How to map DI's 7 DO's?

[BIGEYE 1]

We have a number of SLC5/04 PLC's networked over DH+. If I have a digital input to say PLC 1, how could I network this and pick it up as an output on PLC 3.

[Mickey 71]

You can use a message instruction to read or write the status of that digital input to or from the PLC's. E.G use message instruction in PLC 3 to read the status of the digital input in PLC 1. Or you could use the "Global Staus Words" to communicate the status of that digital input. See pdf. GlobalStatusWord_SLC.pdf

[BIGEYE 1]

Thanks, not too familiar with message instructions.

[Mickey 71]

See link to the instruction set if you need it. Chapter 12 http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1747-rm001_-en-p.pdf Edited 21 Aug 2014 by Mickey

[BIGEYE 1]

Thanks for that.