Posts from...Today, Saturday, August 30, 2014
from the Electrical Engineer department...parallel operation of generator
We are having 18MW captive power plant to fulfill requirement of power and steam in company.
By sagar on 30 August, 2014 - 6:35 am -
Because of the vibration in the turbine we have to restrict the load on the TG set. The total...
Sagar, Hmmmm....My understanding of the definition of a captive power plant is one that is...
from the Electrical department...Isolated Generator and Droop Governor
Can an isolated generator use droop governor?
By Manoj Dubey on 30 August, 2014 - 3:04 am -
Sir, from above explanation I have understood that steam or fuel inlet will be constant to...
from the Mark VIe Governor department...Mark VIe Governor control
What are the basics of governor control?
Thank you very much for your answer. I am checking now the Turbine control logic software...
N.V.Q, I would also recommend looking at the manuals provided with the turbine (not the Mark VIe...
By JFB on 28 August, 2014 - 5:05 pm -
> N.V.Q, > Please work with GE There are non OEM training companies that do a good job,...
N.V.Q, Please work with GE to get this information. We have discussed this, basically, in the...
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.
Bill Futch, I second everything MIKEVI said; it's not necessary to ramp fuel down before...
By MIKEVI on 28 August, 2014 - 7:27 pm -
Bill, s orry for the long delay in answering, I do not have a good excuse for you. So your...
from the High School department...High School Math - How is this used in the real world?
My high school students ask when/how/if abstract topics like polynomials, factoring, rational functions are ever actually used in the Real World. I don't know..maybe you do?
from the Linux RS485 department...RS485 2-wire auto - Linux support
RS485 PC hardware with 2-wire auto mode AND full Linux support
By digguru81 on 29 August, 2014 - 12:54 pm -
Hi Leo, Have you considered using a USB port to send the signal to your computer? There's a...
from the ELECTRICAL PROJECTS department...Replace RS-485 with Siemens Profibus Cable
I am building a Modbus RTU network and am considering replacing RS-485 cable with Siemens Profibus cable. Want to hear from those who have done this.
By PG on 29 August, 2014 - 10:41 am -
Hello, apparently this guys are Siemens Distributors for South America: http://bit.ly/1nJZxLH ...
from the instrumentation department...Difference Between IP and MAC Addresses
What is the difference between IP address and MAC address?
By David Ferguson on 29 August, 2014 - 9:13 am -
Google it.........short answer, yes you have both MAC is a hardware address assigned at factory of...
from the Forum department...Siemens Statement Help
Converting a Siemens S5 program to ladder and need help with a block.
from the Forum department...Isochronous Load Sharing on Dissimilar Generators
Advantages of isochronous load sharing over iso-droop mode configuration of three generators.
Thanks alot CSA. A great help. Very well explained....
from the Investors department...New Flow Measurement Method
How to find an investor of instruments.
Thank you again. I think what I have to do is to make sure that my idea works perfectly. Then I...
By JMW on 28 August, 2014 - 12:48 pm -
> I am on same process of fund raising that A. Hasseli for a different products line. If anyone...
from the Forum department...MODBUS to Lan Convertor
Looking for a MODBUS to Lan convertor.
By ICP- Robert on 28 August, 2014 - 7:35 pm -
We have a series of products called our TDS series. Using 2 of these, you can form a serial data...
By Curt Wuollet on 26 August, 2014 - 11:06 pm -
Yes, for 150 meters you could even use spare cat5 pairs with rs485. Regards cww...
from the Forum department...Hot Air Dryer Supply / Exhaust Air Handling
Supply and exhaust air handling control method evaluation.
By Curt Wuollet on 28 August, 2014 - 7:27 pm -
IIRC, the quantity that was changing was the exhaust velocity. You already have your supply plenums...
Thanks for your response Curt. Do you mean that you would control the differential pressure...
thanks for your response Curt, Do you mean that rather than running my Supply Blowers at fixed...
By Curt Wuollet on 26 August, 2014 - 11:02 pm -
That differential pressure is the one I would control. Regards cww...
from the I&C department...Solatron flow computer Corrected volumetric flow
re-configure Solatron 7951 flow computer.
By JMW on 28 August, 2014 - 12:18 pm -
Hi, I think the contact details I gave are probably going to get you to them but just in case: ...
from the Education department...Java PID example
I am searching a PID controller example in Java with source code.
