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Process Control
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
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...
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: 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: 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...
When I began in the power industry several years back there were two commonly utilized current...
>> Why 4-20 ma is used in Analog Signals? >> How come ISA selected this. Why not...
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...
If your getting any kind of moisture or water that can cause wrong readings also....
I agree with the suggestion of a short between the + and - wires somewhere. It could even be a...
If you get a high mV reading across the thermocouple wires, then - moving the wires to make the...
but if its the problem with cable or element, would i get milli volt corresponding to 950 or 900 on...
A drop to 100 is indicative of a short creating a false junction. A drop to zero is indicative...
If you are dealing with 950C as opposed to 950F, it could be a problem with the thermowell or the...
Somewhere between the hot junction and the analog input there's a short circuit in the extension...
Topic: Engineering and workplace issues.
from the Forum department...
DCS analog input problem
Originally posted by mahmoud fawzy on 4 September, 2014 - 7:10 pm
DCS Analog input signals didn't work with ADAM card
New Replies:
I just want to comment that this is a great thread to follow. I enjoyed reading the dialog very...
Mr. Fawzy, That's a very interesting observation. A common for all channels is what allows...
Hi David, I got one information form yokogawa training material that last number in AI/AO cards...
Hi, David >Given the nature of what you've reported thus far, I can't predict > what will...
Given the nature of what you've reported thus far, I can't predict what will happen if you connect...
Topic: Power generation equipment control.
from the Operations department...
9FA Gas Turbine Unloading Rate
Originally posted by Stephen Roche on 6 September, 2014 - 3:17 pm
GE 9FA unloading rate in auto stop sequence for multishaft unit.
New Replies:
Steve Roche, Great news! Thanks for the feedback!...
We have the problem solved, when the ST breaker opens the ST latched a trip status. The trip played...
Topic: PLCs and related questions.
from the Forum department...
Synchronizing Two ABB DCS Controllers
Posted by haroon0023 on 23 September, 2014 - 3:47 am
One type of status reading of ABB DCS says they are Synchronized, but other says they are 35% in Synchronized.
Posted by Beavis Cleavis on 19 September, 2014 - 1:07 pm
Bus contains isolated and non-isolated slaves. Considerations when connecting everything together?
Topic: Continuous process industries, DCS questions.
from the Forum department...
WDFP QLC Card Download
Posted by Kevin Williams on 18 September, 2014 - 12:27 pm
Problem downloading to QLC card with LC Loader
Topic: PLCs and related questions.
from the Forum department...
Upgrading Yokogawa CS3000 R3 DCS
Posted by Khalid Ur Rehman on 16 September, 2014 - 12:36 pm
Our existing DCS is only compliant with Windows XP HMI's having Vnet communication. What is the best way to upgrade the system for compliance with Windows-7 and having Vnet/IP communication?
Topic: Engineering and workplace issues.
from the Calibration department...
Rosemount 3051 Calibration
Originally posted by josh0206 on 22 June, 2014 - 3:39 pm
Rosemount 3051 Calibration
New Replies:
Yes. 12-117 in wc....
So if I go through the zero suppression that would be like me rearranging it from 0-105" H20...
Topic: Communications systems and equipment.
from the Forum department...
TDC 3000 Remote Station Hanging
Posted by Jiftim on 12 September, 2014 - 2:15 pm
Remote Honeywell ES-T hangs with the RPS kit. Is it possible to extend the LCN using fiber without using obsolete Honeywell equipment?
Topic: Sensor technologies.
from the Instrumentation department...
ABB Flowmeter -Flow Data Is Less
Originally posted by sandeep on 11 September, 2014 - 6:27 am
flow meter data is less compared to other flowmeters
New Replies:
what are the units for the 20 mA value? how long does it take for the 1 meter level change?...
>> "flow meter data is less compared to other flowmeters" >other flowmeters? ...
> 1) Is this a new installation or a new problem with an existing, previously satisfactory...
> "flow meter data is less compared to other flowmeters" other flowmeters? ...
1) Is this a new installation or a new problem with an existing, previously satisfactory...
Topic: Sensor technologies.
from the instrument department...
Level Transmitter on Condensate Drum
Originally posted by rosemount on 10 September, 2014 - 2:20 pm
Erratic reading for level transmitter on condensate drum
New Replies:
You are really not giving much for us to work with so if the assumption I am making is wrong it is...
There's nothing wrong with the transmitter, it's accurately reporting exactly what's happening -...
to address your question with any meaning, you need to furnish the detailed vessel drawings, and...
Topic: Continuous process industries, DCS questions.
from the Forum department...
How To Read an Instrument Loop Diagram
Originally posted by Rama on 10 September, 2014 - 5:57 am
Understanding an instrument loop diagram
New Replies:
you physically inspect the IOP, and walk the planned wire routing. reading is usually not required....
Topic: Continuous process industries, DCS questions.
from the PID Control department...
PID Control In an Elevator
Posted by Blackbird307 on 10 September, 2014 - 12:53 am
How can a PID or PI be used in an application involving elevators with a pulley?
Topic: Continuous process industries, DCS questions.
from the Instrumentation and Control department...
Temperature Transmitter
Originally posted by Kamaraj on 8 September, 2014 - 7:11 am
How can we test a Temperature Transmitter Accuracy?
New Replies:
I presume the first simulation is Prova 123 K T/C output to temp transmitter. It isn't clear...
Posted by Yayati Sule on 9 September, 2014 - 3:24 pm
Use of Programming languages in Automation.
Originally posted by vpsopm on 5 September, 2014 - 1:48 pm
2+1 CC GTs both tripped and Steam Turbine was still synchronised on grid producing 30 MW!
New Replies:
otised makes a great point about decreasing steam temperature....
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