CWFL-3000/4000/6000 Series
Slave response
Error
For example: if the host’s sending address is 1, requests command of writing data
00 03 to register 2. Host send: 01 06 00 02 00 03 XX YY, thereinto, 01 as slave
address, 06 as function code, 00 02 as register address, 00 03 as written data and XX
YY as verification code.
Slave response: 01 06 00 02 00 03 XX YY, thereinto, 01 as slave address, 06 as
function code, 00 02 as register address, 00 03 as written data and XX YY as CRC
verification code.
If there is data error or communication exception, send 01 86 02 XX YY.
3. Read only parameter（sensor, current）
Read-only
Register
address
Description Range Default Unit
Data
resolution
Symbol
0x0100
Room temp. sensor
temperature
-25 ~ 100 ℃ 0.1/bit yes
0x0101
Water temp. sensor
temperature(Low temp)
-25 ~ 100 ℃ 0.1/bit yes
0x0102
Water temp. sensor
temperature(High temp)
-25 ~ 100 ℃ 0.1/bit yes
0x0103
Compressor exhaust
temperature
-25 ~ 140 ℃ 0.1/bit yes
0x0104 Flow of the first waterway 0.1-200 L/Min 0.1/bit yes
0x0105 Flow of the second waterway 0.1-200 L/Min 0.1/bit yes
0x0106 Conductivity 0.1-500 μs/cm 0.1/bit yes
0x0107
Compressor current
（Three-phase average）
0-50 A 0.1/bit yes
0x0108 Low temp. water pump current 0-50 A 0.1/bit yes
0x0109 High temp. water pump current 0-50 A 0.1/bit yes
Function code 1 bytes 0x86
Register address 2 bytes From 0x0400 to 0x044a
Register value 2 bytes From 0x000 to 0xffff
Error code 1 bytes 0x86
Exception code 1 bytes 01 or 02 or 03 or 04
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