Goodrive350-19 series VFD Communication protocols
- 438 -
codes and definitions of the error message responses.
Code
Name
Definition
01H
Invalid
command
The command code received by the upper computer is not allowed
to be executed. The possible causes are as follows:
• The function code is applicable only on new devices and is not
implemented on this device.
• The slave is in the faulty state when processing this request.
02H
Invalid data
address
For the VFD, the data address in the request of the upper computer
is not allowed. In particular, the combination of the register address
and the number of the to-be-transmitted bytes is invalid.
03H
Invalid data bit
The received data domain contains a value that is not allowed. The
value indicates the error of the remaining structure in the combined
request.
Note:
It does not mean that the data item submitted for storage in
the register includes a value unexpected by the program.
04H
Operation
failure
The parameter is set to an invalid value in the write operation. For
example, a function input terminal cannot be set repeatedly.
05H
Password
error
The password entered in the password verification address is
different from that set in P03.00.
06H
Data frame
error
The length of the data frame transmitted by the upper computer is
incorrect, or in the RTU format, the value of the CRC check bit is
inconsistent with the CRC value calculated by the lower computer
07H
Parameter
read-only
The parameter to be modified in the write operation of the upper
computer is a read-only parameter.
08H
Parameter
cannot be
modified in
running
The parameter to be modified in the write operation of the upper
computer cannot be modified during the running of the VFD.
09H
Password
protection
A user password is set, and the upper computer does not provide
the password to unlock the system when performing a read or write
operation. The error of "system locked" is reported.
When returning a response, the device uses a function code domain and fault address to indicate
