Posts from...Today, Monday, April 21, 2014
from the Forum department...Turbine Throttle Pressure and 1st Stage Pressure
Difference between throttle pressure and 1st stage pressure
By Dave Amundson on 21 April, 2014 - 8:57 am -
The first stage pressure on GE steam turbines is measured just downstream of the first stage...
By JFB on 20 April, 2014 - 8:59 pm -
Your understanding is correct for GE steam turbines....
from the Forum department...MODBUS COMPATIBILITY ISSUES WITH WINDOWS 7
We are facing problem with Modicon MODBUS Serial IO Server 7.5 (126.96.36.199) with win7 as compatibility issues.
from the Controls department...Mark-VI Control System T-core Issue
Issue being faced on T-core of Mark-VI
Was reading this thread and one question comes to my mind. There was a mention of Lockout Relay...
from the instrument department...Dwyer flow switch information
dwyer obsoleted flow switch
from the Control department...SynGas Conversion Project
Pointers for Syngas Conversion project in India
> 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? ...
from the THERMAL GENERATION department...exhaust spread
Why monitor the exhaust spread of a frame 9E gas turbine
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...
from the Operations & Maintenance department...ACC Module on Mark V
Library for instrutions about the keypad on ACC Module in <R> <C> procesors
Jose Sanchez, I'm a lot confused by your post. I'm not aware of any ACC module on any Mark V...
from the Forum department...Turbine Controls
Difference in Turbine Control Modes
from the Forum department...Modbus via microcontroller
Communicating with device via Modbus RTU through a microcontroller.
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,...
from the E & I department...Impedance protection for synchronous Generator
What is the concept of Impedance protection for synchronous Generator(turbo/hydro)?
Sajad... are you referring to under-excited operation as related to Impedance-Protection? ...
By sajad on 19 April, 2014 - 7:28 am -
hi... can you explain what the under impedance protection? thank you ...
from the Urgent department...Time and Date in Honeywell control builder
How could use time and date in control module?
By Robert Perez on 19 April, 2014 - 8:56 am -
> but unfortunately i couldn't find variables CEE1.HOUR...... > i have many control module...
from the Forum department...Upgrading Siemens PCS7 V 6.1
Can you plz suggest the best solution to upgrade Siemens PCS7 to latest version?
from the Forum department...Formula for steam flow in venturi tube
Required exact formula to calculate flow in a venturi tube
from the Department department...Do I Understand PID's?
Just want to see if I understand these things.
A PID controller output depends on the error between the process variable PV and a target value or...
from the Forum department...Driving a Stepper Motor
I am seeking advice on the best methods to effectively control a stepper motor.
from the Instrumentation department...Vitec Vibration probe
Installing Vitec 4033-500 in place of 4033-400 velocity transducer
NVS, I don't believe the impedance difference will affect the Mark IV, but you should be certain...
By Franco Kew on 18 April, 2014 - 4:42 am -
Impedance here referring to the electronic segment from your sensing element. 4033-500 is designed...
from the inst department...Gulde control valves
Suppliers of GULDE control valves.
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...
from the instrumentation department...I/P positioner and I/p transducer Control valve
Difference between I/P positioner and I/p transducer
Look at the principle of operation and internal diagrams of a Bellofram Type 1000 I/P. It does not...
By oil&gas on 17 April, 2014 - 5:26 am -
hi sir, I had a question why diaphragm is not used in i/p converter? why they using the bellows?...
from the Instrumentation and Control department...Communication between Speedac NXT weighing Controller and Honeywell Scada
Speedac NXT controller is not communicating with Honeywell Server via RS 485 serial communication.
Was the former device communicating properly right up until it was replaced or is the replacement...
from the ANY department...Software suggestions
New to automation and searching for a simple solution on some safety concerns.
from the Automation department...Hall/Magnetic Sensor
Hall Sensor Replacement Failed !
I can think of 4 common and several not so common output configurations for this type of sensors,...
from the Control&Automation department...Preselected mode for Mark V
PreSelected mode when connected to grid and Mark V trip
K.R. Manish, What is FGMO, please? This is a good discussion, and as such, I hope you...
By K.R. Manish on 17 April, 2014 - 3:44 am -
Dear CSA, With reference to the FGMO mode which you have described, I agree with you that it is...
from the Forum department...Can I say my device is MODBUS-RTU compaible when.....
Could I say that with the following facts my device is MODUS-RTU compatible
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...
from the Instrumentation department...ML1400 PLC communicate PIC 16f874 over modbus protocol
ML1400 PLC communicate with PIC 16f874 over modbus protocol and write data to LCD connected to microcontroller
from the Forum department...MODBUS Break Condition & Checksum
MODBUS RTU using RS485 to RS232 converter connected to RS232 to USB converter to communicate with electric meter using MODBUS Poll.
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...
from the Automation department...DCS Yokogawa Communication Issue
Yokogawa DCS communication with Modbus slave device using ethernet redundant connection with ALE111.
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...
from the Instrumentation & Control department...Liquid gas level measurement
Liquid Gas Level measurement
By Sam on 17 April, 2014 - 3:45 am -
The instrument to use in a application like this is a DP with capillaries and chemical seals with...
from the Forum department...Effect of improper grid connection on reactive power
Increase in reactive power drawl at generation source.
By K.R. Manish on 17 April, 2014 - 3:22 am -
Hi Neo, From what you have described, it sounds like that the generators are tripping due to...
from the measurments department...Standard for temperature measurement
Location of temperature measurements (problems)
Lysistrata had a good idea.