Posts from...
Today, Tuesday, May 21, 2013
Posted by Akhtar on 21 May, 2013 - 8:17 am
If the water injection pump trips, what will happen to GT exhaust temperature?
Topic: Power generation equipment control.
from the Maintenance department...
Frame 6B Lube Oil Heaters
Posted by davidmcc on 21 May, 2013 - 3:52 am
Where are the lube oil heaters located?
Topic: Power generation equipment control.
from the Engineering department...
Mark V Power Supplies
Originally posted by DavidMcC on 6 May, 2013 - 1:06 am
how to configure PD for AC power input?
New Replies:
Hi CSA, Sorry to just get back to you now, your answer is spot on, we don't have a DACA so we...
Topic: Software, including programming, OS issues, etc.
from the Instrumentation department...
AS160OS (Fix32) Configuration Problem
Originally posted by Sukhdev Singh on 17 May, 2013 - 9:06 am
ABB "OS Loader" Configuration Problem
New Replies:
Sounds like you have faulty installation disks. You could be completely out of luck here unless...
Topic: Power generation equipment control.
from the Forum department...
Frame 6B Exhausrt Temperature Spreads
Originally posted by James Murray on 14 January, 2013 - 7:53 pm
FR6B tripping on Exhaust Temp spreads at FSNL
New Replies:
We had sort of the same problem once. We had lost the diffuser off our compressor bleed valve...
Topic: Power generation equipment control.
from the Operation department...
Compressor fouling
Posted by Fai on 20 May, 2013 - 9:31 pm
CPD reduced CTDA remain at low temperature. Baseload was reducing as well
Originally posted by Nsikan Williams on 20 May, 2013 - 4:27 pm
just inherited a new plant without adequate handover documentation. just need some info guys.
New Replies:
Dear Nsikan, For my site (frame 9FA), GE setpoint for inlet air filter dp alarm are 4inch H20...
Topic: Power generation equipment control.
from the Forum department...
servo valve calibration
Originally posted by ESKAY on 19 May, 2013 - 4:16 pm
Distillate fuel servo calibration
New Replies:
ESKAY, I thought we'd been over this before.... http://www.control.com/thread/1336557419 ...
ESKAY, This idea of "calibrating servo-operated devices" on GE-design heavy duty gas...
It's difficult I know, really the only way to check is do a "dummy fire" with no spark...
Topic: Software, including programming, OS issues, etc.
from the Software department...
Modbus data swapping issue
Originally posted by Anshuman on 20 May, 2013 - 12:18 am
Data is swapped when same ID, function code and no of registers are polled.
New Replies:
By Lynn August Linse on 20 May, 2013 - 1:38 pm -
This is a common issue in "packet switched" radio systems, because the radios do retries...
It sounds like you have a synchronization issue, which can occur if you have a "dead"...
Hello, Yes, this is a known issue with MODBUS. I had a slave device once that on occasion...
Topic: PLCs and related questions.
from the Automation department...
GE 90-30 series COMM_REQ slowing down data usage
Originally posted by Suraj Shetty on 19 May, 2013 - 1:06 pm
Slow down communication between GE 90-30PLC which are using COMM_REQ SRTP channel commands. and these are communicating over ethernet through cellular modems. the data plan on the cellular modem has a limit of 5GB only.
New Replies:
There is more information on this here: http://www.plctalk.net/qanda/showthread.php?t=79691 (Be...
Maybe a counter in the sending rung so it sends every other scan or less. I could be way off I...
Originally posted by Ben on 16 May, 2013 - 5:32 pm
Several steps of external resistance used for speed control on motor appear to have uneven amounts of resistance. Is this possible? What will the effect on the motor be?
New Replies:
Ben, using the procedure I suggested illustrates how the number of speed-torque curve increments...
Phil, Again appreciate your valued comments. It's people like yourself that keep the world...
Ben... this sort of problem can be solved using Symmetrical Components Analysis! Say the...
Phil, Really appreciate your response. Unfortunately all i've got is a really poor wiring /...
Originally posted by Anonymous on 3 December, 2005 - 6:29 pm
what kind of electrical CAD software is most used by you guys?
New Replies:
I agree that CADS Planner Electric is smart choice for electrical and automation design. it also...
Topic: Power generation equipment control.
from the Instrumentation department...
Ratchet problem
Originally posted by vijay on 19 May, 2013 - 10:40 am
we had a problem in the ratchet mechanism
New Replies:
By Venkatachalam, Valliappan X on 20 May, 2013 - 12:11 am -
In my experience, we faced similar problem in one of the turbines where the ratcheting was...
Topic: Communications systems and equipment.
from the Forum department...
Polling a Modbus Slave
Originally posted by JBB on 19 May, 2013 - 1:42 pm
Setting up communication for Modbus Polling
New Replies:
By William \(Bill\) L Mostia Jr PE on 19 May, 2013 - 9:30 pm -
What error did you get? William (Bill) L. Mostia, Jr. PE Fellow SIS-TECH Solutions, LP Any...
Sounds like either your master or your slave doesn't want to return more than 50 registers at a...
Topic: Software, including programming, OS issues, etc.
from the ENG department...
COM PORT IN LINUX
Originally posted by SARAVANAN on 23 January, 2011 - 11:21 am
linux base com port communication
New Replies:
I just added TCP/IP capability and put it on a new web page: http://www.ctrlterm.com/ ...
Topic: Power generation equipment control.
from the Operations department...
