Posts from...
Today, Monday, April 21, 2014
Originally posted by BrownPaper on 20 April, 2014 - 11:34 am
Difference between throttle pressure and 1st stage pressure
New Replies:
The first stage pressure on GE steam turbines is measured just downstream of the first stage...
Your understanding is correct for GE steam turbines....
Topic: Software, including programming, OS issues, etc.
from the Forum department...
MODBUS COMPATIBILITY ISSUES WITH WINDOWS 7
Posted by SALIH SMA on 21 April, 2014 - 7:58 am
We are facing problem with Modicon MODBUS Serial IO Server 7.5 (7.5.0.7) with win7 as compatibility issues.
Topic: Power generation equipment control.
from the Controls department...
Mark-VI Control System T-core Issue
Originally posted by srh on 10 April, 2014 - 6:49 am
Issue being faced on T-core of Mark-VI
New Replies:
Was reading this thread and one question comes to my mind. There was a mention of Lockout Relay...
Topic: Sensor technologies.
from the instrument department...
Dwyer flow switch information
Posted by farzadad on 21 April, 2014 - 3:42 am
dwyer obsoleted flow switch
Topic: Power generation equipment control.
from the Control department...
SynGas Conversion Project
Originally posted by Abhishek on 17 April, 2014 - 5:20 am
Pointers for Syngas Conversion project in India
New Replies:
> what type of conversion process is involved? For example is it: Thanks Phil for your...
Abhishek... what type of conversion process is involved? For example is it: a) Coal to Syngas? ...
Topic: Power generation equipment control.
from the THERMAL GENERATION department...
exhaust spread
Originally posted by BBSALO on 18 April, 2014 - 4:51 pm
Why monitor the exhaust spread of a frame 9E gas turbine
New Replies:
Good answers, but the main question was, "Why do we have to take these readings?" The...
A high spread usually means a flame loss in one combustor and it is cause of trip. There is a...
Hi BBSALO, The exhaust spreads parameters are required to protect the gas turbine from...
Topic: Power generation equipment control.
from the Operations & Maintenance department...
ACC Module on Mark V
Originally posted by Jose Sanchez on 19 April, 2014 - 10:58 pm
Library for instrutions about the keypad on ACC Module in <R> <C> procesors
New Replies:
Jose Sanchez, I'm a lot confused by your post. I'm not aware of any ACC module on any Mark V...
Topic: Information resources, documentation.
from the E & I department...
Easter Greetings
Posted by Phil Corso on 20 April, 2014 - 11:30 am
Easter Greetings
Topic: Power generation equipment control.
from the Forum department...
Turbine Controls
Originally posted by BrownBag on 30 December, 2013 - 7:18 pm
Difference in Turbine Control Modes
New Replies:
Thanks JFB that helped....
Topic: Communications systems and equipment.
from the Forum department...
Modbus via microcontroller
Originally posted by Ed on 20 April, 2014 - 2:40 am
Communicating with device via Modbus RTU through a microcontroller.
New Replies:
I'd suggest you first try an easy way to use a PC: http://www.ctrlterm.com/custom.htm Once the...
If it were me, I'd connect a PC with a serial port running a generic Windows Modbus 'test' master,...
Originally posted by speedtronic on 19 December, 2008 - 10:04 am
What is the concept of Impedance protection for synchronous Generator(turbo/hydro)?
New Replies:
Sajad... are you referring to under-excited operation as related to Impedance-Protection? ...
hi... can you explain what the under impedance protection? thank you ...
Topic: PLCs and related questions.
from the Urgent department...
Time and Date in Honeywell control builder
Originally posted by Mostafa on 8 April, 2014 - 2:48 pm
How could use time and date in control module?
New Replies:
> but unfortunately i couldn't find variables CEE1.HOUR...... > i have many control module...
Topic: Software, including programming, OS issues, etc.
from the Forum department...
Upgrading Siemens PCS7 V 6.1
Posted by RAB on 18 April, 2014 - 6:41 pm
Can you plz suggest the best solution to upgrade Siemens PCS7 to latest version?
Topic: Power generation equipment control.
from the Forum department...
Formula for steam flow in venturi tube
Posted by RAB on 18 April, 2014 - 6:27 pm
Required exact formula to calculate flow in a venturi tube
Topic: Continuous process industries, DCS questions.
from the Department department...
Do I Understand PID's?
Originally posted by Piedon on 17 April, 2014 - 9:58 pm
Just want to see if I understand these things.
New Replies:
A PID controller output depends on the error between the process variable PV and a target value or...
Topic: Motion control, servos, steppers, etc.
from the Forum department...
Driving a Stepper Motor
Posted by Hans on 18 April, 2014 - 3:40 pm
I am seeking advice on the best methods to effectively control a stepper motor.
