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allen bradley dh485

 
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jms
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allen bradley dh485
PostPosted: Mon Feb 16, 2009 7:15 pm     Reply with quote
is it possible to make a pic communicate to an allen bradley plc with dh485 or rs232c? any info will help.
dyeatman



Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK

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PostPosted: Mon Feb 16, 2009 7:58 pm     Reply with quote
Yes, you can use either protocol but you will need the command set. You use a simple RS232 (null modem) to communicate with SLCs and PLC 5s. Be aware it depends on the configuration loaded (the configuration can disable the RS232 port) so be aware!

The links below have info for the SLC and RX Logix series:

http://plcguide.mrplc.com/
http://www.mrcontrol.fsnet.co.uk/allen-bradley.htm

With the proper cable and PLC programming, for RS232 all you need to use is the internal PIC UART at the proper speed and bit format.
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