Loss of MW's after outage
Originally posted by MD on 19 May, 2013 - 4:52 pm
Loss of MW's coming out CI
New Replies:
1) What do you mean by "loss of air flow", can you explain more? 2) Do you have data...
Topic: Power generation equipment control.
from the operation department...
hydraulic filter
Originally posted by P.P.Salim on 18 May, 2013 - 4:01 am
How to change over Hydraulic oil filter in frame6B GE gas turbine, while the Gas turbine is in service.
New Replies:
Bob Johnston, I have seen some non-GE packaged units which did not have transfer fill valves,...
Check your P & ID for details. 1)open the fill valve and allow stand-by filter to be full...
Topic: Power generation equipment control.
from the control department...
GT FSR for warm up the turbine
Originally posted by Ahmed on 31 January, 2013 - 12:32 pm
FSR fuel reference - margin of FSR warm up
New Replies:
MWO, I don't have a copy of Toolbox or a .m6b file for a gas turbine to review. To be specific,...
Unfortunately the next opportunity will be in a year so I am trying to compile notes and make a...
MWO, Certainly a diesel starting means which is not being controlled correctly could be the cause...
CSA, I appreciate the reply. There is a general feeling among the operators and mechanical...
MWO, There are a couple of different versions of FSRMIN and the "programming" used to...
Topic: Continuous process industries, DCS questions.
from the Design department...
RS232C to MODBUS Interface
Originally posted by Anand on 18 May, 2013 - 3:44 pm
Request for help related to appropriate hardware-software interface
New Replies:
It isn't a Modbus master you're looking for, it's some other set of functions relating to what...
You need to provide a couple more bits of information to clarify. RS232 and Modbus aren't mutually...
Topic: PLCs and related questions.
from the serious department...
Mark VI - VCMI Board Replacement
Originally posted by Fausto on 23 February, 2010 - 9:59 am
Mark VI not working with a VCMI board replacement!!
New Replies:
Salem have acknowledged problems with IS215VCMIH#B and H#C. The issue is with socketed IONET...
Topic: PLCs and related questions.
from the Forum department...
Communications between Quantum PLCs
Originally posted by tania on 16 May, 2013 - 8:06 pm
Quantum PLC Communications
New Replies:
With 2 quantums you map index will be 0. its like an offset setting. your slot ID will be 254 if...
Originally posted by Fyzal on 16 May, 2013 - 6:53 am
Low output after smoke coming out from the extraction pipe from bearing #2
New Replies:
Fyzal, Lube oil header temperature is quite higher, I think that it should be in 50~55C, try to...
Fyzal, If this is a problem with some kind of L.O. leak in the #2 Brg. area (which is what I...
At the moment, we are planning to check the extraction pipes for the sealing air, which taken...
Hi CSA, Smoke is seen from the venting pipe since from Full Speed no load, and getting worse...
Dear SB, The lube oil pressure is 1.85 bar, and temperature (LTTH-1) is 66.6dgC. At bearing #2,...
Topic: PLCs and related questions.
from the Forum department...
Why 250mA fuse for 4-20mA analog input?
Originally posted by Mohamad Ashour on 9 May, 2013 - 5:31 pm
Why 250mA fuse for 4-20mA analog input?
New Replies:
25V / 250 ohms = 100 mA, so a 250 mA fuse is not going to do this job - 50 mA might....
I suspect that a fuse installed in a 4-20mA loop is an attempt to protect an analog input on a 2...
No I am sure it is 250mA fuse for each 4-20mA input and not the 250ohm resistor....
I am sure it is 250mA for each 4-20mA input. ...
Topic: Motion control, servos, steppers, etc.
from the mechanical design department...
control of servovalve
Posted by george on 18 May, 2013 - 3:26 pm
synchronization of 2 servo valves that control 2 cylinders
Topic: Power generation equipment control.
from the Operations Department department...
Mark VI IONet N-Tron Network switch failures
Originally posted by D.V on 2 November, 2011 - 6:24 am
Mark VI IONet N-Tron Network switches keep on failing, RCA needed
New Replies:
Sagir, Is it possible that the Rev. C switch failures have caused some problem(s) with the 28 VDC...
We too are facing a lot of failures in N-tron switches (516/508 Fx and tx). After an RCA by N-tron,...
Topic: PLCs and related questions.
from the Instrumentation department...
gefanuc 9030 modules
Originally posted by amirqadri on 17 May, 2013 - 2:22 pm
IC693MDL module not giving output after programming.
New Replies:
Output modules are typically powered with an 'outside' source independent of the PLC. If the output...
Topic: Continuous process industries, DCS questions.
from the Research department...
Help with Modbus Hold and Store
Posted by ME on 17 May, 2013 - 11:17 am
A solution to read, hold and store the modbus datas.
Topic: Power generation equipment control.
from the Instrumentation department...
CEMS In-situ analyser
Originally posted by J. Bhattacharya on 14 May, 2013 - 8:24 am
Problems with in-situ CEMS analysers
New Replies:
What is the make of CEMS. I had faced the same problem and we have shifted the analyser at 16 mtr....
Topic: Power generation equipment control.
from the Shree Mega Power department...
Medium Voltage Drive
Posted by Sachin Mewara on 17 May, 2013 - 2:40 am
To run the MVDs on 40 Deg C ambient temprture.
Posted by Jhon on 17 May, 2013 - 2:00 am
What is the critical speed of Centaur 40?

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