Posts from...Today, Monday, September 22, 2014
from the Instrumentation department...Thermocouple Temperature Drops Suddenly
Unexplained temperature drop while process is running
Somewhere between the hot junction and the analog input there's a short circuit in the extension...
from the Forum department...Web based HMI for Greenhouse
Looking for an affordable OPC Web based HMI solution
The easiest way to build your own web UI is to use Opto22's Groov. Its a browser based operator...
from the Gas Turbines department...What Is CEMS Used For?
What is CEMS used for and how does it operate in Power Generation gas turbines (GE Frame 9e)?
Just some clarification.... In general, a CEMS (Continuous Emissions Monitoring System) is a means...
By 309EGuy on 21 September, 2014 - 6:25 am -
The continous emmissions monitoring system is used to monitor the output of the exhaust stack. The...
from the No Power Source At the Tank department...Wanted: Simple and Inexpensive Automated Pump Control System Solution
Looking for a simple and inexpensive pump control system to automatically fill water tank. No power source at the tank. Pump is 700 meters from tank.
I am the original poster and am grateful for all the suggestions, expert advice, and links to...
By Jfuess on 21 September, 2014 - 10:38 am -
We are working on such a kit. Our preliminary designs have proved to work at 1.5 miles away with...
from the Forum department...Emergency Stop Wiring for Multiple Remote ESTOPs
What is the standard to connect multiple remote ESTOPs serially to Estop Monitor Relay
By Bob Peterson on 21 September, 2014 - 12:41 pm -
I doubt there is any international standards for such things. The main issue may well be that...
from the Power Generation department...When Will 88CR start?
GT start up sequence, when will 88CR get started?
CSA: Thank you so much for your detailed and helpful response. After reading your response...
Neo, You didn't post L1X.... It's kind of critical to the whole discussion. And, it's also kind...
from the control department...4 wire vs. 3 wire RTD
What is the difference between 4 wire RTD and 3 wire RTD?
3 wire is more than adequate at that distance. your vendor can better inform you as it depends...
By san on 21 September, 2014 - 7:15 am -
For a 10m cable, which is the best options? 2 wire/3 Wire/4 wire RTD. I am going to test the...
from the Forum department...Sliding Mode Control - MATLAB
Need help simulating sliding mode controller using MATLAB/SIMULINK
from the Forum department...Mark V Diagnostic Alarms
Mark V TMR control panel, MS5001P, Diagnostic Alarms
Hello everybody, I investigated this issue with SVL and DV sirnals during these holidays on...
Ivan, We had a similar problem last year. We we're getting Voter Mismatch alarms for SVL (Bus...
By visitor on 19 September, 2014 - 10:51 pm -
Often when cards are zapped by stray voltages, the isolation circuits (caps) can hold charge that...
By CuriousOne on 19 September, 2014 - 9:49 pm -
I once had a lightning strike in the switchyard and somehow voltage managed its way to the 125DC...
Ivan, When the generator breaker is closed it's typical for GE-designed synchronizing circuits...
CSA, Today I have investigated this issue more deeply by myself and found the next: - All...
CSA, These alarms occur more often when generator breaker closed already (approximately every...
Ivan, When do these alarms occur? During normal full speed operation with the generator breaker...
from the networking department...Information regarding tag in Control logix over Ethernet/IP
Are controller tag details for control logix is available on ethernet/IP? Using 1756-EN2T module in controller chassis for communication.
By Ikhtiander on 21 September, 2014 - 3:44 am -
Psahu, It is depend on what third party devices you would like to connect. Can you be more...
By Bob Peterson on 20 September, 2014 - 9:48 am -
The Ethernet/IP protocal is well defined in the spec for it. Best bet is to either buy the spec and...
from the Forum department...excitation control
By Mine on 20 September, 2014 - 8:42 am -
One more question: where is the limit point between Generator terminals and grid? The other...
from the Software department...Using MODBUS in Visual Basic 6
Visual Basic 6 sp 6
Ethernet Communication Port 502
Visual Basic 6 sp 6
Ethernet Communication Port 502
By china taiwan on 20 September, 2014 - 6:04 am -
my name is James Lin ...... my email " firstname.lastname@example.org " ...
from the R & D department...Enable Register Read in LabView
When reading registers in MODBUS using LabViewm, how do I read data from registers at addresses 43XXX?
from the Modbus department...Non-Isolated and Isolated Modbus Slaves on Bus
Bus contains isolated and non-isolated slaves. Considerations when connecting everything together?
from the Simulation department...Automatic Volage Regulation
Question on the behavior of AVR after synchronization.
