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Today, Saturday, May 18, 2013
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:
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 Mohamad Ashour
on 9 May, 2013 - 5:31 pm
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.
...
Request for help related to appropriate hardware-software interface
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,...
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
New Replies:
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...
By SB on 16 May, 2013 - 11:37 am -
Dear Fayzl
Do mention the Lube oil header pressure and temperature vibration siesmec as well as...
How to change over Hydraulic oil filter in frame6B GE gas turbine, while the Gas turbine is in service.
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,
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...
By MWO on 15 May, 2013 - 10:32 pm -
We installed a Frame 6B GT in 1988 and in 2004 we upgraded our Mark IV to a Mark VI. After that...
IC693MDL module not giving output after programming.
New Replies:
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.
Quantum PLC Communications
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?
New Replies:
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,...
If the pump is centrifugal pump, than stopping it would not stop the flow. You have to close the...
By Dick Caro on 16 May, 2013 - 10:45 am -
You haven't told us much about your objectives or the equipment you are using. This makes it...
Originally posted by tvlas on 6 March, 2013 - 3:28 am
on 6 March, 2013 - 3:28 am Question about how a PID Controller might be implemented in C++. How to go from continuous to discrete signal in C++?
New Replies:
> Here is our implementation for closed loop controllers in C++:
Yeah,I concur that are truly...
What is normal slip frequency for synchronization.
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By MWO on 15 May, 2013 - 9:09 pm -
>1) When synchronizing with high slip, how does this affect breaker contacts?
In AUTO, the...
By paul on 15 May, 2013 - 11:40 am -
Sirs,
I found this topic very interesting and informative, and have a few questions regarding...
Originally posted by edris on 10 May, 2013 - 7:40 pm
on 10 May, 2013 - 7:40 pm Error message when creating a control strategy on a delta v 7.4
New Replies:
By thomajef on 15 May, 2013 - 2:49 pm -
In DeltaV Explorer/Setup/Licenses you should see your Version 7 license from their just drag and...
Originally posted by Sadiq Mohamed on 17 June, 2010 - 7:55 am
on 17 June, 2010 - 7:55 am I want to know the details of a speed control for a BLDC motors. I want to know the relation between the torque variation during speed control.
New Replies:
By George C on 15 May, 2013 - 1:12 pm -
Hello all,
In your situation is very useful to search the information provided by PIC's...
Originally posted by DEWA on 6 May, 2013 - 2:02 am
on 6 May, 2013 - 2:02 am Action handler Fault from GE Fanuc PLC
New Replies:
By Russ B on 15 May, 2013 - 1:07 pm -
> this all the informations i have about this alarm, and i don't find any thing
> in manuals...
Want to calculate the total voltage drop in a 600 meter long cable carrying 150A
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By Gerald Beaudoin on 15 May, 2013 - 12:59 pm -
I agree entirely with the suggestion to use transformers at both ends of the run and use a higher...
Originally posted by Mike Borrelli on 9 May, 2013 - 10:39 am
on 9 May, 2013 - 10:39 am What causes diagnostic "LVDT position diffhigh REG#5"?
New Replies:
I was not aware of this file: HELP_QD.DAT. Thanks for this simple yet huge tip (I've needed for...
wideband vibration alarm...
New Replies:
By Jeff Warner on 15 May, 2013 - 11:25 am -
I assume you have a Bently 86517 accelerometer interface module. If so, Bently manual # 83301-01...
Posted by Scott on 15 May, 2013 - 10:11 am
on 15 May, 2013 - 10:11 am Unable to connect Wonderware Intouch View to A-B CompactLogix 1769-L32E
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