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Control.com topic...
Applications
Originally posted by masoud on 1 August, 2012 - 10:01 am
problem with Shield current of a 63Kv line (single core)
New Replies:
Masoud... 12) Is the ratio of Line-current to Shield-current always the same? Phil...
> My first question is how did you measure it? the current was measured by a clamp ammeter...
My first question is how did you measure it? It seems likely that this much current on a shield...
Originally posted by Michael Venegas on 30 July, 2012 - 12:51 pm
I'm developing a ModbusRTU Master Over TCP/IP Interface to read a ModbusRTU electricity meters data. the meters are working over RS485 network.
New Replies:
You can try xMasterSlave for Modbus protocol at www.tgscada.com. It is a completely freeware....
Topic: Human-Machine Interface and SCADA.
from the Forum department...
Wonderware logger alarm group errors
Posted by Pat Gigaroa on 25 July, 2012 - 9:27 pm
Added new alarm group in WW Error in logger.
Topic: Engineering and workplace issues.
from the too formal department...
kva & hp
Originally posted by engineer on 18 July, 2012 - 12:19 pm
maximum hp motor for dol starting with given kva transformer
New Replies:
Engineer... I committed three (3) 'OOPs' (the most feared word in an operating-room): OOPs 1) I...
Engineer... since the V-Drop experienced by the motor is proportional to the load carried by the...
dear phil corso and william hinton, thanks the basic idea i started out with is, the maximum hp...
William... I meant NEMA Locked-Rotor Code. Phil...
William... I would be very interested in the motor's kVA/Hp ratio? Regards, Phil...
As you did not specify a transformer type, voltage class, kVA or hp, I will give you an example: ...
Topic: PLCs and related questions.
from the Automation List department...
Unity vs. Concept
Originally posted by Cole on 10 March, 2007 - 1:27 pm
What is difference between Unity and Concept programming?
New Replies:
> Unity is new era at Schneider, you can use Premium and Quantum Families as well, but not...
Topic: Engineering and workplace issues.
from the Engineering department...
Airfield Lighting Circuit
Originally posted by HV on 19 July, 2012 - 6:05 pm
Airfield lighting circuit connections
New Replies:
Lamps in the series circuit must be controlled in certain bright settings. This is done through...
HV... they are series-connected to provide consistent lighting patterns. Series lighting insures...
Topic: Engineering and workplace issues.
from the INSTRUMENTATION department...
Difference between 316H and 316L material
Originally posted by Mohsin on 19 July, 2012 - 5:49 am
what is difference between 316H and 316L SS material? we are using 316L ss material impulse lines for Low pressure instruments and 316H SS material impulse line for high pressure impulse lines.
New Replies:
the -H, -L refer to carbon content only ...
Topic: Continuous process industries, DCS questions.
from the High level control software department...
High level control platforms (WinPC server based) that can do PID and MPC?
Posted by JoeClinker on 20 July, 2012 - 5:24 am
I am looking for a "best of breed" PC-based High Level/Advanced Control software platform that combines:

1) Basic and advanced PID function blocks
2) MPC capability
Topic: Application Questions and Problems
from the Testing Department department...
underfrequency test for Micom P643
Originally posted by William Nuevo on 19 July, 2012 - 3:51 am
This is just a query for other procedures for under-frequency relay time test.
New Replies:
William... see Eng-Tips, Thread # 238-307149, for a similar question on the MICOm P643! Regards,...
Topic: Continuous process industries, DCS questions.
from the Forum department...
Valve Controller & Positioner
Originally posted by Fuad on 16 July, 2012 - 7:10 am
Difference between A valve positioner and controller
New Replies:
The way it works is that you will have say a pressure transmitter in the field somewhere measuring...
Topic: Engineering and workplace issues.
from the commissioning department...
electrostatic treater interfce level control
Originally posted by roberto arciniega on 12 April, 2012 - 8:06 am
We have a Ktek Capacitance type level transmitter to measure the interface and it is part of a LIC and LCV. We have checked the calibration and it is ok. In a current normal operation crude is flowing along with the water on the water line.
New Replies:
We have had similar problems and we have finally come to the conclusion that the only proper I/F...
Topic: Power generation equipment control.
from the Automation List department...
What makes a generator increase load
Originally posted by kumarash on 10 August, 2008 - 3:49 pm
What makes a generator coupled to a gas turbine increase load when load raise command is issued to Mark V
New Replies:
The question is not clear, and the abbreviations are unclear, as well. I'm pretty sure 'GG'...
Could you define Mload and GG...
Hi. Who knows the Dynamic relation between Mload and output power of LP turbine? How are they...
Topic: Local and wide area networking in factory automation.
from the Control system department...
