 2014 - 10:48 pm
Getting a better understanding of GT control PART 2.
New Replies:
Neo, Seems my reply to this post never got posted.... I've been having problems with this...
CSA: It seems that it is hard for a field engineer to enjoy a "trip",and i feel that...
Topic: Communications systems and equipment.
from the Forum department...
RS-485 Communications
Originally posted by Bill Dolan on 24 June, 2014 - 1:47 pm
RS-485 Communications with Standing Waves
New Replies:
I think I have bulletproofed the install now based on many of your recommendations. Thank you...
Topic: Sensor technologies.
from the Control Systems department...
1oo2 voting for temperature transmitter
Originally posted by christine on 23 July, 2014 - 4:30 am
1oo2 voting for temperature transmitter
New Replies:
http://www.controleng.com/single-article/monitoring-critical-vessel-te mperature/224a1b309e.html ...
you might consider placement in valve-free connecting pipe, but that depends on a number of...
Topic: Power generation equipment control.
from the Change in level as temperature change department...
Lube oil level
Posted by Yassar on 25 July, 2014 - 2:55 am
Lube oil level dropping as temperature increases
Topic: Power generation equipment control.
from the Maintenance department...
Problems with air intake and dirty turbine
Originally posted by Arianna Mambrini on 23 July, 2014 - 4:30 am
Air intake filters clean but turbine dirty
New Replies:
Hello there, Please let us know about the kind of inlet duct and the paint which was applied in...
Arianna, Sounds like the filters are relatively new. When was the turbine last washed before the...
Topic: Power generation equipment control.
from the Mechanical department...
Exit Guide vanes of Gas Turbines
Originally posted by Izhar on 19 July, 2014 - 4:24 pm
Gas turbine exit guide vanes and how to use them
New Replies:
Hello There, Swirl angle is the angle between measured representative exhaust gas...
Thank you so much for such a wonderful reply. Currently we are not facing high spread problem,...
What to say, CSA has left nothing to add. If I had initialized the answer I would have used,...
Izhar, The description below presumes your questions refer to a GE-design heavy duty gas...
Posted by Raymond Laib on 24 July, 2014 - 9:55 pm
PF525 VFD drive faults via Stratix 8000 to be displayed on a HMI.
Topic: Software, including programming, OS issues, etc.
from the Software smithery department...
Ethernet/IP and Python
Originally posted by Mark Q Norman on 22 November, 2013 - 9:31 am
Need some help on using Python to test Ethernet/IP implementation.
New Replies:
Hello, At: http://www.hmisys.com/downloads/msExcel.zip is an Excel file that shows a...
By Lynn August Linse on 24 July, 2014 - 2:03 pm -
Sure, send an email direct to lynnl at digi.com. I've actually been asked quite a bit lately. I am...
Lynn, I'm working on a simulation software based on python, and I need to be able to read and...
Topic: Power generation equipment control.
from the From Excitation Department department...
EX2000 Fault : ST 717_ _PS AC IN and FL 711_ _MCP SYNC
Originally posted by electricalman on 7 July, 2014 - 3:58 am
We have EX2000 with static exciter type which is installed on our Steam Turbine Generator, made by GE.
New Replies:
We also have the same error code 717 on our EX2000. We changed the DCFB board but that did not...
Topic: Information resources, documentation.
from the Forum department...
ATEX certified 24VDC fan
Originally posted by Daniel on 23 July, 2014 - 1:01 pm
Looking for a supplier for a small 24VDC (or 230VAC) Ex-d or Ex-e fan
New Replies:
Hello, EBM-PAPST is a well known manufacturer of fans for use in industrial places. Here is the...
Topic: PLCs and related questions.
from the Automation List department...
cutler-hammer
Originally posted by leblanc49 on 10 March, 2004 - 5:07 pm
software for Cutler-Hammer D100
New Replies:
> There are two small buss fuse in the unit, check them. On which card are the bus fuses?...
Topic: PLCs and related questions.
from the Forum department...
FFL instruction weird behaviour
Posted by Daniel on 23 July, 2014 - 3:00 pm
FFL instruction sometimes doesn't load data into FIFO
Topic: Motion control, servos, steppers, etc.
from the Forum department...
