Posts from...
Today, Wednesday, August 27, 2014
Topic: Software, including programming, OS issues, etc.
from the Forum department...
Siemens Procidia upgrade
Originally posted by Bill K on 26 August, 2014 - 11:23 am
update info? Upgrading from Siemens 3.1 to latest version.
New Replies:
> Can anyone give me a ballpark cost on upgrading from siemens 3.1 to the latest version? ...
Topic: Application Questions and Problems
from the Automation List department...
Control Valve Cycle Measurement
Originally posted by Gerald Beaudoin on 20 August, 2014 - 8:04 am
How to measure the control valve cycles?
New Replies:
By Gerald Beaudoin on 27 August, 2014 - 1:43 pm -
Sure would appreciate any points of view on this one..... Cheers Gerald Beaudoin...
Originally posted by Paul Kraemer on 26 August, 2014 - 2:12 pm
Supply and exhaust air handling control method evaluation.
New Replies:
thanks for your response Curt, Do you mean that rather than running my Supply Blowers at fixed...
That differential pressure is the one I would control. Regards cww...
Topic: PLCs and related questions.
from the PLC Control department...
PID Control using FB41 for Siemens S7-300 PLC
Originally posted by Donald Tan on 20 December, 2002 - 11:19 am
I am an undergraduate student who is currently trying to program a Siemens S7-300 PLC (CPU 313) for PID control using FB 41. Where can I find more examples and more details on how to use FB41. There is none inside the Siemens PID control manual for the FB41. What are the important parameters that need to be configured?
New Replies:
By Jan Steen Nielsen on 27 August, 2014 - 12:19 pm -
Hello Amir Ovcina (and others) I have made an all-in-one PID-Controller (FB121) and many other...
Topic: Continuous process industries, DCS questions.
from the Instrumentation and Control department...
Calculating Pressure Transmitter Range
Originally posted by Kamaraj on 21 August, 2014 - 7:42 am
How can we test Rangeability of Pressure Transmitter?
New Replies:
The word 'Turndown' is used in two ways. One use of the word turndown is to define how far a...
Dear Mr.David, In your Last Post you wrote that At 7 bar pressure, the reading could be 6.65...
The term in "FSO" in your spec means (percent) of full scale uncertainty. My selection...
Topic: Engineering and workplace issues.
from the Forum department...
Customized Control System ExD Enclosure
Originally posted by Rashid on 27 August, 2014 - 12:46 am
We have procured a Customized PLC ExD Enclosure.

New Replies:
Check the certificate number of the enclosure as supplied. If it has a suffix -U, this indicates...
Topic: Power generation equipment control.
from the Forum department...
9FA Gas Turbine Water Injection
Originally posted by Mahmoud Alshimy on 24 August, 2014 - 5:16 am
Water injection service varies greatly for GE gas turbine loads.
New Replies:
CSA, Let me first tell you that I have a mechanical background not I&C. But let me redraft...
Mahmoud Alshimy, Water injection is usually scheduled (calculated) as a function of fuel...
Posted by Ankur Gajjar on 27 August, 2014 - 5:20 am
Data Acquisition of measured temperature value (by means of 2 wire RTD) from Siemens S7-317-2-PN/DP PLC to Excel/LabView/Matlab
Topic: Sensor technologies.
from the Forum department...
Running Analog Signal
Originally posted by jmgusmer on 26 August, 2014 - 6:34 pm
I need help with running analog signal alongside some 110 lines
New Replies:
Basically, anybody can do anything they like, and the deity knows how often Išve seen what youšre...
For 15 feet the first idea would probably _work_ fine with proper cable. A shield within a shield...
It is not considered a good practice to run low voltage signal wires in the same conduit as high...
Topic: Local and wide area networking in factory automation.
from the Forum department...
MODBUS to Lan Convertor
Originally posted by danaqu on 26 August, 2014 - 2:53 pm
Looking for a MODBUS to Lan convertor.
New Replies:
Yes, for 150 meters you could even use spare cat5 pairs with rs485. Regards cww...
It might work. I didn't see any software for configuring it. That type of serial server is...
You may or may not need another converter at the PLC. I would get a pair of RS232 to RS485...
Topic: Local and wide area networking in factory automation.
from the Forum department...
TCP/IP over Ethernet
Originally posted by Tarun on 25 August, 2014 - 1:23 pm
Is TCP/IP on ethernet better?
New Replies:
I'd just use a $35 raspberry pi with a modbus master running on it You would need to write a web...
Here is one device that is getting attention in the hobby market: ...
Many PLC's, HMI's, drives, and other automation devices have Ethernet built-in or as an add-on...
If you are doing that I would get an Ethernet solution that can communicate to your microcontroller...
Basically my application is to host a webserver on a microcontroller to host the data of VFD to a...
This is a very open ended question. As with most things it depends on what you are trying to do....
Topic: Application Questions and Problems
from the Electrical department...
Defeated Circuit Breaker
Originally posted by Kevin Frechette on 26 August, 2014 - 8:33 am
Is it possible to defeat a circuit breaker?
New Replies:
Just about everything I've seen for decades is "trip free", but it does make one wonder,...
This is common place. The CB is typically trip free so it will trip regardless of whether the...
What kind of circuit breakers are they? In my experience most circuit breakers will have a...
Topic: Engineering and workplace issues.
from the Operation support team department...
