High Performance Universal Converter User Manual Chapter VII Modbus Communication Protocol
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0x09
User password
protection
When the user password is set, the host does not unlock the password
operation to directly read and write the function code
Communication error command code table:
Error
command
name
description
0x 83
0x03 Read error
During the 0x03 error while reading the command, the command code in the
responding data frame changes from 0x03 + 0x80 to 0x83
0x 86
0x06 Write error
When 0x06 When an error writes a command, the command code in the
responding data frame changes from 0x06 + 0x80 to 0x86
0x 90
0x 10 Read error
When the responding data frame is 0x 10 + + reads the command with an error,
the command code in the responding data frame changes from 0x 10 + 0x80 to
0x 90
give an example:
Host send: 01 06 00 03 00 05 B9 C9 (function code write operation 00-03=5)
Frequency converter response: 01 86 04 43 A3
The maximum value of function code 00-03 is 2. When 5 is written with 0x06 command code, the inverter will have
communication error command code 0x86 and error code 0x04, and writing 00-03=5 fails
