HV100 Series High Performance Current Vector Inverter
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Appendix 1: Modbus communication protocol
1. RTU mode and format
When the controller communicates on Modbus bus in RTU mode, every 8-bit byte in the information is divided into 2
4-bit hexadecimal characters, which
The main advantage of mode is that the density of characters transmitted by mode is higher than that of ASCII mode at
the same baud rate, and every message must be continuously transmitted.
(1) the format of each byte in 1)RTU mode
Coding system: 8-bit binary, hexadecimal 0-9, A-F.
Data bit: 1-bit start bit, 8-bit data (lower bit first sent), 1-bit stop bit, and optional parity bit. (Refer to RTU data
frame as sequence diagram)
Error check area: cyclic redundancy check (CRC).
(2)RTU data frame bit sequence diagram
With parity check
Start
1
2
3
4
5
6
7
8
Far
Stop
No parity check
Start
1
2
3
4
5
6
7
8
Stop
2. Registers address and function code of series inverter
(1) Supported function codes
Function code
Functional Description
03
Read multiple registers
06
Write a single register
10
Write multiple registers continuously
13
Read a single parameter
(2) Register address
(
2
)
Register Map
Address
Control command input
0DI2000
Monitoring parameter reading
0xD000
(
0DI1D00
)~
0xD039
(
0DI1D39
)
MODBUS frequency setting
0DI201
MODBUS torque setting
0DI2002
MODBUS PID frequency given
0DI2003
MODBUS PID feedback setting
0DI2004
MODBUS analog output AO1 control
0di2005 (0 ~ 7fff means 0% ~ 100%)
MODBUS analog output AO1 control
0DI2006
(
0
~
7FFF means 0%
~
100%
)
MODBUS pulse DO output control
0DI2007
(
0
~
7FFF means 0%
~
100%
)
MODBUS digital output terminal control
0DI2008
Parameter setting
0x0000
~
0xF016
(3) Read multiple parameters in 3)03H (read 8 items continuously at most)
Inquiry information frame format:
Address
01H
Function
03H
Starting data address
00H
01H
Number of Data(Byte)
00H
02H
CRC CHK High
95H
CRC CHK Low
CBH