LG PAHCMW000, Installation Manual

Page: 17 / 19

CONTROL
17
ENGLISH
DHW Temperature Analogue Input
When used for DHW you must connect a 0-10V temperature transmitter to send the water
temperature from the DHW tank to the LG communication module. The set point can be given by
remote controller. AI or Modbus, The range and temperature of the input can be found below.
Modbus Control
When SW1-2 is turned to ON it is possible to control the unit by Modbus RTU using the Modbus
registers below.
h
ODU must be set up for 9600Bps transmission speed to be able to get all data by Modbus.
- Physical Layer: RS-485 Serial Line
- Mode: Modbus RTU Mode
- Baud Rate: 9600Bps
- Parity: None Parity
- 1 Stop Bit
- Frame Length 8 Bit
The Modbus RTU slave address can be set up with wired remote controller
- Setting 3 seconds push > Input passcode (sw version). Installer Menu > Central Controller
Address (HEX)
- Applied Function Code
NOTE
• The input range has a linear output between min and max value.
Function Code Sub Function Function Name
Start Address form Master
Device
0x01 None Read Coil Register Address -00001
0x02 None Read Discrete Input Register Address -10001
0x03 None Read Holding Register Address -40001
0x04 None Read Input Register Address -30001
0x05 None Write Single Coil Register Address -00001
0x06 None Write Single Holding Register Address -40001
0xF1~FF
Reserved for
Exception Code
UI3 Input
AI Input
Input Temperature
DHW
0 V 0 °C
10 V 100 °C
Resolution 0.1 V/ °C