Version 1.0 09/08/2017
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103
MODBUS Exception Code Table
MODBUS exception code
Code
Name
Explanations
01H Password error
The password written into by the password authentication address is
different from the password set by user (y0.01) .
02H Illegal data address
The request data address of host computer is disallowed; particular, the
combination of register address and number of bytes transferred are
invalid.
03H
Authentication
error
When the CRC check bit of RTU format or the LRC check bit of ASCII
format in the message sent from by host computer is different from the
value sent by auxiliary computer, the authentication error message will
be reported.
04H Illegal function
When the received function code from the host computer is a
disallowed operation; the slave in the wrong state may deal with such
requests too.
05H Illegal data value
When the received data field includes in the disallowed values. Note: it
does not mean the register data item to be stored includes an value
unexpected by application.
06H
Invalid parameter
changes
In the write command parameter sent by the host computer, it includes
data outside the scope of the parameter or the current state of write
address is not available.
07H System locked
When the host computer performs read or write command, if use has
set password and unlocked the password, it will report that the system
is locked.
08H
Auxiliary device
busy
The inverter is busy (EPPROM is saving)