Topic: Power generation equipment control.
from the Instrumentation department...
Vitec Vibration probe
Originally posted by NVS on 17 April, 2014 - 12:27 pm
Installing Vitec 4033-500 in place of 4033-400 velocity transducer
New Replies:
NVS, I don't believe the impedance difference will affect the Mark IV, but you should be certain...
Impedance here referring to the electronic segment from your sensing element. 4033-500 is designed...
Topic: Continuous process industries, DCS questions.
from the inst department...
Gulde control valves
Originally posted by self on 23 August, 2008 - 2:07 am
Suppliers of GULDE control valves.
New Replies:
By Dipankar Biswas on 17 April, 2014 - 11:41 pm -
> Please let me know the suppliers of GULDE make control valves. We M/s Continental Valves...
Topic: Continuous process industries, DCS questions.
from the instrumentation department...
I/P positioner and I/p transducer Control valve
Originally posted by Emerson process management on 13 May, 2012 - 4:18 am
Difference between I/P positioner and I/p transducer
New Replies:
Look at the principle of operation and internal diagrams of a Bellofram Type 1000 I/P. It does not...
hi sir, I had a question why diaphragm is not used in i/p converter? why they using the bellows?...
Topic: Communications systems and equipment.
from the Instrumentation and Control department...
Communication between Speedac NXT weighing Controller and Honeywell Scada
Originally posted by RKM on 17 April, 2014 - 3:15 pm
Speedac NXT controller is not communicating with Honeywell Server via RS 485 serial communication.
New Replies:
Was the former device communicating properly right up until it was replaced or is the replacement...
Topic: Software, including programming, OS issues, etc.
from the ANY department...
Software suggestions
Posted by Centrafused on 17 April, 2014 - 8:04 pm
New to automation and searching for a simple solution on some safety concerns.
Topic: Motion control, servos, steppers, etc.
from the Automation department...
Hall/Magnetic Sensor
Originally posted by Biju CG on 17 April, 2014 - 4:10 am
Hall Sensor Replacement Failed !
New Replies:
I can think of 4 common and several not so common output configurations for this type of sensors,...
Topic: Power generation equipment control.
from the Control&Automation department...
Preselected mode for Mark V
Originally posted by Abbernardo on 3 April, 2014 - 4:49 pm
PreSelected mode when connected to grid and Mark V trip
New Replies:
K.R. Manish, What is FGMO, please? This is a good discussion, and as such, I hope you...
Dear CSA, With reference to the FGMO mode which you have described, I agree with you that it is...
Originally posted by Detlev Neumann on 17 April, 2014 - 4:09 am
Could I say that with the following facts my device is MODUS-RTU compatible
New Replies:
By Lynn August Linse on 17 April, 2014 - 11:10 am -
Looks good to me, and the 'no parity' option *IS* important as some Modbus devices don't support...
Topic: Communications systems and equipment.
from the Instrumentation department...
ML1400 PLC communicate PIC 16f874 over modbus protocol
Posted by Srinivas on 17 April, 2014 - 11:02 am
ML1400 PLC communicate with PIC 16f874 over modbus protocol and write data to LCD connected to microcontroller
Topic: Communications systems and equipment.
from the Forum department...
MODBUS Break Condition & Checksum
Originally posted by Derek on 16 April, 2014 - 12:14 pm
MODBUS RTU using RS485 to RS232 converter connected to RS232 to USB converter to communicate with electric meter using MODBUS Poll.
New Replies:
By Lynn August Linse on 17 April, 2014 - 10:53 am -
Having the RS-485 +/- reverse (or swapped) will usually look like a BREAK condition if blindly...
Topic: Communications systems and equipment.
from the Automation department...
DCS Yokogawa Communication Issue
Originally posted by Zarar on 13 April, 2014 - 2:21 pm
Yokogawa DCS communication with Modbus slave device using ethernet redundant connection with ALE111.
New Replies:
By Elbert van der Bijl on 17 April, 2014 - 5:15 am -
this behavior is by design and it will not occur when the Modbus slave is correctly responding to...
Topic: Sensor technologies.
from the Instrumentation & Control department...
Liquid gas level measurement
Originally posted by Engineer92 on 27 March, 2014 - 2:52 am
Liquid Gas Level measurement
New Replies:
The instrument to use in a application like this is a DP with capillaries and chemical seals with...
Originally posted by Neo on 11 April, 2014 - 10:08 am
Increase in reactive power drawl at generation source.
New Replies:
Hi Neo, From what you have described, it sounds like that the generators are tripping due to...
Topic: Power generation equipment control.
from the measurments department...
Standard for temperature measurement
Posted by Mahmoud Sallam on 17 April, 2014 - 12:00 am
Location of temperature measurements (problems)

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