adccommunitymod (AutomationDirect) asked a question.
Created Date: July 30,2012
Created By: jparker
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I have a project for which I have 4 RFID readers coupled to a Click PLC's RS485 port 3. This Plc is daisy chained to another with 4 more RFID readers and then Daisy chained again to a 3rd with 1 RFID reader. These readers read the number of the RFID tag on various devices. Tags are numbered 1 thru 12 each reader is on a test stand which has its own control system, A DL 205. I need to handshake the Click with the DL 205 so if a tag number is seen by the reader 8 times, it will not let the test stand operate. Problem is the DL205 system has only 4 available inputs. There has to be some creative way to be able to program the value of the 12 tags thru 1 wire to 1 input on the 205 system. I thought of using a counter on the Click and then monitoring the # of counts on an input on the 205. Seems there should be an easier way. Looking for any ideas. Thanks
Created Date: July 30,2012
Created by: Bob S BN
While i don't quite understand where the "inputs " are coming from, you could perhaps use your 4 available inputs in a binary fashion. You could then create up to 16 seperate values (0-15).
Created Date: July 30,2012
Created by: jparker
I have a project for which I have 4 RFID readers coupled to a Click PLC's RS485 port 3. This Plc is daisy chained to another with 4 more RFID readers and then Daisy chained again to a 3rd with 1 RFID reader. These readers read the number of the RFID tag on various devices. Tags are numbered 1 thru 12
each reader is on a test stand which has its own control system, A DL 205.
I need to handshake the Click with the DL 205 so if a tag number is seen by the reader 8 times, it will not let the test stand operate. Problem is the DL205 system has only 4 available inputs.
There has to be some creative way to be able to program the value of the 12 tags thru 1 wire to 1 input on the 205 system. I thought of using a counter on the Click and then monitoring the # of counts on an input on the 205. Seems there should be an easier way.
Looking for any ideas. Thanks