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'[PIC] PIC and Wonderware'
Mark Scoville says:
>Overall I wouldn't say my experience was a pain at all - it went
>pretty smooth for me.
It wasn't difficult once I figured it out, it was just hard finding
free information. IIRC, the modbus spec was the ONLY free info I
found on the web. No one would share any info unless you paid them
for it. I posted requests for info on the Microchip and Hi-Tech
forums, and the only responses I got were, "I'm having problems
finding info also." (This was before I found PICLIST.) Part of the
problem is that what I thought was a well-defined standard was really
a de facto standard that everyone implemented a little differently
based on their requirements. I just checked the latest Modbus spec
(June 4, 2004), and it is more thorough than the one I remember.
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