NAMUR - Maximum distance
Posted by sun on 16 July, 2012 - 5:22 am
NAMUR - Maximum distance and signal amplifier
Topic: Local and wide area networking in factory automation.
from the Plant Engineering department...
DCS Control bus network
Originally posted by Mohamed on 12 July, 2012 - 6:36 am
Probability of Redundant ring network for DCS systems to be explored in view of chances control failure if go with Tree/Mesh/star topology.
New Replies:
Thank you Mr. Dick Caro, For the update....
Actually, one of the very early DCS from Leeds and Northrop, the MAX 1, used a dual path...
Topic: Engineering and workplace issues.
from the EE department...
120/208V or 277/480V.... huh?
Originally posted by Anonymous on 25 September, 2003 - 1:11 pm
what does it mean when something is rated 120/208V or 277/480V? What do the two numbers mean?
New Replies:
> Only have 125 coming from one wire in electrical panel. Other wire is dead. > Tried to...
Topic: Power generation equipment control.
from the Power Generation department...
Drum Level transmitter
Originally posted by Anonymous on 18 November, 2006 - 2:38 pm
Can you tell me the basic concept for drum level mesurement.
New Replies:
By K V S Viswanatha Ram on 10 July, 2012 - 3:41 am -
> u always talk about steam getting condensed inside the condensate pot. why not the other way?...
Topic: Application Questions and Problems
from the Temperature department...
RTD temperature measurement
Originally posted by Kirill St. on 9 July, 2012 - 3:14 am
connection of RTD chip to tube.


New Replies:
There are commercially available thermally conductive epoxies (google will find them) Although I...
Topic: Sensor technologies.
from the mesurement and control department...
Thermocouples.
Originally posted by a s reddy on 7 July, 2012 - 2:41 am
extension leads of Thermocouples.
New Replies:
The whole point of using thermocouple extension wire is to bring the "cold" junction back...
Type K extension cables are not equivalent to Type K t/c wires, but is much cheaper. The use of the...
Just to clarify, a Type K thermocouple does NOT use copper wire as extension cable. Even a Type...
It's to avoid creating another junction of dissimilar metals and distorting the temperature...
Topic: Application Questions and Problems
from the Automation List department...
HIMA ELOP II v 3.5 application
Originally posted by Sergei on 4 April, 2007 - 11:35 pm
Failed to start ELOP II application in Windows XP environment.
New Replies:
We have Elop II in windows 2000 sp4. Some times program closed suddenly and before that this error...
Topic: Application Questions and Problems
from the Forum department...
Fire detection suppression system
Originally posted by a s reddy on 7 July, 2012 - 2:29 am
plc based CO2 Flooding system based on addressable Smoke/Fire and Break glass
New Replies:
Hello, http://www.firebussystems.com/ This company supports several PLCs. Good luck, ...
Topic: Human-Machine Interface and SCADA.
from the Forum department...
Elau B-1 display for Illig Machine
Originally posted by Stan on 14 May, 2012 - 5:22 pm
help installing program for Elau B-1 display
New Replies:
I have Elau display for Illig machine. I have problem in data transmission. in some pages it...
Originally posted by Ayman on 23 June, 2012 - 12:15 pm
What is the cause of the Alarm Trip mult. activ. too long or too often?
New Replies:
There are a fair number of tech notes that AB has hidden away too. It seems like some of them the...
Originally posted by Jessica on 28 June, 2012 - 10:51 am
LVDTs are used in a wide variety of applications, do you think which application are most common of using LVDT sensors?
New Replies:
Jessica, Your own company's website (www.itargetsensors.com) lists a lot of uses for LVDTs, many...
> Turbine Valve control Thanks! How about hydraulic cylinder? ...
Topic: Engineering and workplace issues.
from the Forum department...
RS485 shield termination
Originally posted by jake on 4 July, 2012 - 6:41 am
What is the proper method in how to terminate the shield cable of an rs 485 cable?
New Replies:
From National's AN-1057 note on RS-485 https://www.national.com/an/AN/AN-1057.pdf Generally, a...
Topic: Power generation equipment control.
from the Controls department...
Mark-VI DCOM error
Originally posted by srh on 28 June, 2012 - 3:18 am
Mark-VI Station freezing up
New Replies:
Have you used the DCOM document that Wassim Daoud provided the URL for? It most likely could be...
Topic: Power generation equipment control.
from the Controls department...
Alarm Segregation ABB AC 800F
Posted by srh on 4 July, 2012 - 2:37 am
Alarm segregation in ABB AC800F
Topic: PLCs and related questions.
from the Automation List department...
Walkie talkie near PLC
Originally posted by rajesh kunhi kambrath on 18 January, 2001 - 11:34 am
can the signal from a walkie talkie radio erase the contents in a PLC processor if we operate the same near by.
New Replies:
Regarding Walkie talkie near PLC issues, tests attempting to reproduce source, path, and...
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