PLC Archive:DH-485 Communications

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DH-485 Communications

contributed by: Joe Jansen

Link to File

Click here to view program file.


This is a code fragment that I use for doing DH-485 comms between processors. The MSG instructions are cascaded to allow the fastest possible updates without worrying about a having failed MSG's clog up the channels and stop / slow down the rest of the MSG's to other machines. This is on a small (4 node) production line, but it could scale to whatever amount needed. Note that on larger networks, it may be better to keep two or three loops going at once.


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