Posts from...
Today, Wednesday, October 1, 2014
Topic: Power generation equipment control.
from the Mechanical department...
Initial Torque Required for Gas Turbine
Originally posted by Izhar on 2 September, 2014 - 5:21 am
How to calculate the initial torque required by gas turbine
New Replies:
Why do you use a special fixture to jack the turbine at the generator coupling? Are turbine starts...
Dear all Thanks alot for the feedback! CSA thank you very much for your responses. I was away...
Topic: Power generation equipment control.
from the Gas Turbine Control department...
Rustronic Mk2 Information
Posted by Kev Magee on 1 October, 2014 - 11:57 am
Looking for information on Rustronic Mk2 GT controllers
Topic: PLCs and related questions.
from the twido suite department...
PLC timed sequence
Posted by JustinDee on 1 October, 2014 - 7:49 am
is it possible to stop all TON TOFF timers?
Topic: Software, including programming, OS issues, etc.
from the Forum department...
Foxboro I/A series tutorial
Posted by putrasuha on 30 September, 2014 - 10:25 pm
Foxboro tutorial
Topic: Software, including programming, OS issues, etc.
from the Forum department...
Adding Modbus register values together
Originally posted by David on 20 August, 2014 - 3:07 pm
How can you add MODBUS registers?
New Replies:
I have a solution in which you will also have a display of the values and the sum. Using our...
Topic: Human-Machine Interface and SCADA.
from the Cook Rooms department...
Controlling Diffrent Cookers Using Same HMI
Originally posted by cmshelton on 24 September, 2014 - 8:22 pm
control different cookers on each others HMI
New Replies:
Thanks James Ingraham, I will search more and look into this...
> I was hoping it could be done with the Panel Veiw 1000 plus HMI's we [are] already using. ...
Thanks for the replys I was hoping it could be done with the Panel Veiw 1000 plus HMI's we or...
Topic: Sensor technologies.
from the Instrumentation department...
Load cell output mV linearity
Originally posted by Pradeep on 28 September, 2014 - 5:16 am
Whether load cell output in mV will linearly increment according to weight added to it?
New Replies:
In case of zero load, the load cell is showing some mV output with supply voltage - whether this...
Ideally, yes, but . . . . A load cell is ratiometric, that is, its output is proportional to the...
Topic: Power generation equipment control.
from the mechanical department...
Flow Divider Problem in GE Frame 9e Turbine
Posted by karim elrawy on 30 September, 2014 - 1:05 pm
Looking for advice on maintaining flow divider in our GE frame 9e turbine
Topic: Communications systems and equipment.
from the Master Thesis world department...
Master Thesis Guidance With Protocols
Originally posted by Sandra Calvo on 26 September, 2014 - 3:56 am
Trying to decide which communication protocol is better for the API I am designing for my Master Thesis.
New Replies:
The security/cost of MODBUS is exceptionally inviting for most applications. It is a...
You could also look through the California Smart Grid initiatives, as they are trying to define...
Thank you all for your responses. I am strongly considering Modbus, because DNP3 seems to be...
Hi. You must pay attention in the security (cryptography) issues. A large scale data network...
I can only speak for the last 35 years (20 with the Fisher ROC series) and it has been Modbus all...
Wow, that's a tall order. Which is better? :-) Really it depends on your market. Modbus is great...
Topic: Software, including programming, OS issues, etc.
from the Forum department...
Open Source PLC Programming Software
Originally posted by Marx on 29 September, 2014 - 12:46 am
I wanted to know what are the best open source PLC Programming software to use
New Replies:
> I wanted to know what are the best open source PLC Programming software to use? > I am a...
Originally posted by Simon on 25 September, 2014 - 4:21 am
Why do people who believe that the OEM is the best alternative for off-warranty service & retrofit contracts why?
New Replies:
Simon, Great philosophical question, and I'm going to try to answer each of your points. >...
Topic: Software, including programming, OS issues, etc.
from the Student advice department...
General Questions about MODBUS
Originally posted by Sandra on 29 September, 2014 - 8:12 am
A few questions about MODBUS protocol
New Replies:
> 1. Can Modbus create data groups/classes? Sometimes yes. > 2. Are the data types fixed,...
Topic: Communications systems and equipment.
from the Solar department...
Modbus Training Courses
Originally posted by Kyle on 19 December, 2013 - 9:37 pm
Looking for Modbus training courses
New Replies:
Texas Automation Systems which partners with Techstar gives great instruction on Modbus. ...
Originally posted by Sakthi Venkatesh on 27 September, 2014 - 5:00 am
After calibrating, why we are reversing the range for Level Transmitter while measuring Level?
New Replies:
In the old days when we used electronic and pneumatic DP cells we had to swop the HP and LP legs...
or you may do one more thing, consider the range from -2500 to 0. that is what we usually do in our...
Because your senior engineer told you to:^) Regards cww...
the DP cell is put in reverse to calibration (L side of meter is on bottom tap and H side is on top...
Posted by Brian on 28 September, 2014 - 9:18 pm
Setting up connectivity for VB.NET 2012 OPC. How do I list the TAGs in my controller?
Topic: Power generation equipment control.
from the Power Generation department...
When Will 88CR start?
Originally posted by Neo on 10 September, 2014 - 10:27 am
GT start up sequence, when will 88CR get started?
New Replies:
Neo, I believe L14HT will be a logic "1" when the shaft speed is above 8.4% speed...
CSA: TNK14HT1 = 8.4 TNK14HT2 = 3.2 1)
      L14HT        L14H_ZSPD_BP
