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Thermal Overload
The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
Fortune
Once, adv.:
Enough.
-- Ambrose Bierce, "The Devil's Dictionary"
Enough.
-- Ambrose Bierce, "The Devil's Dictionary"
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Please let me know briefly about the Temperature sensors and their assemblies, in process control
For a project we have to restore the process loads after power failure. How can i do this
How to improve my steam generator control system.
coriolis type flowmeter . the calibration range is 0-1000GPM (0-2240kg/min) but vendor done up to 2268 kg/min. is it acceptable
New Replies:
By Mark Thomas on 19 October, 2009 - 4:15 pm -
This should not be an issue, you should be able to go into the flow meter and adjust the settings...
Embedded Modbus Slave Response
New Replies:
By criders on 19 October, 2009 - 2:19 pm -
> Yes the order in which you check things matters. There are flow charts and state diagrams in...
By M Griffin on 18 October, 2009 - 9:58 pm -
Yes the order in which you check things matters. There are flow charts and state diagrams in the...
How to change operation between motor, and generator?
Three phase motor's current is imbalance
New Replies:
Roy,
I've checked that with low variable voltage transformer. With its primary being at 220V...
Hi Pot testing of 11kV cable is giving high negative leakage current.
New Replies:
By Phil Corso on 19 October, 2009 - 12:44 pm -
Absolutely necessary. Did you read the two referenced topics?
Phil
...
sorry...took the phrase literally ... anyway, nothing of that sort was done!! Is the process...
By Phil Corso on 18 October, 2009 - 4:55 pm -
Shamyl,... What I meant by "drying-out" was, did you apply current via a low voltage...
The terminations were properly cleaned and left to dry for around 45 minutes before the test was...
By Phil Corso on 16 October, 2009 - 2:54 pm -
Shamyl... did you try drying out insulation prior to testing?
Following are two Control List...
controlling a 220v motor from siemens s5 100 u plc
Water/Gas Meter with Modbus/LonTalk/BACnet Compatibility
New Replies:
Hello Steve,
For your application, I recommend using a Sensus (or Sensus-compatible) water meter...
PE Control Systems Exam 2009
New Replies:
By Malhotra on 18 October, 2009 - 8:10 pm -
Hi Elaine,
Sorry for the late reply. I had almost lost hope that anybody would actually reply to...
how a flow meter communicate
New Replies:
For your application, I recommend using a Sensus water meter and a Sensus gas meter, both of which...
By Steve on 17 October, 2009 - 7:46 pm -
Hi,
I am looking for a water meter and a gas meter that can output Modbus, LonTalk, or BACnet. Do...
Serial interface between Allen Bradley's Control Logix and Emerson Ovation DCS
New Replies:
By Alex Baloch on 18 October, 2009 - 12:22 pm -
Were you able to establish communication between the control logix plc and the ovation DCS? of so,...
allowable pressure drop across control valve
New Replies:
Hi Tushar,
This debate on what might be an allowable pressure drop across a control valve is a...
suggestions wanted about thermal management of the inverter installed in dust environment
New Replies:
By M Griffin on 17 October, 2009 - 2:06 pm -
To add to what Curt Wuollet said, I have also seen large aluminum heat sinks added to the outside...
By curt wuollet on 16 October, 2009 - 10:39 am -
Use a much larger sealed box and enough internal airflow to accomplish the heat transfer through...
How to prepare to install sppa t3000 DCS
Can MicroLogic PLC read Modbus Holding Registers in the 5xxxx range?
New Replies:
By M Griffin on 17 October, 2009 - 1:43 pm -
Thanks to Mark for the correction. It appears that old versions of the Modbus spec did make some...
By Mark on 17 October, 2009 - 2:25 am -
Hello,
What Mr. Griffin said is 99.99999% accurate.
The current specification: MODBUS...
By M Griffin on 16 October, 2009 - 2:17 pm -
To make something clear about Modbus, this 0x, 1x, 3x, 4x, 4 digit, 5 digit stuff has *nothing* to...
The typical Modbus Address Scheme is :
0x = Digital Outputs (Bit)(Read / Write)
1x = Digital...
By Harvard on 15 October, 2009 - 11:31 am -
Try reading Register = 50102-40001 = 10101 = 0x2775...
By Patrick Lansdorf on 15 October, 2009 - 3:02 am -
Hi,
I cannot answer if a MicroLogic PLC can read 5xxxx registers. But if it cannot, I would...
Could someone explain whether variable speed with a single-shaft gas turbine is permitted while the generator is producing power?
New Replies:
CSA,
when you said: "If the fuel is less than required to keep the turbine/generator shaft...
F = (P * N) / 120
F = Frequency
P = Number of poles of generator
N = RPM of generator...
time synchronization in DCS system
New Replies:
By Ketan Lakhani on 17 October, 2009 - 4:29 am -
I feel that it is firstly required to understand as to why the synchronization is required. ...
By Y.K.JARIWALA on 16 October, 2009 - 2:00 am -
We are not very sure , but time synchronization plays very critical role in Multiple Node system we...
jianjian2112,
the target of time synchronization in DCS from GPS that if we have more than one...
Confusion in defining calibration range
New Replies:
By Roy Matson on 16 October, 2009 - 10:55 am -
And if you weren't confused enough before you will be even more confused now after reading all the...
Not all instruments require calibration... PRTs don't need it unless you are being extra fussy...
hi,
just added, range limits are basically an limitation for operating range itself. yes some...
where can I find this?
New Replies:
By Phil Corso on 16 October, 2009 - 10:44 am -
Christina... of course the best data comes from the manufacturer.
If unavailable, then go with...
HP ratings of induction motors
lease describe "TAT Spread Concept In Gas Turbine".
I have come across a specification that states 'motor rotation to be changed at motor end only...
New Replies:
By Tom Chubb on 14 October, 2009 - 10:52 am -
I know it sounds obvious but it's worth noting that you must ensure that maintenance check the...
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