Actually, now that I think about it, I don't think you would even have to implement a custom protocol.? I haven't used them in a while, but there used to be symbols that worked like EISC's that would work over serial com ports, back when master-to-master communication had to be performed over com ports like this.? If you used something like that, it would work similar to a regular EISC symbol, with digitals/analogs/serials, and it just packs it in and sends over com port to a receiving symbol on the far side.? No custom protocol required.
Jason Mussetter
www.mpsav.com