VFD and nominal RPM of motor
Posted by yazooka on 23 July, 2014 - 8:47 am
Nominal RPM on motor plate lower than can be set in VFD
Topic: Continuous process industries, DCS questions.
from the Forum department...
Simple model-based control example
Originally posted by Rupert on 20 July, 2014 - 2:25 pm
MPC example
New Replies:
Good advice. to the original question, all control is model based. > Just playing with...
Just playing with some code will not help you much. The better way is: a) To learn about the...
Topic: Power generation equipment control.
from the Electrical department...
Selection of VCB as per short circuit current
Posted by Shaheed on 23 July, 2014 - 3:22 am
Do we need to replace the VCB of a machine with higher short circuit rating if more machines add parallel at same bus bar.
Topic: Engineering and workplace issues.
from the Controls department...
GE Gas Turbine IGV angle
Originally posted by BND on 28 June, 2014 - 4:31 am
What is the logic? GTG is not operating in Temperature Control mode.
New Replies:
Sameh Salama: Glad to receive your reply.But this is out of my capability, lets ask CSA for...
Topic: Application Questions and Problems
from the CBM department...
lube oil level
Originally posted by syed on 14 July, 2014 - 9:24 am
Which Lube oil tnk level to be used: Absolute or relative
New Replies:
Sam, great detail you have provide. Thank you very much for the response. This is really...
Topic: Software, including programming, OS issues, etc.
from the engineering department...
Modbus RTU utilities
Originally posted by viks on 21 July, 2014 - 2:28 am
help needed in finding the software facilitating reading data from the sensors via RS485 into industrial computer and providing it for a SCADA application.
New Replies:
On http://pvbrowser.org you can find our open source project....
Topic: Sensor technologies.
from the Instrumentation department...
analog 4-20mA output transmision
Originally posted by Kiyani on 10 May, 2012 - 6:02 pm
Analyzers analog output signal 4-20mA transmission
New Replies:
Is it safe to run analog and digital instrument signals in the same mulicore cable? multicore is...
Originally posted by SB on 19 July, 2014 - 4:51 pm
Please help understanding control specification of GE-design heavy duty gas turbine
New Replies:
CSA, Thank you very much! I'll also prefer ignoring the "extra" maths....
Topic: Local and wide area networking in factory automation.
from the Forum department...
Communication Error with MODBUS DCS RTU
Posted by michael on 22 July, 2014 - 3:04 am
MODBUS over ethernet connection between yokogawa DCS and abb rtu anr96 has a communication error after several minutes.

Topic: Power generation equipment control.
from the Forum department...
Increase in GT hydralic oil filter DP
Originally posted by UPK on 16 October, 2012 - 12:54 am
Raise in hydraulic oil filter DP and allowable limit for filter dust in GT lube oil.
New Replies:
hi, I can't understand why the increase in dp at filter depending the check valve near the...
Topic: Power generation equipment control.
from the Power generation department...
Generator and Capacitor Bank
Posted by fluidflow on 22 July, 2014 - 1:04 am
Totally stumped by the recent brawl over utility of capacitor bank in power generation.
Topic: Communications systems and equipment.
from the Forum department...
S7-1500 CM541 Serial RS232 ASCII help
Posted by Suraj on 21 July, 2014 - 11:00 pm
Point to point Serial RS232 ASCII communication in TIAV13
Originally posted by kiran on 14 July, 2014 - 9:23 pm
Frequently losing suction by pumps and pump discharge flow switch failing.
New Replies:
Strainer choking in the sump: Your water should not be dirty enough to clog that strainer except...
Topic: Motion control, servos, steppers, etc.
from the Forum department...
Field-bus Actuator Recommendation
Originally posted by Carlos Loureiro on 14 July, 2014 - 10:07 am
Looking for recommendations for a Field-bus Actuator
New Replies:
Anyone have any suggestions? ...
Topic: Power generation equipment control.
from the Maintenance department...
Governor Control
Originally posted by Scott_F on 30 April, 2006 - 8:22 am
Definition of Droop and Isoch
New Replies:
arun, Okay, .... Under your scenario with three gen-sets operating in parallel, one in Isoch...

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