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PRODUCT MANUAL - BARIX X8 - V01.05 - 10/26/2006
The command code 69 (hex 45) is used to set a BARIX X8 device
which is connected to the bus and whose address is unknown
(but serial parameters are correct).
The command can also be sent multiple times with different serial
parameters to find the device. The serial number of the device,
which can be found on a label on the unit (format xxx-yyy), needs
to be inserted into this block to address a specific unit. The block
is sent out as a Modbus broadcast.
Bytes 272, 273, 274, 275 of the Modbus register map
(configuration memory positions 16..19) will be written with the
provided information if the serial number matches.
Command format:
Byte 1
- 0x0
(broadcast address)
Byte 2
- 0x45
(command code)
Byte 3
- s1
(serial number, first part)
Byte 4
- s2
(serial number, second part)
Byte 5
- s1
(serial number, first part, repeated)
Byte 6
- s2
(serial number, second part, repeated)
Byte 7
- c1
(configuration data for register 272)
Byte 8
- c2
(configuration data for register 273)
Byte 9
- c3
(configuration data for register 274)
Byte 10 - c4
(configuration data for register 275)
Byte 11 - crc1
(crc1 according to Modbus spec)
Byte 12 - crc2
(crc2 according to Modbus spec)
Despite the broadcast addressing, the unit will respond with an
acknowledge (containing bytes 1..6 plus crc) !
The command code 70 (hex 46) is used to set an BARIX X8
output without a return acknowledgment. The command uses the
exact syntax of the 05 (set coil) command, but the BARIX X8
does not send an answer and is immediately ready to receive the
next message. The command should be sent addressed to the
device address and NOT as a broadcast, otherwise all BARIX X8
units on the bus will react to it.
This command has been added to the BARIX X8 to allow slow
systems, which are not Modbus native and cannot react fast to
serial input (like common home automation systems) to set a
series of outputs of one or multiple BARIX X8 units without the
need to observe Modbus message timeouts, answers etc.
Protocol support · 9
Command 70
Command 69