EasyDrive CV3100 Series Instruction Manual page 138

CV3100 series and MINI series high performance general purpose inverter instruction manual

Function code explain in detail and communication frame sample:

03H：Readout the content of register
Readout binary data from slave machine holding register,no support
broadcast, At present a frame information can read a maximum of 5 address
continuous data.
Query message frame format：
Slave address + 03H + register address + the register number of data hold(N) +
CRC CHK
| |
| |
| |
|_____________________________________________length:1byte ：
|
|________________________________________________________length：1byte
Slave address
Function code
Register address
Register number （ N）
CRC check code
|
|
|____________________________________length：2byte
1~31（decimal）
03H
Address high 8-bit
Address low 8-bit
high 8-bit
low 8-bit
low 8-bit
high 8-bit
9-4
|
|___________________length：2byte
1byte
1byte
2byte
2byte
2byte
Note：check code low 8-bite
ahead
|__length： 2byte