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LG PI-485 protocol

Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Literature
Document revisions

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Supported device types and versions

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I/O tag configuration

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Possible I/O tag types: Ai, Ao, Ci, Co, Di, Dout, Qi

The address of the I/O tag is textual. The following table shows a list of existing addresses:

AddressI/O tag typeDescription
LOCK_REMOTE
Di, Dout
Dout

Set the remote controller functionality: Lock (1) / Unlock (0).

LOCK_REMOTE_RDDi

Get

Get/set

the remote controller functionality: Lock (1) / Unlock (0).

OPERATE_OUTPUT
Di, Dout
Dout

Set the device functionality: the device is stopped (0) / working (1).

OPERATE_OUTPUT_RDDi

Get

Get/set

the device functionality: the device is stopped (0) / working (1).

OPERATE_DHWDout

Set the domestic hot water heating in the built-in boiler: disabled (0) / enabled (1).

OPERATE_DHW_RDDi
, Dout

Get

/set

the domestic hot water heating in the built-in boiler: disabled (0) / enabled (1).

OPERATE_MODEAo

Set the mode of operation: 0=cooling, 1=dehumidification, 2=ventilation, 3=auto, 4=heating.
Note: for a heat pump, modes 0, 3, 4 are relevant.

OPERATE_MODE_RDAi
, Ao

Get

/set the

the mode of operation: 0=cooling, 1=dehumidification, 2=ventilation, 3=auto, 4=heating.
Note: for a heat pump, modes 0, 3, 4 are relevant.

TEMP_OUTPUT_SPAo

Set the desired outlet water temperature.

TEMP_OUTPUT_RDAi
, Ao

Get

/set

the desired outlet water temperature.

TEMP_DHW_SPAo

Set the desired temperature of the domestic water in the built-in boiler.

TEMP_DHW_RDAi
, Ao

Get

/set

the desired temperature of the domestic water in the built-in boiler.

TEMP_WATER_INAiCurrent inlet water temperature.
TEMP_WATER_OUTAiCurrent outlet water temperature.
TEMP_ROOMAi

Current room temperature (external sensor connectable to the indoor heat pump unit).

TEMP_TANKAi
Current
The current temperature of the domestic water in the built-in boiler.
TEMP_SOLARAi
Current
The current temperature of an optional external solar system (if connected).
CONNECTED_IDUDiThe indoor unit is connected (1) or disconnected (0).
TGT_TEMP_SELDi
Current

The current setpoint is the temperature of air TEMP_ROOM (0) or water TEMP_OUTPUT_SP (1).

Note: Temperatures are integer numbers (°C).

Note: it takes longer to set the values (approx. 12 seconds).
Example: TEMP_OUTPUT_SP has a value of 40 °C. After writing a value of 42, a reading follows which changes the value back to 40. Only only after approx. 12 seconds does the value of the I/O tag TEMP_OUTPUT_RD change to 42.

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Literature

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