10
10.4 Modbus
Transmission rate: 9600 bps; Data length: 8 bits; Stop bit: 1 bit;
Check bit: no check; Transmission code: hexadecimal value (MODBUS RTU mode);
Error detection: CRC-16 (MODBUS RTU mode);
MODBUS communication IP address of slave unit: 1-32;
Command = 03: Multi-register read instruction; Command = 06: Single register write
instruction;
Command = 16: Multi-register write instruction.
Parameter
Code
Parameter
Name
Parameter Range
Default
Value
Remarks
00
00: 0 second
05: 5 seconds
10: 10 seconds
15: 15 seconds
30: 30 seconds
60: 60 seconds
90: 90 seconds
Duration of preventing
cold wind
C14
Read only
Version
C15
Command
Parameter Name
Parameter Range
0
4
1~255
Celsius: -50~500; Fahrenheit: 23~122
17°~30°C / 41°F~95°F
Room temperature
03
1
2
3
4
5
6
03
03/06/16
03/06/16
03/06/16
03/06/16
Current ON/OFF mode
Current setting
temperature
System mode setting
Set fan speed
0: OFF; 1: ON
1: Low; 2: Medium; 3: High; 4: Auto
Register
Address
Default
Value
Thermostat program
version No.
0: Ventilation; 1: Cooling; 2: Heating;
3: Auxiliary electric heater;
4: H Auxiliary electric heater