Modbus Control - LG PAHCMW000 Installation Manual

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.
UI3 Input
DHW
Resolution
NOTE
• The input range has a linear output between min and max value.

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
Function Code
0x01
0x02
0x03
0x04
0x05
0x06
0xF1~FF
Exception Code
AI Input
Input Temperature
0 V 0 °C
10 V 100 °C
0.1 V/ °C
Sub Function Function Name
None Read Coil
None Read Discrete Input
None Read Holding
None Read Input
None Write Single Coil
None Write Single Holding
Reserved for
CONTROL
Start Address form Master
Device
Register Address -00001
Register Address -10001
Register Address -40001
Register Address -30001
Register Address -00001
Register Address -40001
17