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CV3100 series and MINI series high performance general purpose inverter instruction manual
9-4
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
:
2byte
| | | |___________________length
:
2byte
| | |____________________________________length
:
2byte
|
|_____________________________________________length:1byte
:
|________________________________________________________length
:
1byte
Slave address
1~31
(
decimal
)
1byte
Function code
03H
1byte
Register address
Address high 8-bit
2byte
Address low 8-bit
Register number
(
N
)
high 8-bit
2byte
low 8-bit
CRC check code
low 8-bit
2byte
Note
:
check code low 8-bite
ahead
high 8-bit