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- PC reliability?
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- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
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Posts from...
Thursday, December 13, 2007
My company uses Mark IV to control Gas Turbine Generator (GTG). It's often got trip caused by Unit Auxiliary Transformer (UAT) when the unit goes online. What possible things can I do to solve this problem?
New Replies:
By CSA on 13 December, 2007 - 2:02 am -
By CSA on 13 December, 2007 - 2:02 am -
When you say the unit trips because of the UAT, how does the UAT trip the unit? Is it through a...
We are in the middle of design for one of the most complex fish hatcheries ever to be built in North America. Our engineering consultant is recommending standard PLC and SCADA alarm and control system but one of our staff is really pushing a WinPLC based system...
New Replies:
By Michael Griffin on 13 December, 2007 - 2:00 am -
By Michael Griffin on 13 December, 2007 - 2:00 am -
In reply to William Sturm: The following is a bit of a long story, but I think the background is...
We have GE MS5002B (regenerative cycle) gas turbines with Mark V control system. During startup we have problems with flame stability (sometimes loss of flame)...
New Replies:
By harith akram on 13 December, 2007 - 1:58 am -
By harith akram on 13 December, 2007 - 1:58 am -
To avoid loss of flame, reduce the turbine warmup time (K2W) to reach turbine to acceleration speed...
Pneumatic controller used for steam turbine driven feedwater pump's control valve, which controls the pump speed from the pressure setting corresponding to feedwater pressure?
New Replies:
By turbino on 13 December, 2007 - 1:58 am -
By turbino on 13 December, 2007 - 1:58 am -
First off, thanks for your response. Yes, I do have a bit of gray hair, but my age has nothing to...
What is the effect of water injection in Gas Turbine on Efficiency
New Replies:
By CSA on 13 December, 2007 - 1:56 am -
By CSA on 13 December, 2007 - 1:56 am -
GE, of course.
Wood Group.
TTS.
To name a few....
How can I reduce the acceleration time and increase the rate of FSR in turbine ms9001e?
New Replies:
By CSA on 13 December, 2007 - 1:53 am -
By CSA on 13 December, 2007 - 1:53 am -
Reducing the acceleration comes at a cost--to the hot gas path parts life. The air flow through the...
Combustion Trouble alarm during higher load
New Replies:
By Ray on 13 December, 2007 - 1:49 am -
By Ray on 13 December, 2007 - 1:49 am -
The control system is a Allen-Bradley solid state system. We did find two T/Cs that were bad,...
Why are alternators used over DC motors to produce electricity?
Connection with SCADA protocol translator ASE SPT4-NET with convertor mi400/rts rs232/rs485
I'm making a logging function on a Linux system.
I need a PHP function to read from a PLC using Modbus TCP. Or another way of reading data from Modbus TCP an placing it in a MySQL database.
I need a PHP function to read from a PLC using Modbus TCP. Or another way of reading data from Modbus TCP an placing it in a MySQL database.
New Replies:
By Michael Griffin on 13 December, 2007 - 1:20 am -
By Michael Griffin on 13 December, 2007 - 1:20 am -
Is the web server going to be located at the PLC, or is it supposed to be located somewhere else...
By Paul Wacker on 13 December, 2007 - 12:59 am - If you're OK with using Perl, it looks like there's a module available. It wouldn't be too...
How to convert raw values to engineering units
New Replies:
By Michael Griffin on 13 December, 2007 - 1:11 am -
By Michael Griffin on 13 December, 2007 - 1:11 am -
The input should be calibrated such that full scale is some known value (volts or millivolts), and...
Question about AC servo motor drives
New Replies:
By Leonid on 13 December, 2007 - 1:07 am -
By Leonid on 13 December, 2007 - 1:07 am -
I think that you need 2-axis motion controller for axes synchronization and analog servo amps with...
Can somebody connect Twido with Citect?
Frame 5 14MW Gas Turbine--how long to wait between shutdown after a run and starting new run?
AC800M possible interface with legacy ABB products. (MB300, GCOM)
New Replies:
By Anonymous on 13 December, 2007 - 1:00 am -
By Anonymous on 13 December, 2007 - 1:00 am -
Hello,
I have another question for you, Paulo. What are you using GCOM for? I'm very interested...
Permissible input frequency variations by VFDs available.
New Replies:
By Mike McLeod on 13 December, 2007 - 1:00 am -
By Mike McLeod on 13 December, 2007 - 1:00 am -
Arvind,
Naturally, you will need to speak with representatives from some of the manufacturers of...
I was interested to know others opinions on tuning of loops with large process time constants and small dead time's. These cause the Tp/Td ratio to be quite large, hence causing very large Kc when using the Z-N method's.
New Replies:
By Peter Nachtwey on 13 December, 2007 - 12:57 am -
By Peter Nachtwey on 13 December, 2007 - 12:57 am -
Why didn't you stick with the IMC gains? They will work. I didn't reply before because I thought...
By Bruce Durdle on 13 December, 2007 - 12:01 am - Aha - you have an interactive process. Temperature is usually very slow and noise-free, so can...
Trying to remember...
Has anyone tried Cellular Modems?
New Replies:
By Paul Wacker on 13 December, 2007 - 12:54 am -
By Paul Wacker on 13 December, 2007 - 12:54 am -
I would recommend you consider AirLink (who is now part of Sierra Wireless). They have a number of...
Cable connection XBTG 2110 to PC
The Fieldbus real limitation is within the scan time?
New Replies:
By Jonas Berge on 13 December, 2007 - 12:15 am -
By Jonas Berge on 13 December, 2007 - 12:15 am -
It is not limited to one loop per bus. You can have many loops per bus, even for fast loops.
UOP...
Finding a solution for expensive D-I/O for Foundation Fieldbus
New Replies:
By Jonas Berge on 13 December, 2007 - 12:15 am -
By Jonas Berge on 13 December, 2007 - 12:15 am -
The original post from Carmel was onto something.
Use Foundation fieldbus for...
using SQL in TXP ES680
New Replies:
By GP on 13 December, 2007 - 12:11 am -
By GP on 13 December, 2007 - 12:11 am -
Please repeat your question, however check what it is you write down before you post it.
I will...
Need advice on suitable software and GSM modem that can send SMS messages to mobile phone upon OPC Alarm tag.
New Replies:
By Cinzia La Morgia on 13 December, 2007 - 12:10 am -
By Cinzia La Morgia on 13 December, 2007 - 12:10 am -
Did you try SMS Server? SMS Server is a add-on for CitectSCADA that lets you to notify via SMS...
What should be the current flowing in the secondary of the droop control CT?
Are IML procedures ever interrupted by other IML procedures?
New Replies:
By olivier chesnais on 13 December, 2007 - 12:06 am -
By olivier chesnais on 13 December, 2007 - 12:06 am -
He discovered strange behavior of his system. It looks like the problem comes from IML task...
from the R&D department...
Implementation of ModbusRTU over RS485 (2 Wire) using Rabbit3000 processor
Implementation of ModbusRTU over RS485 (2 Wire) using Rabbit3000 processor.
Use of ABB pH Sensor with Foxboro pH Transmitter.
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