S&A CWFL-4000 User Manual page 14

Slave response
Function code
Register address
Register value
Error
Error code
Exception code
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）
Register
Description
address
Room temp. sensor
0x0100
temperature
Water temp. sensor
0x0101
temperature(Low temp)
Water temp. sensor
0x0102
temperature(High temp)
Compressor exhaust
0x0103
temperature
0x0104 Flow of the first waterway
0x0105 Flow of the second waterway
0x0105 Conductivity
Compressor current
0x0106
（Three-phase average）
0x0107 Low temp. water pump current
0x0108 High temp. water pump current
1 bytes 0x86
2 bytes From 0x0400 to 0x044a
2 bytes From 0x000 to 0xffff
1 bytes 0x86
1 bytes 01 or 02 or 03 or 04
Read-only
Range
-25 ~ 100
-25 ~ 100
-25 ~ 100
-25 ~ 140
0.1-200
0.1-200
0.1-500
0-50
0-50
0-50
Default Unit
℃
℃
℃
℃
L/Min
L/Min
μs/cm
A
A
A
14
CWFL-4000 Series
Data
Symbol
resolution
0.1/bit yes
0.1/bit yes
0.1/bit yes
0.1/bit yes
0.1/bit yes
0.1/bit yes
0.1/bit yes
0.1/bit yes
0.1/bit yes
0.1/bit yes