Check Points During The Acp Bacnet Installation - LG PQNFB17C0 Installation & Owner's Manual

Check points during the ACP BACnet installation

• The number of PI485 connected to one RS-485 communication line
- ACP BACnet provides 4 RS-485 ports for indoor unit connection. (CH 1~4)
- Up to 16 PI485 for outdoor unit can be connected to one RS-485 port, and up to 31 PI485 for
SINGLE/ERV can be connected.
• The number of the indoor units that can be connected to one ACP BACnet
(ACS I/O Interlocking is available on version 4.0.0 or later.)
One ACP BACnet can be connected up to 256 indoor units. With ACS I/O interlocking, you
can connect 128 indoor units and 16 I/O modules. To one RS-485 port, all of 256 indoor units,
which is the maximum number that can be connected to the ACP BACnet, may be connected
but communication latency will increase. But, to improve the communication performance of
RS-485, it is recommended to be divided and connected to 4 ports.
The maximum quantity of connected indoor unit is different depending on the quantity of
connected I/O modules.
Quantity of
Device
256
128
* Devices: Indoor units, ERV, DI/DOs, DOKITs, AWHPs, AHUs
16
Quantity of I/O Module
INSTALLING ACP BACnet
Quantity of I/ Quantity of
O Module Device
0 256
1 248
2 240
3 232
4 224
5 216
6 208
7 200
8 192
9 184
10 176
11 168
12 160
13 152
14 144
15 136
16 128
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