AB MSG instruction help
AB MSG instruction help
(OP)
I have a project to add a Micrologix 1200 to an existing SLC 5/03. I have created a DH485 network using a 1747-AIC for the SLC end, and an AIC+ for the ML 1200 end. There is also a PV600 connected at the SLC end. The SLC I/O is 120vac and the ML1200 is 24VDC. At the initial installation ice cube relays were installed in the SLC cabinet to bring inputs from the ML1200 to the SLC. My boss wants these relays eliminated, and the signals put on the network. I have read many posts about the MSG instruction, and have read AB's documentation until my eyes bleed but I don't seem to be getting it right. Can anyone walk me through an example that I can use to get my mind around this ?





RE: AB MSG instruction help
http://
RE: AB MSG instruction help
Are any of the hardwired signals carrying signals critical to safety, e.g. interlocking, overrides, etc? If they are then I would suggest caution before committing them to a PLC data link, although I would equally not expect them running on a general purpose PLC.
jde,
Thanks for the link
RE: AB MSG instruction help
RE: AB MSG instruction help