[foxboro] A Non I/A Query
- From: Ajay.Tathgir@xxxxxxx
- To: foxboro@xxxxxxxxxxxxx
- Date: Wed, 25 Aug 2004 09:05:16 +0530
Is there a fundamental difference in the way which the OS of DCS & PLC's
process the user programs.
PLC's - What i think i know
- Scan the inputs, and write into Process Input Image
- Process, execute user programs
- Write down the outputs into Process Output Image
-----------Original Question----------------
Hi! All
I got a ludicrous question here folks. Though it has nothing to do with
I/A, but this forum has some of the best brains around to put the answer to
a query like this one, in right words.
- Today we all know that any PLC can do PID control, any DCS can do ladder,
- But still we all know that there are applications where we won't use DCS,
and there are applications where we won't use PLC.
Why ???
I will summarize...
Thanks & Regards
Ajay Tathgir
Reliance Industries Limited
Mumbai - India
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