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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
"There is no reason for any individual to have a computer in their
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-- Ken Olson, President of DEC, World Future Society
Convention, 1977
home."
-- Ken Olson, President of DEC, World Future Society
Convention, 1977
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For a project we have to restore the process loads after power failure. How can i do this
New Replies:
By Phil Corso on 20 October, 2009 - 12:39 pm -
Yes, there is! It's called "Reacceleration!"
Regards, Phil Corso (cepsicon [at] aol...
I am helping to design a complete SCADA/telemetry system for a water treatment facility.
How can HC900 communicate with ML50?
New Replies:
By Wassim Daoud on 20 October, 2009 - 11:45 am -
Have you considered about using OPC to transfer the data back and fourth between the factories?...
By Wassim Daoud on 20 October, 2009 - 11:42 am -
Have you thought about using a Small Historian or a Buffer to store the data?
Visit this website...
By Patrick Lansdorf on 20 October, 2009 - 8:41 am -
Hi Keith,
I work for a company that makes gateways, HMS.
To me it sounds as if a gateway...
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 process data on 20 October, 2009 - 10:59 am -
Dear sir
i am giving you my process data
PROCESS DATAS
Fluid- Liquid , Flow normal - 418...
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...
Replacement of ABB Infi 90 DCS controllers, IMMFP12 with new ABB BRC 300 controllers
New Replies:
By Ahmad Robani on 20 October, 2009 - 4:17 am -
Dear Sirs,
We can supply a wide range of ABB Bailey INFI90. Please visit to our website...
Please let me know briefly about the Temperature sensors and their assemblies, in process control
controlling a 220v motor from siemens s5 100 u plc
Need help with PID programming for a SLC/505 PLC?
I have to program a PID to control heating/cooling and would like to get a sample PLC code.
I have to program a PID to control heating/cooling and would like to get a sample PLC code.
ovation regulator logic
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...
How to prepare to install sppa t3000 DCS
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...
we received a coriolis meter from Emerson (F series ) and our calibration range is not matching with received range.
How do governors and load share devices know what level to set?
New Replies:
By Tony Manton on 16 October, 2009 - 4:42 am -
For analogue load share lines, the device connected to the lines is a wheatstone bridge of...
Process of selecting Control Valves & DCS settings
New Replies:
Hi Papaya,
I would like to share information relating to your questions.
Some important...
Minimum opening for Butterfly control valve??
New Replies:
Hi Dasa,
What is the brand of the HPBV (High performance Butterfly valve) that you are using? In...
need help ASAP
How to implement the linearization algorithm in order to support proper flow metering?
New Replies:
What is the flowmeter?
What accuracy is required? ...
Can any one suggest the most suitable instrument for Flow measurement under Gravity flow conditions. The service is Produced Water after Crude Oil Separator.
New Replies:
Cost will vary significantly from one type of meter to another.
You say this isn't very critical...
By Roy Matson on 13 October, 2009 - 3:41 pm -
A mag meter would be my choice. you say the measurement is not critical so the straight runs are...
By Mark Thomas on 13 October, 2009 - 9:33 am -
Remember all Magnetic flow meters require 10-20 pipe diameters upstream and downstream to get a...
Hi,
Few choices would be Variable Area Flowmeter, Electromagnetic Flowmeter, Ultrasonic...
How to read weight from IND 780 using Modbus TCP/IP
New Replies:
I do not have PL7 installed on my computer and am going from memory.
You do not enter 400001...
By Chimwana on 14 October, 2009 - 9:13 am -
Hi
I'm using PL7 Pro when I'm setting my IOscanning I can not input 400001 address as my slave...
It would help if you provide us with the details of which programming software you are using (PL7...
What is 3 element control of boiler drum in HRSG?
New Replies:
By John on 14 October, 2009 - 4:04 pm -
Ben,
I appreciate your post and working in the Chemical industry, feedforward control (or single...
cascade control for temperature control.waste to energy power plant.
New Replies:
Hello,
I really would like to help you but with such a brief description like this it would be...
By Roy Matson on 14 October, 2009 - 10:38 am -
From what you describe it sounds as though the intergral action is not working, what settings do...
By James Fountas on 14 October, 2009 - 8:55 am -
Hi,
Can you forward me a the P&ID of the de-suoperheater section along with steam and water...
By Andy Clegg on 14 October, 2009 - 8:12 am -
Could be one of many things:
- lack of integral action
- controller using one PV and screens...
The two most likely causes are:
1. The output of one of your control loops (i.e. inner or outer...
Push Button Faceplate implementation in Centum CS3000
Unable to access Prosafe-RS tags in CS3000 Control Drawing
I need a brief general manual on PID controllers
New Replies:
By James Fountas on 14 October, 2009 - 9:02 am -
Hi,
The basic theory of PID control can be found in a number of places, but a manual for PID...
By George Buckbee on 14 October, 2009 - 8:48 am -
You can find a few resources online:
ExperTune's tutorial page:
...
Abb station does not get "enter" command
Mk6 rack power supply failure together with VCMI failure.
New Replies:
By Robert Roberts on 13 October, 2009 - 10:37 am -
Since there are 10 individual modules in each of the supplies, the first step is to isolate the...
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