242
bit
bit
bit
(1-8-1 format, odd parity)
Start
bit
1
2
3
4
5
6
7
Odd
parity
Stop
bit
(1-8-1 format, even parity)
Start
bit
1
2
3
4
5
6
7
Even
parity
Stop
bit
Communications data structures
RTU mode
：
START
Maintaining no input signal for more than
or equal to 10ms
Address
address
：
8-bit Binary address
Function
Function code
：
8-bit Binary address
DATA
（
n - 1
）
Data content
：
N*8-bit data
，
N<=8
，
less than 8 bytes
……………
DATA 0
CRC CHK Low
CRC Check code
CRC CHK High
16-bit CRC check code is combined with 2
8-bit Binary code
END
Maintaining no input signal for more than
or equal to 10ms
The most important function of Modbus is to read and write parameters. Different function
codes determine different operation requests. Inverter Modbus protocol supports the
following function code operation:
Summary of Contents for DGI900
Page 1: ...User Manual DGI900 ...
Page 181: ...181 ...