Engr.. Is it correct in saying that adjusting vars when operating in auto just changes generator...
Engr... Reur 29-May-14 post,"Can u explain please what happen in reality?" Are you...
from the Forum department...Power Meter Destroys Modbus RTU Bus Communication?
Problem with SCADA system that supervises electrical power flow for a residential building. Connected with Modbus RTU over RS485 daisy-chained 2-wire. The communication on the bus seems to be destroyed with Schneider PM750 connected.
> By the way,, does it exist any utility to check the serial interface of the Pm75? I'm thinking...
By Lynn August Linse on 18 September, 2014 - 4:08 pm -
If you expect lightning/grounding damage, what I have done a few times is power everything off...
I've been researching this problem today and tried both biasing of the bus, different common/shield...
from the Forum department...WDFP QLC Card Download
Problem downloading to QLC card with LC Loader
from the Forum department...Yokogawa DCS Analog Module AAI143
Difference between analog mA value and their correspondent raw value.
I checked the Tunning parameters and there is an error. Maybe is a good idea to do an offline...
from the Mechanical Engineering department...Frame 9e Bearing Drawings
Bearing #1 drawings for a GE Frame 9e are missing.
from the Forum department...DCS analog input problem
DCS Analog input signals didn't work with ADAM card
Mr. Fawzy, That's a very interesting observation. A common for all channels is what allows...
from the Instrument and Control department...Siemens S5 CPU 922 Run and Stop LED Do Not Turn ON
Run and Stop LED on front of Siemens S5 922 CPU doesn't turn ON on powering of rack. Only BASP LED on front of CPU is turned ON.
By Bob Peterson on 17 September, 2014 - 5:26 pm -
We have started getting a fair number of service calls for S5 units. They are closing in on thirty...
By Kevin Frechette on 17 September, 2014 - 1:37 pm -
The only thing I can think of is that the Rack is faulted. The backup battery may be missing or...
from the ModbusTCP department...PROSOFT MVI56-MNET Slave Response Time
PROSOFT MVI56-MNET communication response time and performance
By Bob Peterson on 17 September, 2014 - 5:19 pm -
Hint - prosoft has very good tech support....
from the Forum department...Why Industrial Automation & Robotics in Mechanical Engineering if it's more electricity?
Master of technology in Industrial Automation & Robotics
By James Ingraham on 17 September, 2014 - 4:59 pm -
You could argue that "Process Control" is essentially unrelated to "Industrial...
The first rule of control engineering is that you can't hope to control anything unless you...
from the C&I department...Mark V Signal Scaling in HMI
Exciter signals gain in mark V
VM, Can you please post the relevant lines (rows) from IO.ASG? What happened when you put the...
from the Forum department...Excitation system
What is an excitation system is and what role it does play in the start up of a prime mover like a gas turbine
The Power Factor is a function of the MVar. If your unit or turbine is connected to the grid,...
from the PLC comm error department...TSX Premium PLC Problem
Telemecanique TSX Premium PLC unstable operation
By visitor on 17 September, 2014 - 10:28 am -
Thank you very much for your answer. I got contact with local Schneider representatives. They...
from the Wish i paid more attention at University department...Power Factor on LV/HV Sides of a Transformer
how to analyse the power factor of a system across a transformer
Yes i sincerely need a comprehensive calculation on this power factor issue. Thank U very much as i...
from the Forum department...RSLinx issue in VMWare WIn 7 32 bit VM
I can do a serial upload and download but I cannot go online with RSLogix 500 inside a VM running WIn 7 32 bit
I just got the 2 port version and it works like a champ. Upload, download and online. Thanks! ...
from the Communication department...Communication Between Control Logix and Centum VP Using Ethernet/IP
Communication not getting established between Yokogawa (ALE-111) and Control logix using Ethernet/IP.
from the Forum department...GE Frame 7EA Combustion Turbine Starting Motor
Starting motor does not cutout when a normal shutdown is given below 60% speed.
Sorry I have been away for so long. I honestly don't think I have had more than 5 minutes in my...
This life is a test. It is only a test. Had this been an actual life,
you would have received further instructions as to what to do and where