Posts from...Today, Wednesday, May 22, 2013
from the interposing relay department...interposing relay
what is interposing relay
By Steve Myres on 22 May, 2013 - 12:36 pm -
The phrase "interposing relay" is describing the relay by it's purpose in the system...
Is there a difference between an interposing relay and say an "ice cube" relay? I'm...
from the Maintenance department...Frame 6B Lube Oil Heaters
Where are the lube oil heaters located?
Davidmcc, Good to hear you have located the heaters. Sounds like a very circuitous route--and...
The heaters pull out from the opposite side of the machine from where the terminals are. The...
By davidmcc on 22 May, 2013 - 5:19 am -
Thanks CSA, you're right, the lube oil heater 23QT-1 is accessible at low level on the side of...
By turbinectech on 21 May, 2013 - 1:50 pm -
Our three are on the right side of the oil tank. There is a TIL on these, talks about reconfiguring...
Davidmcc, Typically, the immersion heaters used on GE-design heavy duty gas turbines are in...
from the Forum department...Mobus slave Address
About modbus protocol
By Lynn August Linse on 22 May, 2013 - 9:40 am -
Most slave and master devices support all addresses from 1 to 255, in part because many were...
I don't know what 248 to 255 are used for. They're not used because that's what the Modbus spec...
from the Operations department...Frame 6, Mark V GT
We are running Frame 6, Mark V GT ,only with gas.Has HRSG. GT for captive power generation in process plant steam for process
from the I&C department...GE Fanuc PLC Alarm
Action handler Fault from GE Fanuc PLC
from the Maintenance department...LIquid Fuel Bypass Valve Mark V Flame 5 (MS5001)
Load running at limitation when running on fuel oil.
STEVEN, I don't know of any way to test for passing of the liquid fuel bypass valve when the...
from the instrumentation department...servo regulator
What is meant integrator convergence gain for servo regulator?
from the Automation List department...MODBUS /TCP and GPRS firewall/NAT
developing a telemetry system (RTU) based on a cellular modem with build-in GPRS TCP/IP...
I am also trying to do the similar project but in my case the RTU is a controller with GSM/GPRS...
from the For a book department...PLC's with free programming software?
Looking for PLC's that can be programmed in Ladder, FBD and Structured text, preferably with free, or low cost programming software.
By brucewayne on 21 May, 2013 - 9:48 pm -
micrologix 1100 has free lite version software...
from the Forum department...servo valve calibration
Distillate fuel servo calibration
Dear CSA , Thanks for directing me to the old thread , for the same issue of calibrating...
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 Instrumentation department...Ratchet problem
we had a problem in the ratchet mechanism
By STEVEN on 21 May, 2013 - 12:37 pm -
Experience ratchet pump both AC and DC pump cut-in during ratcheting operation. Found motor pump...
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 OPD Data Acquisition and Reporting department...Release of Genesis 1.2, OPC Data Acq Freeware
Genesis 1.2 is the last release of a freeware used for OPC data acquisition, data saving (as csv) and data charting.
Genesis OPC Explorer 2.0 is a Free OPC Client for connection to OPC Servers, data acquisition, data...
from the Forum department...Polling a Modbus Slave
Setting up communication for Modbus Polling
By Andrzej on 21 May, 2013 - 9:26 am -
Hello, Try use the Modbus Tester from www.modbus.pl to check what errors you have. Regards, ...
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 Forum department...Effect of Water Injection on GT exhaust Temp
If the water injection pump trips, what will happen to GT exhaust temperature?
Akhtar, Water injection definitely has an effect on exhaust temperature, but not as much as some...
from the Forum department...Communicating with Parker SSD drive
My new service laptop doesn't have a serial port and it seems parker doesnt make any cables to talk to their drive that go through USB.
Use a USB to serial adapter. Hook it to the SSD adapter. if you don't have the SSD adapter call...
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 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...
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 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,...
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,...
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...
It's not reality or how you perceive things that's important -- it's
what you're taking for it...