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- PC reliability?
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- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
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Posts from...
Tuesday, October 7, 2008
How to calibrate any SMART transmitters without using HART communicator?
New Replies:
By V_Vendetta on 7 October, 2008 - 10:49 pm -
By V_Vendetta on 7 October, 2008 - 10:49 pm -
The majority of SMART transmitters installed in plant nowadays are HART enabled. Either you use a...
Selection of IS or non-IS cable to wire up devices.
PID with heating and cooling output
New Replies:
By Roy Matson on 7 October, 2008 - 7:15 pm -
By Roy Matson on 7 October, 2008 - 7:15 pm -
You may need some deadband to avoid cycling.
For example, if you set up your controller output 0...
By Robert Scott on 7 October, 2008 - 9:21 am - You are correct that a straightforward PID implementation could certainly jump between heating and...
By Rob on 7 October, 2008 - 1:26 am - I think I've seen a similar question already today. :) The usual approach is to use a single PID...
I would like to get the reading of a weighing scale on any controller/PLC.
New Replies:
By Roy Matson on 7 October, 2008 - 6:58 pm -
By Roy Matson on 7 October, 2008 - 6:58 pm -
It's hard to help you unless we know:
The make & model of the scale
The make & model of...
Trouble selecting and finding a local flow indicator.
New Replies:
By Roy Matson on 7 October, 2008 - 6:52 pm -
By Roy Matson on 7 October, 2008 - 6:52 pm -
You could also make your own manometer style gauge with a scale marked off in engineering units....
What makes an electrical schematic a standard one?
New Replies:
By James Ingraham on 7 October, 2008 - 5:25 pm -
By James Ingraham on 7 October, 2008 - 5:25 pm -
The wonderful thing about standards is that there are so many to choose from...
IEC does not...
Ethernet & TCP/IP
New Replies:
By James Ingraham on 7 October, 2008 - 5:18 pm -
By James Ingraham on 7 October, 2008 - 5:18 pm -
Sumit: "I'd like to know how to implement Ethernet TCP... I am working with a dsPIC18f series...
DCS wet/dry digital output module application
New Replies:
By Ranjan Acharya on 7 October, 2008 - 4:03 pm -
By Ranjan Acharya on 7 October, 2008 - 4:03 pm -
I was going to write a detailed reply, but it has already been covered - just use the search.
...
By samx on 7 October, 2008 - 1:52 pm - Hi Roy,
Thanks for replying so fast, but there is no mercury. It's wet, that means with power....
By Arnie Minear on 7 October, 2008 - 11:56 am - Roy,
Wet or dry is a common term to describe whether the output module provides the power (wet)...
By Rob on 7 October, 2008 - 12:43 am - Wet means the PLC digital output supplies power when the contact is closed. Dry means you need an...
Pros and cons between ControlLogix and Quantum
New Replies:
By Ranjan Acharya on 7 October, 2008 - 4:00 pm -
By Ranjan Acharya on 7 October, 2008 - 4:00 pm -
Follow the path of least resistance.
I would upgrade the PLC-5s to ControlLogix. The TIs can be...
By Robert Willis on 7 October, 2008 - 1:32 am - James, your information about which of the original Modicon Quantum controllers can be FIELD...
I am trying to clear a fault from a old industrial PLC that has an OEM program that I do not have the software to troubleshoot. The OEM is a German company and will offer no support other than to replace the processor with a new one.
I need a good pressure switch.
How do I calculate the average value of the wind direction when 0° and 360° are the same?
New Replies:
By Bijay on 7 October, 2008 - 1:14 pm -
By Bijay on 7 October, 2008 - 1:14 pm -
I am working on the effectiveness of windbreaks, and accurate wind direction is very important to...
I need to upgrade Paragon 550 implementation controling a chemical reactor.
New Replies:
By KMiller on 7 October, 2008 - 12:56 pm -
By KMiller on 7 October, 2008 - 12:56 pm -
I currently use Paragon TNT in Windows XP and 2K. The software is adequate, however there seems to...
fire alarm system with low cost PLC and a smoke detector...
New Replies:
By mark on 7 October, 2008 - 8:55 am -
By mark on 7 October, 2008 - 8:55 am -
Hello,
I mean in the cost of 200 dollars for the PLC and I want to program it myself to send...
Looking for 230VAC to 24VDC power supply in Zone 1.
What is the effect of closed purge air valves VA33-1 and VA33-2 on gas turbine running on fuel gas?
To start in embedded systems
New Replies:
By Narsing Rao on 7 October, 2008 - 5:50 am -
By Narsing Rao on 7 October, 2008 - 5:50 am -
I would be grateful if any one answered Mr. Arvind Kumar's request.
Thanks,
Narsing Rao
...
Difference between Electronics, Microelectronics & Nanoelectronics
How to backup a program on Industrial PC?
New Replies:
By Rob on 7 October, 2008 - 2:00 am -
By Rob on 7 October, 2008 - 2:00 am -
Well, this is really a Windows question rather than a Control question. The answer is "it...
I have a question about unequal load sharing of generators.
New Replies:
By Ni10 on 7 October, 2008 - 1:14 am -
By Ni10 on 7 October, 2008 - 1:14 am -
Dear all,
If you can suggest some good reference material on governors and their response...
Autotuning PID
New Replies:
By Rob on 7 October, 2008 - 1:07 am -
By Rob on 7 October, 2008 - 1:07 am -
There are lots of ways you can tune a control loop. The "best" tuning method is one which...
from the Control eng department...
Choosing a Distributed Control System for the Crude Oil and Natural Gas Extraction PlantDCS selection, SIS, Modbus, Profibus
New Replies:
By V_Vendetta on 7 October, 2008 - 12:39 am -
By V_Vendetta on 7 October, 2008 - 12:39 am -
I am currently working with Murphy Oil, and we are currently have an on-going project of a Natural...
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