Hello All- currently using a DO on a 2003 RJ3iB to toggle a rotation table ON/OFF. The various speeds are set manually with a pot and accuracy/repeatability is a problem. So we're upgrading the table with new servo motors that will be set to receive 1-4 digital signals from a PLC . Can the PLC be controlled from the RJ3iB with one hard wire sending variable low voltage? If so, how would this be accomplished? Thanks!
Using DO to communicate with a PLC
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Mark Krohn -
April 19, 2020 at 6:59 AM -
Thread is Unresolved
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This seems like pretty much the same question you already asked in another post.
A DO is only a boolean signal, on or off, true or false, there is no in between.
If you want a numeric value to output you have a few options. Buy an analog output card. Wire up several DO's and set them as a group output, or use a communication protocol to send a numeric register.