23
MG.10.P2.22 - VLT is a registered Danfoss trademark
Exception
Codes
When the VLT 6000 responds to the master
via the Modbus serial network, it uses the
function code field to indicate either a normal
(error-free) response or an error (called an
exception response). In an error-free
response, the drive simply echoes the original
function code. For an exception response,
the drive will return a code that is equivalent
to the original function code with its most-
significant bit set to a logic 1. In addition, the
drive places a unique code into the data field
of the response message. This tells the
master what kind of error occurred, or the
reason for the exception. The tables below
identify the codes and describe their
meaning.
Modbus
Code
(decimal)
Meaning
00
The parameter number does not exist
01
There is no write access to the parameter
02
The data value exceeds the parameter limits
03
The used sub-index does not exist
04
The parameter is not of the array type
05
The data type does not match the parameter called
17
Data change in the parameter called is not possible in the present
mode of the drive. Some parameters can only be changed when the
motor has stopped
130
There is no bus access to the parameter called
131
Data Change is not possible because factory setup is selected
255
Message Timeout
VLT 6000 Errors
Modbus RTU Errors
Modbus
Code
(decimal)
Meaning
64
Invalid Data Address
65
Invalid Message Length
66
Invalid Data Length
67
Invalid Function Code
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