INVT Goodrive300-01A Series Operation Manual page 169

Goodrive300-01A series VFD for air compressor
D.2.5 Error message response
Code Name
01H Illegal command
Illegal data
02H
address.
03H Illegal data value
04H Operation failed
05H Password error
06H Data frame error
Written not
07H
allowed.
Parameter cannot
08H be modified
during running
Password
09H
protection
The slave uses function code fields and fault addresses to indicate it is a normal response or some
error occurs (named as objection response). For normal responses, the slave shows corresponding
function codes, digital address or sub-function codes as the response. For objection responses, the
slave returns a code which equals the normal code, but the first byte is logic 1.
For example: when the master sends a message to the slave, requiring it to read a group of address
data of the VFD function codes, there will be following function codes:
Table D-2 Error message response and meaning
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 state and cannot execute it.
Some of the operation addresses are invalid or not allowed to
access. Especially the combination of the register and the
transmitting bytes are invalid.
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.
The parameter setting in parameter writing is invalid. For
example, the function input terminal cannot be set repeatedly.
The password written to the password check address is not
same as the password set by P7.00.
In the frame message sent by the upper computer, the length of
the digital frame is incorrect or the counting of CRC check bit in
RTU is different from the lower computer.
It only happen in write command, the reason maybe:
1. The written data exceeds the parameter range.
2. The parameter should not be modified now.
3. The terminal has already been used.
The modified parameter in the writing of the upper computer
cannot be modified during running.
When the upper computer is writing or reading and the user
password is set without password unlocking, it will report that the
system is locked.
Meaning
-164-
Communication protocol