Generators and leading power factor
Originally posted by Bhagwan on 11 September, 2009 - 8:15 am
Leading power factor for backup generators
New Replies:
Our dear CAM, Somehow I forgot to include that electricity is one method of transferring torque...
Our dear CAM, Electric motors are driven by electric generators. Electric motors are devices...
my dear gentlemen, may i ask question, what makes prime mover burden itself? is it current,...
Topic: Power generation equipment control.
from the Power Generation department...
Getting a better understanding of GT control PART 2
Originally posted by Neo on 11 July, 2014 - 10:48 pm
Getting a better understanding of GT control PART 2.
New Replies:
CSA I am back, and waiting for your reply:) best regards! Neo...
Neo, Are you back?...
Topic: Engineering and workplace issues.
from the UL Shakedown? department...
UL Inspectors
Originally posted by RM on 26 August, 2014 - 5:11 pm
Now that we're on CPAP (UL's naughty list) we are being 'asked' to purchase their training package for better inspection results.
New Replies:
I have not observed them being especially picky but they do seem to have a different point of...
Originally posted by Ali on 20 August, 2014 - 7:30 am
Advantages of isochronous load sharing over iso-droop mode configuration of three generators.
New Replies:
Hello, It all really depends on the capabilities of the governors. Some don't operate so well in...
Topic: PLCs and related questions.
from the I&C department...
Fuse Monitor Alarm infi-90 DCS
Originally posted by Ashiq on 21 August, 2014 - 2:08 am
Fuse monitor slave alarm of IMDSI02-NTDI01 DCS Infi90
New Replies:
email sent....
Dear Mr. John Thanks for your help. Problem occurs at only one TU-Slave card where 11 modules...
Rather than chase the fuse details, let's go back and very clearly describe the problem. Can you...
Topic: Programming languages.
from the Education department...
Java PID example
Posted by Roberto Carabajal on 26 August, 2014 - 1:50 pm
I am searching a PID controller example in Java with source code.
Topic: Power generation equipment control.
from the Power Station department...
Efficiency of ac generators
Originally posted by UNGKU KAMAL on 7 March, 2013 - 1:12 pm
When using ac generators in Power Stations, what are the advantages of using " Flux Cutting " types, compared to using " Magnetic Induction " types.
New Replies:
Bert Wank, Great--all of it. But it seems to address Lorentz Force Motors,...
Topic: Power generation equipment control.
from the Forum department...
GE Mark VI/VIe HMI and Software Questions
Originally posted by Kevin on 8 July, 2014 - 8:17 pm
Specific questions about Mark VI and VIe.
New Replies:
Hello, CSA covered a lot of ground, I'll just fill in a few gaps and correct a few details. I...
Topic: PLCs and related questions.
from the kariayam department...
Ladder logic simulator
Originally posted by cikenkari on 5 March, 2010 - 9:09 am
Ladder logic simulator software portable
New Replies:
Here is one more software simulation option: http://www.cmhsoftware.com/ Constructor ...
Originally posted by arun on 26 August, 2014 - 8:38 am
How to get data from an ABB AC800M plc to display in Cimplicity SCADA
New Replies:
You may use ABB OPC Server. Refer the Link ...
Topic: Power generation equipment control.
from the Mechanical department...
Exit Guide vanes of Gas Turbines
Originally posted by Izhar on 19 July, 2014 - 4:24 pm
Gas turbine exit guide vanes and how to use them
New Replies:
Hello There, Izhar, you did not mentioned about the blade tip clearances. Any increase in it...
Originally posted by . on 18 August, 2014 - 4:41 am
What is the position for Mark 4 HSAA card jumper when we want to perform calibration?
New Replies:
All, >> Berg jumper settings for R, S, T computers: > REF2 - Set to "1" to...
> Berg jumper settings for R, S, T computers: REF2 - Set to "1" to calibrate FB...
Originally posted by bilo7 on 24 August, 2014 - 12:30 pm
trip 9e generator open breaker when underexcitation
New Replies:
bilo7, When a GE-design heavy duty gas turbine equipped with a Speedtronic ("Mark")...
Topic: Engineering and workplace issues.
from the Instrumentation department...
Installation of Ex-ia Converters in Ex-ia Junction Box
Posted by giorgioCDB on 26 August, 2014 - 11:34 am
Installing Ex-ia converters in Ex-ia Junction Box instead of EX-d
Topic: Continuous process industries, DCS questions.
from the Eurotherm 3504 department...
Controller Watch Dog and Output Loop Failure Detection
Originally posted by Mike divine on 22 August, 2014 - 5:32 am
Challenges with achieving the processor watchdog and output loop failure functionality with Eurotherm 3504.
New Replies:
Thanks for your reply. I am currently working on the design....
Originally posted by Sarmad on 21 January, 2011 - 6:33 am
Viability of exporting DCS (Ovation) data to a third party over a wireless (serial) link using OPC server.
New Replies:
Dear Sarmad At our CCPP output from DCS is given to AB PLC and through SCADA. we send &...
Originally posted by Ashiq on 29 May, 2014 - 5:38 am
re-configure Solatron 7951 flow computer.
New Replies:
Dear Mr. JMW Thanks for your information yes i am trying to configure via the front panel...
Originally posted by Christian on 25 August, 2014 - 7:59 am
Adding two 4-20 ma signals to equal one 4-20 ma output signal without a PLC
New Replies:
Actually, on reflection there is a cheap simple way if the input you are driving is the typical 250...

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