...
Neo, Whoa! What about L14HT at your site?!?!?! How is L14HT used at your site? What are...
CSA I am grateful to your response. Thank you sincerely. Best regards! Neo...
Neo, Is the unit experiencing problems during start-up? High exhaust temperatures? High exhaust...
CSA: Thank you so much for your point of view about FSR control during GT startup. We are...
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:
I agree that the fewer converters you have transferring the signal, the better. Connecting one...
Topic: Motion control, servos, steppers, etc.
from the Electrical & Systems department...
Over-speeding of Slave Motor in Rock Conveying System
Posted by Ravindra K Maheshwari on 28 September, 2014 - 6:16 am
Rock coveyor is being driven by Master and slave, two motors in load sharing mode. Slave motor is over-speeding when master gets higher loads.
Topic: Power generation equipment control.
from the E& I department...
Governor Control in Speed Control Mode
Originally posted by Bhavin on 26 September, 2014 - 9:06 am
Islanding problem when grid trips. The case happens only 5 times out of 100, rest everything goes good.
New Replies:
> grid cuts in low voltage & > manually isolating the grid I guess I still don't...
Bhavin/BJM, If you're certain that the boiler can supply sufficient steam to maintain the...
Thanks for reply, I want to add. Steam production is also enough to take the load (As no...
Duh!.. I was not really thinking about the info provided. IF you are connected to a grid with...
from just the information provided, I sounds like you are not increasing your boiler steam...
Topic: Power generation equipment control.
from the IMD department...
Mark-VIe Servers
Originally posted by MJ on 27 September, 2014 - 3:58 am
Functions of Servers provided with Mark-VIe
New Replies:
Dear MJ, The PRIMARY difference between the two HMIs is that the Mark VIe...
Topic: Communications systems and equipment.
from the Engineering design department...
RS485 Connnection to DV-6 VE4006P2
Originally posted by Bhaskar Mittal on 26 September, 2014 - 12:53 pm
Connecting DCS to VFDs on 485 Modbus RTU
New Replies:
Modbus is not plug-and-play even if Emerson's laughable marketing spiel, "Plug your Serial...
Topic: Power generation equipment control.
from the E& I department...
Load Shading System
Originally posted by BJM on 26 September, 2014 - 9:13 am
Looking for detail knowledge on the Load shading system
New Replies:
Thanks for info,...
... or possibly "load sharing"....
Ah, the seldom-used and little-known practice of load shading. You'll probably have better luck...
Topic: Continuous process industries, DCS questions.
from the General Engineering department...
DCS vs PLC
Originally posted by Krishna K. Naidu on 29 June, 2006 - 12:11 am
Advantages of DCS over PLC for Gas turbine control
New Replies:
I am in agreement and as a proponent of Allen Bradley systems, the difference is in the planning....
Topic: Power generation equipment control.
from the Maintenance department...
Stability of Generators in Isochronous Mode
Originally posted by Erwin on 24 September, 2014 - 1:00 pm
Why are two or more engines (gen sets) in Isochronous mode without load sharing make the system unstable?
New Replies:
Erwin, 1) Yes. Load is equivalent to fuel flow-rate (for internal combustion engines; steam for...
Not very stable and not very constant. So we have broken the isoch machine in search for a...
First of all, thanks for your response. Most helpful. But there are something that I am still not...
Topic: Continuous process industries, DCS questions.
from the Instrumentation department...
Instrument Control Loop
Originally posted by Waqar Ahmed on 26 June, 2014 - 3:18 am
Maintenance procedure of process control loop.
New Replies:
If the process was previously running normal without hunting or instability, then something has...
Topic: PLCs and related questions.
from the Forum department...
Contactless Card Reader and PLC
Posted by Amer on 26 September, 2014 - 3:30 am
How to connect contactless card reader to PLC?
Originally posted by Arosha on 21 September, 2014 - 9:55 am
What is the standard to connect multiple remote ESTOPs serially to Estop Monitor Relay
New Replies:
I like Bob's answer the best. I have worked on conveyors over half mile in length with all pull...
Topic: Engineering and workplace issues.
from the Automation List department...
Why 4-20 ma is used in Analog Signals?
Originally posted by sreeraj on 3 June, 2007 - 12:25 pm
Why 4-20 ma is used in Analog Signals?
New Replies:
The point will be argued until 4 - 20 mA is dead and buried. Did anyone mention it was just a...
Originally posted by Vikrant Makwana on 25 September, 2014 - 5:39 am
Voltage, current and power factor (per phase), are acquired every 5 seconds. How accurately, can we calculate energy.
New Replies:
It depends on how steady your load is. If you have a fixed load that doesn't vary e.g. resistive...
Hi It depends on the variability of the load changes. For example a motor that turn on and...
Topic: Continuous process industries, DCS questions.
from the Instrumentation department...
Thermocouple Temperature Drops Suddenly
Originally posted by Litto on 22 September, 2014 - 2:06 am
Unexplained temperature drop while process is running
New Replies:
if grounded t/c's are being used, ground loops between the thermowell locations and its ground path...

Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2014 Nerds in Control, LLC. All rights reserved.

Users of this site are benefiting from open source technologies, including PHP, MySQL and Apache. Be happy.


Fortune
"My life is a soap opera, but who has the rights?"
-- MadameX
Advertise here
Advertisement
our advertisers
Help keep our servers running...
Patronize our advertisers!
Visit our Post Archive