8000m Series
- 144 -
Protocol data unit Data length(bytes) Range
Command 1 03H
Returned byte number 2 2*Read number
Data content 2
If the operation fails, the VFD will reply a message formed by failure command
and error code. The failure command is (Command＋0x80). The error code
indicates the reason of the error; see the table below.
Code Error Error content
01H Illegal Command
The command from master cannot be executed. The reason
maybe:
1. This command is only for new version and this version
cannot realize.
2. Slave is in fault and cannot execute it.
02H
Illegal data
address
Some of the operation addresses are invalid or not allowed to
access.
03H Illegal value
When there are invalid data in the message framed received
by slave.
Note: This error code does not indicate the data value to write
exceed the range, but indicate the message frame is an illegal
frame.
06H Slave busy VFD is Busy (EEPROM is storing).
10H Password error
The password written to the password check address is not the
same as the password set by F7.00.
11H Checksum error The CRC (RTU mode) check not passed.
12H
Written no
allowed
It only happen in write command, the reason maybe:
1. The data to write exceed the range of according parameter.
2. The parameter should not be modified now.
3. The terminal has already been used.
13H System locked
When password protection take effect and user does not
unlock it, write/read the function parameter will return this
error.
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