LG PACS4B000 Installation & Owner's Manual page 20

12
PREPARATION
AC Smart IV
NOTES
The maximum allowed communication distance guaranteed by LG Electronics is 1 000 m. It
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means that the distance between AC Smart IV and the farthest device should not exceed 1
000 m. It is recommended that the communication cable use 0.75 mm square or more.
For indoor units, ERV, DI/DOs, DOKITs, AWHPs, AHUs and I/O Modules, you cannot allocate
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identical addresses among devices of the same type. Allocate different addresses for devices
of the same type. (the indoor unit and DOKIT cannot use the same address.)
Each device which can be used with PDI must be set to a unique address when connected
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with PDI. For further information about the devices can be used with PDI, please refer to the
PDI manual.
Connecting I/O Module, address setting should not be 00 because 00 is used to Broadcast in
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MODBUS communication.
Power Distribution
watt-hour meter
Indicator (PDI)
Outdoor Units
Indoor devices 1
Configuration
Address: 01
ERV
Configuration
Address: 11
DI/DO, DOKIT
Configuration
Address: 21
...
AWHP
AHU
Indoor devices 2 Indoor devices 3
Configuration
Address: 02
Configuration
Address: 31
Configuration
Address: 41
Configuration
Address: 03