Modbus Communication; Modules Wiring Diagram While Using Modbus Protocol (Fig. 6) - LG multi V ARUM Series Installation Manual

5.4 CONTROL / COMMUNICATION MODBUS
In order to control up to 23 modules from the
superior system you
communication as an option to control or monitor the
equipment.
Input/output "MODBUS" (terminals 23+24)
The address for MODBUS communication is set using
the "SETTINGS" button. The setting procedure to be
found in paragraph 6.
PARAMETRY KOMUNIKACE MODBUS
Serial line: 9.6 kbps, 8 bits, no parity, 1 stop bit
Station address: hex91 - hexA7 (default hex91)
Supported functions:
Fig.6 - MODBUS communication wiring diagram
for controlling multiple modules
READING REGISTRIES
Address
Name
(decadically)
VERSION 4096
ERROR 4097
TEMP1 4098
TEMP2 4099
DEFROST 4100
RECORDING REGISTRIES
Address
Name
(decadically)
POWER 4101
FUNCTION 4102
2020/07/23
may use the MODBUS
- 3 (Multi_Read)
- 6 (Single_Write)
- 16 (Multi_Write)
Properties/description
Software version
Errors according to the device's self-diagnostics (see the service manual of the
LG device), (error 99 + Modbus communication error)
Refrigerant input temperature to the exchanger +15 °C (blue sensor, smaller
diameter)
Refrigerant output temperature to the exchanger +15 °C (red sensor, bigger
diameter)
1 = active defrost mode of the outdoor unit
Properties/description
The value of the required power 0 to 7 corresponds with analogue input
Bit 0 0 = cooling; 1 = heating (heat pump)
Power value 0,1,2,3 (this value is used to control the power only if the
Bit 1+2
value in the registry POWER is = 0)
Bit 3 0 = OFF; 1 = ON
Bit 6 1 = RESET
I&C
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