Daikin BRR9B1V1, Руководство по установке

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8 | Configuration
Installation manual
25
BRR9B1V1
Communication box
4P617761-1 – 2020.04
Setting
DS1 pin 2: ON 19200 bps
Modbus communication parity/stop bit
Setting
DS1 pin 3: OFF, pin 4: OFF Even 1 stop bit
DS1 pin 3: OFF, pin 4: ON Odd 1 stop bit
DS1 pin 3: ON, pin 4: OFF None 2 stop bits
DS1 pin 3: ON, pin 4: ON None 1 stop bit
Modbus slave address setting
Setting
DS2 pin 1/2/3/4 When Modbus address is set (e.g. 1, ….,
15), then Modbus RS‑485 is enabled.
OFF/OFF/OFF/OFF No Modbus address is set, this means
no Modbus RS‑485 communication.
OFF/OFF/OFF/ON
OFF/OFF/ON/OFF
…
ON/ON/ON/ON
Address 1
Address 2
…
Address 15
1 2 3 4 1 2 3 4
DS1 DS2
ON
OFF
DS1 Switch 2 = baud rate.
DS1 Switch 3+4 = parity stop bits.
DS2 Switch 1~4 = Modbus slave address.
CAUTION: Precautions when setting the slave address
▪
Do NOT set the same slave address for devices connected to the Modbus master
device.
▪
Apart from the slave address set in the communication box, there are 2 other
slave addresses that cannot be set. When the slave address on the PCB for the
outdoor unit (A2P) is set to "A", slave addresses "A+1" and "A+2" CANNOT be set.
Slave address "A" is used for the outdoor unit, "A+1" is used for the capacity up
unit, and "A+2" may NOT be used.
b
a
c
a Modbus master device
b Communication box 1
c Communication box 2
8‒1 Settings for slave address for communication box 1
PCB A1P A2P
Address set 1 2