Unitronics UMI-B1 UL Series Operation Manual page 127

UMI-B1 UL Series Inverter
7.3.7 Fault message response
There may be fault in the communication control. For example, some parameter can
only be read. If a writing message is sent, the inverter will return a fault response
message.
The fault message is from the inverter to the master, its code and meaning is as below:
Code Name
Illegal
01H
command
Illegal data
02H
address.
03H Illegal value
Operation
04H
failed
Password
05H
error
Data frame
06H
error
Written not
07H
allowed.
The
parameter
08H cannot be
modified
during running
Password
09H
protection
The slave uses functional code fields and fault addresses to indicate it is a normal
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 monitor, the
length of the digital frame is incorrect or the counting of
CRC check bit in RTU is different from the lower monitor.
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
monitor cannot be modified during running.
When the upper monitor is writing or reading and the
user password is set without password unlocking, it will
report that the system is locked.
125
Communication protocol
Meaning