Debunking the Control Architectures
Debunking the Control Architectures
(OP)
Can anyone point me to a good reference that describes and debunks the various architectures currently in use for control systems. In particular, I am interesting in learning more about the following:
1. Analog (4-20ma) and Discrete IO versus
2. ModBus TCP/IP versus
3. Profibus, versus
4. Foundation Fieldbus (H1 and HSE)
I believe that an overview comparing each, pros/cons, etc. would be of great benefit to more than just myself.
I have visited modbus.org and frankly, the information there is too detailed. FF does a better job of describing itself.
Thanks for any help.
1. Analog (4-20ma) and Discrete IO versus
2. ModBus TCP/IP versus
3. Profibus, versus
4. Foundation Fieldbus (H1 and HSE)
I believe that an overview comparing each, pros/cons, etc. would be of great benefit to more than just myself.
I have visited modbus.org and frankly, the information there is too detailed. FF does a better job of describing itself.
Thanks for any help.





RE: Debunking the Control Architectures
Stop at: http://www.easydeltav.com/aboutdeltav/index.asp
and read few lines about the Fisher-Rosemount Delta-V system.
Then you can go to:
http://www.easydeltav.com/video/product/index.asp
and watch some videos online (each about 5 min.)
Think it will give you some idea.
You can also stop at www.smar.com and look for the systems explained there.
Think the easyest way is to contact the agent of one of those companies and ask them to try and convince you to buy thier product after explaining it.
RE: Debunking the Control Architectures
expose while ridiculing; especially of pretentious or false claims and ideas; "The physicist debunked the psychic's claims"
Do you really mean "debunks" ?
RE: Debunking the Control Architectures
Perhaps Debunk is a harsh word. But I am really trying to understand which ones merit investigation and which ones are just "piling on".
RE: Debunking the Control Architectures
Be careful of what you see at www.easydeltav.com.
I have installed several instrumentation networks (on DeltaV too), and it is NOT that easy. Their claims, just like any salesrep's, are not as they seem.
For example, they claim that commissioning one instrument is reduced from 1 hour to a few minutes (15 I think in their propaganda). Complete rubbish! Same goes for thier claim to reduce Engineering time. Garbage.
If you decide to install an instrumentation system at a plant, be sure that the plant has the personnel to maintain it. It is much more difficult than a standard 4-20mA system to troubleshoot for many maintenance personnel. Even with training. But it is nice to have reduced cabinet space and less wiring(if done correctly).
After installing several networks, I still recommend standard HART for most plants.
RE: Debunking the Control Architectures
John
RE: Debunking the Control Architectures
Appreciate the input.
Bob
RE: Debunking the Control Architectures