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10.
Modbus setting method
Modbus communication is available on this model. Follow the procedure below to set.
CAUTION
Use insulation type for Modbus devices to be connected.
If it is not an insulation type, it may affect the device due to noise, etc.
1. Wiring method
Outdoor unit
Modbus A line
Modbus B line
Dx-coil interface
Baud Rate *1
SW506
Address *2
SW507
Termination
SW801
resistor *3
* 1: Set the baud rate according to the communication device.
* 2: Up to 16 addresses can be set with the rotary switch.
* 3: Set the terminating resistor only for the unit with the latest address.
SW
Bit
Function Name
1
Modbus baud rate
SW506
2
3
No function
4
No function
Modbus address setting
SW507
1
(RSW)
RS-485 terminating resistance
1
setting
SW801
2
No function
• RS-485 terminator resistor select switch SW801 (Bit1).
• For SW801 Bit1 (120 ohm), Set only the Dx-interface with the latest address, and turn off Bit1 for other Dx-interfaces.
Uv
Uv MdA MdB
Uv MdA MdB
Bit1: ON / Bit2: OFF
(19200)
1
Bit1: ON
OFF
(Default)
Refer to right table
-
-
-
None
-
– 45 –
Note:
When connecting multiple communication lines,
connect MdA-MdA and MdB-MdB to each other.
(There is polarity)
Bit1: ON / Bit2: OFF
...
(19200)
2
...
Bit1: OFF
...
ON
Bit1
OFF
ON
OFF
ON
-
-
Refer to "Modbus setting method" in this
-
Installation Manual.
Can do
Refer to "Modbus setting method" in this
(120 ohm)
Installation Manual.
-
Uv MdA MdB
Bit1: ON / Bit2: OFF
(19200)
16 (Up to 16)
Bit1: OFF
Detail
Bit2
Baud rate
OFF
9600
OFF
19200
ON
38400
ON
57600
-
-
EN
-
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