148
MODBUS registers
10.3 States of units in cascade
Address
register
Meaning Description
1000 Operation mode Operation mode, 2: cool, 3: heat; 0: OFF
1001 Comp. Frequ. Comp.freq., unit: Hz, (value read = current value)
1002 Twi TW_in, unit:°C entering water temperature; (value read = current value)
1003 Two TW_out, unit:°C leaving water temperature; (value read = current value)
1004 Tsolar Tsolar, unit:°C solar temperature; (value read = current value)
1005 Save unit error code Specific error code, refer to the code table.
1006 P6 error Reserved
1007 IDU state 1
Bit3~7 Reserved
Bit2 Oil return
Bit1 Antifreeze
Bit0 Defrosting
1008 IDU status 2
Reserved
Reserved
Reserved
Reserved
Bit4 T1 leaving water temperature; 1- enabled; 0- disabled
Bit3 IBH backup system electric heater; 1- enabled; 0- disabled
Bit2 DHW
Bit1 Heat
Bit0 Cool
1009 IDU load
Bit7 HEAT 4 compressor heater 1- on; 0- o
Reserved
Bit5 Defrosting 1- on; 0- o
Bit4 RUN 1- on; 0- o
Bit3 PUMP_I 1- on; 0- o
Reserved
Bit1 IBH2 = 1- on; 0- o
Bit0 IBH1 = 1- on; 0- o
1010
IDU load output -
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
1011 T1 Total leaving water, unit:°C, (value read = current value);invalid: 0x7F
1012 T1B
Total leaving water (after additional heat source), unit:°C. (value read =
current value); invalid: 0x7F
1013 T2
Refrigerant liquid temperature, unit:°C. (value read = current value);
invalid: 0x7F
1014 T2B
Refrigerant gas temperature, unit:°C. (value read = current value); invalid:
0x7F
1015 T5
Storage tank temperature, unit:°C. (value read = current value); invalid:
0x7F
1016 Ta Indoor air temperature, unit:°C. (value read = current value); invalid: 0x7F
1017 Tbt1
Inertial storage tank temperature, unit:°C. (value read = current value);
invalid: 0x7F
1018 Tbt2
Additional storage tank temperature, unit:°C. (value read = current value);
invalid: 0x7F
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