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Today, Monday, May 20, 2013
Originally posted by Suraj Shetty
on 19 May, 2013 - 1:06 pm
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.
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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...
Data is swapped when same ID, function code and no of registers are polled.
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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...
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?
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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 /...
Ben... please provide operating data:
a) Line-currents.
b) Supply phase-phase voltages.
c)...
Originally posted by ESKAY on 19 May, 2013 - 4:16 pm
on 19 May, 2013 - 4:16 pm Distillate fuel servo calibration
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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...
what kind of electrical CAD software is most used by you guys?
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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...
we had a problem in the ratchet mechanism
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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...
Originally posted by JBB on 19 May, 2013 - 1:42 pm
on 19 May, 2013 - 1:42 pm Setting up communication for Modbus Polling
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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...
Originally posted by SARAVANAN on 23 January, 2011 - 11:21 am
on 23 January, 2011 - 11:21 am linux base com port communication
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I just added TCP/IP capability and put it on a new web page:
http://www.ctrlterm.com/
...
Loss of MW's coming out CI
New Replies:
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...
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,...
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...
Originally posted by Ahmed on 31 January, 2013 - 12:32 pm
on 31 January, 2013 - 12:32 pm FSR fuel reference - margin of FSR warm up
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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...
Request for help related to appropriate hardware-software interface
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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...
Mark VI not working with a VCMI board replacement!!
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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...
Quantum PLC Communications
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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...
Originally posted by Fyzal on 16 May, 2013 - 6:53 am
on 16 May, 2013 - 6:53 am Low output after smoke coming out from the extraction pipe from bearing #2
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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,...
Fyzal,
If I recall correctly some Frame 9E machines also had a strainer/separator underneath the...
Fyzal,
How long was "smoke" seen coming from the vent pipe?
Is there any idea how...
Originally posted by Mohamad Ashour on 9 May, 2013 - 5:31 pm
on 9 May, 2013 - 5:31 pm Why 250mA fuse for 4-20mA analog input?
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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.
...
synchronization of 2 servo valves that control 2 cylinders
Mark VI IONet N-Tron Network switches keep on failing, RCA needed
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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,...
IC693MDL module not giving output after programming.
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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...
Posted by ME on 17 May, 2013 - 11:17 am
on 17 May, 2013 - 11:17 am A solution to read, hold and store the modbus datas.
ABB "OS Loader" Configuration Problem
Problems with in-situ CEMS analysers
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What is the make of CEMS. I had faced the same problem and we have shifted the analyser at 16 mtr....
To run the MVDs on 40 Deg C ambient temprture.
What is the critical speed of Centaur 40?
Originally posted by Ann Roberts on 14 May, 2009 - 3:33 pm
on 14 May, 2009 - 3:33 pm Serial interface between Allen Bradley's Control Logix and Emerson Ovation DCS
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By Pons Tanawan on 17 May, 2013 - 1:46 am -
Ann, how about the Nexus1250 its provided with RS485 communication port that could support A...
Very confused about the operation of minimum FSR/Acceleration Control and their constants. (probably too many questions on one posting)
New to Modbus, trying setup communication between two devices.
Woodward 505 steam controller Alarm issue
Posted by Michael Lancina on 16 May, 2013 - 3:02 pm
on 16 May, 2013 - 3:02 pm FactoryLink 7.2 Runtime OPC Server will not recognize new/modified tags
When is the point when I connect the liquid level control?
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By Walt Boyes on 16 May, 2013 - 12:24 pm -
I don't know. You don't say whether your VFD has such control inputs and outputs. If it does not,...
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