Modbus Communication
12-11
AC10 Inverter
Eg 3
:
No.1 Inverter runs forwardly.
Host Query:
Address Function Register Hi Register Lo Write
status Hi
Write
status
Lo
CRC Lo
CRC
Hi
01
06
20
00
00
01
43
CA
Communication parameters address 2000H Forward running
Slave Normal Response:
Address Function Register Hi Register Lo Write
status Hi
Write
status
Lo
CRC Lo
CRC
Hi
01
06
20
00
00
01
43
CA
Normal Response
Slave Abnormal Response:
Address Function Abnormal Code
CRC Lo
CRC
Hi
01
86
01
83
A0
The max value of function code is 1. Illegal function code (assumption)
Eg4: Read the value of F113, F114 from NO.2 inverter
Host Query
:
Address Function Register
Address Hi
Register
Address Lo
Register
Count Hi
Register
Count
L0
CRC Lo
CRC
Hi
02
03
01
0D
00
02
54
07
Communication Parameter Address F10DH Numbers of Read Registers
Slave Normal Response
:
Address Function Byte
count
The first
parameters
status Hi
The first
parameters
status Lo
The second
parameters
status Hi
The second
parameters
status Lo
CRC
Lo
CRC
Hi
02
03
04
03
E8
00
78
49
61
The actual value is 10.00. The actual value is 12.00.
Slave Abnormal Response
:
Address Function
Code
Abnormal Code
CRC Lo
CRC
Hi
02
83
08
B0
F6
The max value of function code is 1. Parity check fault
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