Modbus Error Codes
MCD Modbus Module Instructions
MG.17.F5.02 - VLT
® is a registered Danfoss trademark
8
Upload parameter to starter
MCD 500: Write Parameter 4, Current Limit (Parameter 1-4), set = 400% FLC
Message
Starter
Address
Function
Code
Register
Address
Data
CRC
In 20 06
40012
400
CRC1,
CRC2
Out 20 06 40012
400
CRC1,
CRC2
9.
Modbus Error Codes
Code
Description
Example
01
Illegal function code
Function other than 03 or 06
02
Illegal data address
Register number invalid
03
Not readable data
Register not allowed for data reading
04
Not writable data
Register not allowed for data writing
05
Data boundary fault
Multiple data transfer across data boundary or data size more than
125
06
Invalid command code
e.g. writing "6" into 40003
07
Illegal parameter read
Invalid parameter number
08
Illegal parameter write
Invalid parameter number, read only, or hidden parameter
09 Unsupported
command Sending a serial command to MCD 500 with parameter 3-2 =
Disable control in RMT.
10
Local communication error Communication error between Modbus slave and starter
N.B.!:
Some of the above codes are different from those defined in the Modbus Application
Protocol Specification available on www.modbus.org.