Posts from...Today, Tuesday, May 21, 2013
from the Forum department...Effect of Water Injection on GT exhaust Temp
If the water injection pump trips, what will happen to GT exhaust temperature?
from the Maintenance department...Frame 6B Lube Oil Heaters
Where are the lube oil heaters located?
from the Engineering department...Mark V Power Supplies
how to configure PD for AC power input?
Hi CSA, Sorry to just get back to you now, your answer is spot on, we don't have a DACA so we...
from the Instrumentation department...AS160OS (Fix32) Configuration Problem
ABB "OS Loader" Configuration Problem
By Rob on 21 May, 2013 - 1:16 am -
Sounds like you have faulty installation disks. You could be completely out of luck here unless...
from the Forum department...Frame 6B Exhausrt Temperature Spreads
FR6B tripping on Exhaust Temp spreads at FSNL
By MWO on 20 May, 2013 - 10:15 pm -
We had sort of the same problem once. We had lost the diffuser off our compressor bleed valve...
from the Operation department...Compressor fouling
CPD reduced CTDA remain at low temperature. Baseload was reducing as well
from the Forum department...what is the inlet air filter high dp trip set point for GE frame 9?
just inherited a new plant without adequate handover documentation. just need some info guys.
Dear Nsikan, For my site (frame 9FA), GE setpoint for inlet air filter dp alarm are 4inch H20...
from the Forum department...servo valve calibration
Distillate fuel servo calibration
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...
By Bob Johnston on 19 May, 2013 - 7:09 pm -
It's difficult I know, really the only way to check is do a "dummy fire" with no spark...
from the Software department...Modbus data swapping issue
Data is swapped when same ID, function code and no of registers are polled.
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...
By Darrin on 20 May, 2013 - 9:34 am -
It sounds like you have a synchronization issue, which can occur if you have a "dead"...
By Mark on 20 May, 2013 - 8:53 am -
Hello, Yes, this is a known issue with MODBUS. I had a slave device once that on occasion...
from the Automation department...GE 90-30 series COMM_REQ slowing down data usage
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.
By Russ B on 20 May, 2013 - 9:59 am -
There is more information on this here: http://www.plctalk.net/qanda/showthread.php?t=79691 (Be...
By Curt Wuollet on 19 May, 2013 - 11:42 pm -
Maybe a counter in the sending rung so it sends every other scan or less. I could be way off I...
from the Electrical department...Unbalanced external resistance on wound rotor induction motor
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?
Ben, using the procedure I suggested illustrates how the number of speed-torque curve increments...
By Ben on 18 May, 2013 - 5:30 pm -
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...
By Ben on 17 May, 2013 - 6:16 pm -
Phil, Really appreciate your response. Unfortunately all i've got is a really poor wiring /...
from the dengs department...What kind of electrical CAD software is most used?
what kind of electrical CAD software is most used by you guys?
By KMy on 20 May, 2013 - 6:00 am -
I agree that CADS Planner Electric is smart choice for electrical and automation design. it also...
from the Instrumentation department...Ratchet problem
we had a problem in the ratchet mechanism
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...
from the Forum department...Polling a Modbus Slave
Setting up communication for Modbus Polling
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...
By Steve Myres on 19 May, 2013 - 7:00 pm -
Sounds like either your master or your slave doesn't want to return more than 50 registers at a...
from the ENG department...COM PORT IN LINUX
linux base com port communication
I just added TCP/IP capability and put it on a new web page: http://www.ctrlterm.com/ ...
from the Operations department...Loss of MW's after outage
Loss of MW's coming out CI
By Bob Johnston on 19 May, 2013 - 7:03 pm -
1) What do you mean by "loss of air flow", can you explain more? 2) Do you have data...
from the operation department...hydraulic filter
How to change over Hydraulic oil filter in frame6B GE gas turbine, while the Gas turbine is in service.
Bob Johnston, I have seen some non-GE packaged units which did not have transfer fill valves,...
By Bob Johnston on 18 May, 2013 - 9:53 pm -
Check your P & ID for details. 1)open the fill valve and allow stand-by filter to be full...
from the control department...GT FSR for warm up the turbine
FSR fuel reference - margin of FSR warm up
MWO, I don't have a copy of Toolbox or a .m6b file for a gas turbine to review. To be specific,...
By MWO on 19 May, 2013 - 8:46 am -
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...
By MWO on 17 May, 2013 - 1:55 pm -
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...
from the Design department...RS232C to MODBUS Interface
Request for help related to appropriate hardware-software interface
It isn't a Modbus master you're looking for, it's some other set of functions relating to what...
By Steve Myres on 19 May, 2013 - 1:48 pm -
You need to provide a couple more bits of information to clarify. RS232 and Modbus aren't mutually...
from the serious department...Mark VI - VCMI Board Replacement
Mark VI not working with a VCMI board replacement!!
By Lionel on 19 May, 2013 - 12:37 pm -
Salem have acknowledged problems with IS215VCMIH#B and H#C. The issue is with socketed IONET...
from the Forum department...Communications between Quantum PLCs
Quantum PLC Communications
By Brendonh on 19 May, 2013 - 7:43 am -
With 2 quantums you map index will be 0. its like an offset setting. your slot ID will be 254 if...
from the Engineering department...Low Output After Bearing #2 had smoke on GE MS9001E.
Low output after smoke coming out from the extraction pipe from bearing #2
By SB on 19 May, 2013 - 3:43 am -
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,...
from the Forum department...Why 250mA fuse for 4-20mA analog input?
Why 250mA fuse for 4-20mA analog input?
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. ...
from the mechanical design department...control of servovalve
synchronization of 2 servo valves that control 2 cylinders
from the Operations Department department...Mark VI IONet N-Tron Network switch failures
Mark VI IONet N-Tron Network switches keep on failing, RCA needed
Sagir, Is it possible that the Rev. C switch failures have caused some problem(s) with the 28 VDC...
By Sagir on 17 May, 2013 - 12:59 pm -
We too are facing a lot of failures in N-tron switches (516/508 Fx and tx). After an RCA by N-tron,...
from the Instrumentation department...gefanuc 9030 modules
IC693MDL module not giving output after programming.
By Russ B on 17 May, 2013 - 4:17 pm -
Output modules are typically powered with an 'outside' source independent of the PLC. If the output...
from the Research department...Help with Modbus Hold and Store
A solution to read, hold and store the modbus datas.
from the Instrumentation department...CEMS In-situ analyser
Problems with in-situ CEMS analysers
What is the make of CEMS. I had faced the same problem and we have shifted the analyser at 16 mtr....
from the Shree Mega Power department...Medium Voltage Drive
To run the MVDs on 40 Deg C ambient temprture.
from the Private department...What is the critical speed of Centaur 40 family?
What is the critical speed of Centaur 40?
Quick, sing me the BUDAPEST NATIONAL ANTHEM!!
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