Posts from...
Today, Wednesday, July 23, 2014
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 Maintenance department...
Problems with air intake and dirty turbine
Posted by Arianna Mambrini on 23 July, 2014 - 4:30 am
Air intake filters clean but turbine dirty
Topic: Sensor technologies.
from the Control Systems department...
1oo2 voting for temperature transmitter
Posted by christine on 23 July, 2014 - 4:30 am
1oo2 voting for temperature transmitter
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: 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:
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...
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...
Neo, Already i checked the diesel engine loaded speed which was 2320 rpm and replace the torque...
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...
Something to take into consideration is that the pressure at the bottom of a column of liquid will...
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:
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...
Neo, What the heck is a "DEH"?...
Wow, i think it is a good question, and i am also interested. In DEH, we just increase speed...
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:
CSA: It seems that it is hard for a field engineer to enjoy a "trip",and i feel that...
Neo, Whenever a field engineer says he or she is going on a "trip of a lifetime" it...
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....
SB, The section you provided seems to be from a very early Mark IV Control Specification. The...
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...
Topic: Power generation equipment control.
from the serious department...
charge accumulator
Originally posted by Kene on 23 October, 2011 - 1:17 pm
charge accumulator method
New Replies:
I am not familiar with GT's hydraulicss. I can comment on ST's which should have similar design...
MJ, You should be able to find the pressure listed on the Device Summary for the machine. The...
Can anybody tell me what should be the nitrogen Pressure in Accumulator for Frame-6 machine. we...
Topic: PLCs and related questions.
from the industrial department...
GE Fanuc rx7i PLC Not Going into Run Mode
Posted by majji raju on 21 July, 2014 - 1:27 am
PLC goes into halt mode after detecting 'CONTROLLER CPU HARDWARE FAILURE' fault
Originally posted by bammaroc on 18 July, 2014 - 1:45 pm
communication between DCS CS 3000 and Allen Bradley platform FlexLogix 5434 using Modbus protocol
New Replies:
Hi Ikhtiander, thank you for your reply, and I apologize for the inconvenience. frankly, I...
Topic: Power generation equipment control.
from the Forum department...
Gas Turbine Negative Lean Lean Mode
Posted by moiz on 20 July, 2014 - 8:52 am
Want to know about negative lean lean mode of gas turbine
Topic: Application Questions and Problems
from the Instrument department...
Adding Process values in Centum CS3000
Originally posted by zeshan ahmed on 30 March, 2014 - 12:56 pm
Tag not found error when adding process values to fcs from cs3000 yokogawa.
New Replies:
sir, kindly explain me about station to station data link transfer..... plzzzzzzzzz sir ...
Topic: Power generation equipment control.
from the Private department...
Field Balancing
Originally posted by Jhon on 16 July, 2014 - 2:03 am
High vibration problem on a two shaft gas turbine. Need help on Field Balancing.
New Replies:
Hi; I want to know after 4 run method we got a weight and angle. But the experts says that the...
Topic: Engineering and workplace issues.
from the Forum department...
Maximun Shutoff Differential in a valve
Originally posted by Biju on 31 May, 2011 - 3:59 am
Significance of Maximum Delta P shut off for valves
New Replies:
Hi all > However, actuator will be designed for 5 barg. This means valve will not >...
It's absolutely true. Best thing to design the Shutdown valve actuator for shut-off pressure as...
Topic: Engineering and workplace issues.
from the Engineering department...
Flange Adaptor and Isolation for Press Transmitter
Posted by Josh on 19 July, 2014 - 11:45 pm
Mismatching flange between tank nozzle and transmitter
Topic: Engineering and workplace issues.
from the Forum department...
Dew Point temperature of Natural Gas
Originally posted by Lucky on 11 July, 2014 - 2:49 am
How to calculate the dew point temperature of the Natural Gas?
New Replies:
Coutesy of CSA: "If you have "a recent natural gas analysis report from a reputable...
Hi CSA, I could able to locate the Superheat requirement details document for Natural gas. it...
Topic: PLCs and related questions.
from the Automation List department...
Comparing PLC and DCS
Originally posted by Anonymous on 6 May, 2004 - 6:34 pm
I am new in the field of automation. Could anybody tell me the difference between PLC and DCS other than I/O handling capacity?
New Replies:
Dear Raza, Can you provide some Input on cost comparison of PLC & DCS. ...

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