Table 1: Address mapping table of register in fan coil
The following addresses can be used: 03H
DŽ
04H(read), 06H (write in a single register ), 10H(write in
multiple holding register )
Data content
Register address Remark
Running mode
setting
1601
(PLC
˖
41602)
0x00: Shutdown mode
0x01: air supply mode
0x02: Cooling mode
0x03: Heating mode
0x04: Dehumidification mode
0x05: automatic mode
When setting other parameters, returning to abnormal data
function code. If write this register alone, the defaulted
setting is middle fan speed.
Set temperature
setting Ts
1602
(PLC
˖
41603)
Must be set within the normal temperature range. If the
temperature setting range is exceeded, the exception code
03 will be returned.
Temperature setting range is 17-30 °C
Ts cannot be set in the air supply and dehumidification
modes. Query Ts is 0
Fan speed setting
1603
(PLC
˖
41604)
0x02
˖
Low speed
0x03
˖
Middle speed
0x04
˖
High speed
0x05
˖
Auto speed
When setting other parameters, returning to abnormal data
function code.
Timer ON time
1604
(PLC
˖
41605)
Number 0~96 means: 0h timing to 24h timing
Timer OFF time
1605
(PLC
˖
41606)
Number 0~96 means: 0h timing to 24h timing
Indoor
temperature T1
1606
(PLC
˖
41607)
0~240 means -20~100°C
Calculation method: (tempe5) * 2 + 30
This register can only be read and cannot be written
Cold water coil
temperature T2-C
1607
(PLC
˖
41608)
Hot water coil
temperature T2-H
1608
(PLC
˖
41609)
Lock flag
1612
(PLC
˖
41613)
Bit0
Remote control lock 1: Yes. 0: No
Bit1
00: Lock off or no lock
01: Lock the cooling.
10: Lock the heating.
Bit2
In addition to the above three. The other bits of this byte are
all 0s.
Pump status
1613
(PLC
˖
41614)
Bit0 drain pump 1: On. 0: off
Except for the 2 bits above, other bits in this byte are 0. This
byte is read only.
ANNEXED III: MODBUS (RTU) MAPPING TABLE
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