By James Ingraham on 28 August, 2014 - 12:11 pm -
Google turned up a few things. This one looks interesting: ...
from the Programming languages department...Shell command in VB 6
Help with the shell command in VB 6
By Max on 28 August, 2014 - 11:34 am -
You are calling a Microsoft Word File not the Microsoft Word Application, it should be like this ...
from the Power Generation department...Getting a better understanding of GT control PART 3
Getting a better understanding of GT control PART 3
from the Instrumentation department...Instrument Control Loop
Maintenance procedure of process control loop.
By Sam on 28 August, 2014 - 7:29 am -
On any live process plant this procedure can be followed directly or be adapted slightly to suit...
from the Forum department...TCP/IP over Ethernet
Is TCP/IP on ethernet better?
What does ethernet port with web server mean? If there is any literature related to that please...
By Curt Wuollet on 26 August, 2014 - 10:56 pm -
I'd just use a $35 raspberry pi with a modbus master running on it You would need to write a web...
By Paul Breneman on 26 August, 2014 - 10:21 pm -
Here is one device that is getting attention in the hobby market: ...
from the Automation List department...Control Valve Cycle Measurement
How to measure the control valve cycles?
By Sam on 28 August, 2014 - 4:38 am -
I think you are making things more complicated than it needs to be. I have never heard about...
By Gerald Beaudoin on 27 August, 2014 - 1:43 pm -
Sure would appreciate any points of view on this one..... Cheers Gerald Beaudoin...
from the Instrumentation and Control department...Calculating Pressure Transmitter Range
How can we test Rangeability of Pressure Transmitter?
By Kamaraj on 28 August, 2014 - 4:34 am -
Thanks Mr.David & Thanks for all....
The word 'Turndown' is used in two ways. One use of the word turndown is to define how far a...
By Kamaraj on 27 August, 2014 - 1:14 am -
Dear Mr.David, In your Last Post you wrote that At 7 bar pressure, the reading could be 6.65...
from the Forum department...9FA Gas Turbine Water Injection
Water injection service varies greatly for GE gas turbine loads.
Mahmoud Alshimy, You are 110% correct. I don't understand your query. If water injection is...
CSA, Let me first tell you that I have a mechanical background not I&C. But let me redraft...
from the Power Generation department...Getting a better understanding of GT control PART 2
Getting a better understanding of GT control PART 2.
Neo, This thread is getting very long--and very disorganized.... ...
from the Forum department...Customized Control System ExD Enclosure
We have procured a Customized PLC ExD Enclosure.
I have checked but the certificate does not have the the suffix U. The suffix number is 06 ATEX...
Check the certificate number of the enclosure as supplied. If it has a suffix -U, this indicates...
from the Forum department...Siemens Procidia upgrade
update info? Upgrading from Siemens 3.1 to latest version.
By anonymous on 27 August, 2014 - 2:52 pm -
> Can anyone give me a ballpark cost on upgrading from siemens 3.1 to the latest version? ...
from the PLC Control department...PID Control using FB41 for Siemens S7-300 PLC
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?
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...
from the Forum department...Data Acquisition from Siemens S7 317-2-PN/DP PLC
Data Acquisition of measured temperature value (by means of 2 wire RTD) from Siemens S7-317-2-PN/DP PLC to Excel/LabView/Matlab
from the Forum department...Running Analog Signal
I need help with running analog signal alongside some 110 lines
By Walt Boyes on 27 August, 2014 - 12:57 am -
Basically, anybody can do anything they like, and the deity knows how often Išve seen what youšre...
By Curt Wuollet on 26 August, 2014 - 11:14 pm -
For 15 feet the first idea would probably _work_ fine with proper cable. A shield within a shield...
By William Sturm on 26 August, 2014 - 11:09 pm -
It is not considered a good practice to run low voltage signal wires in the same conduit as high...
from the Electrical department...Defeated Circuit Breaker
Is it possible to defeat a circuit breaker?
By Curt Wuollet on 26 August, 2014 - 10:34 pm -
Just about everything I've seen for decades is "trip free", but it does make one wonder,...
from the Operation support team department...Generators and leading power factor
Leading power factor for backup generators
Our dear CAM, Somehow I forgot to include that electricity is one method of transferring torque...
"I had to censor everything my sons watched ... even on the Mary Tyler
Moore show I heard the word 'damn'!"
-- Mary Lou Bax