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| == Modbus Control commands for R6 extension module: ==
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| This commands give you the possibility to control the relays on a R6 extension module via a modbus command send as a hex-file in a tcp stack.
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| It is easy to connect the R6 extension module to the RS485 interface of a Barix device. You have to wire Pin6 (A) and Pin9 (B) of the DB9 connector to Pin2 (A) and Pin3 (B) of the J1 connector on the R6 extension module.
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| Additional you have to power up the R6 extension module on Pin4 (+) and Pin5 (-) on J1 connector with an external power supply.
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| The serial settings for the RS485 interface (Serial 2) should set to a baudrate of 19200 Bd, a data bitrate of 8 bits, parity set to even, 1 stopbit, handshake set to RS485 direction control and local port to 502.
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| Now it is possible to send a hex-file, which includes the modbus command, via tcp to port 502 of the Barix device. This can be done with the NetCat Application (nc ''ip-barix'' ''port'' < ''filename'').
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| The table shows the modbus commands to control the relays on a R6 extension module:
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| {| class="wikitable" style="text-align:center" border="1" cellpadding="2"
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| ! !! !! Modbus Address !! Single Coil !! Address HI !! Address LO !! Values HI !! Values LO !! CRC LO !! CRC HI
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| ! rowspan="2"| Relay 1
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| | Set || 00 || 05 || 00 || 00 || FF || FF || CD || AB
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| |-
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| | Reset || 00 || 05 || 00 || 00 || 00 || 00 || CC || 1B
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| ! rowspan="2"| Relay 2
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| | Set || 00 || 05 || 00 || 01 || FF || FF || 9C || 6B
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| |-
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| | Reset || 00 || 05 || 00 || 01 || 00 || 00 || 9D || DB
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| ! rowspan="2"| Relay 3
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| | Set || 00 || 05 || 00 || 02 || FF || FF || 6C || 6B
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| |-
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| | Reset || 00 || 05 || 00 || 02 || 00 || 00 || 6D || DB
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| ! rowspan="2"| Relay 4
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| | Set || 00 || 05 || 00 || 03 || FF || FF || 3D || AB
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| |-
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| | Reset || 00 || 05 || 00 || 03 || 00 || 00 || 3C || 1B
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| ! rowspan="2"| Relay 5
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| | Set || 00 || 05 || 00 || 04 || FF || FF || 8C || 6A
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| | Reset || 00 || 05 || 00 || 04 || 00 || 00 || 8D || DA
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| ! rowspan="2"| Relay 6
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| | Set || 00 || 05 || 00 || 05 || FF || FF || DD || AA
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| | Reset || 00 || 05 || 00 || 05 || 00 || 00 || DC || 1A
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| |-
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| |}
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| Please note: It is necessary to calculate a crc-check-sum for each command and add it to the command itself.
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| Here you can find a online crc-calculator:
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| [http://www.lammertbies.nl/comm/info/crc-calculation.html http://www.lammertbies.nl/comm/info/crc-calculation.html]
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