Mitsubishi MELSEC-Q Series User Manual page 255

13 TROUBLESHOOTING
Error code
Error details
(hexadecimal)
B823 Remote control mode error
B903 Transient request error
Communication buffer size
B904
setting error
B983 Model illegal
B984 Model illegal
BA19 Corresponding station error
BA1B All stations error
BBC2 Station number setting error
BBC5 Master station overlapping error
BD85 Hardware error detection
Transient request overload
BFFB
error
BFFE CPU monitoring timer time out
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Table 13.1 Error code list (5/5)
Cause of error occurrence (details)
The mode setting of the remote control
was incorrect.
A transient request was issued to a
station that has not secured a
communication buffer area.
The communication buffer size of the
corresponding station was out of range
when a dedicated instruction was
executed.
The remote net ver. 2 mode/remote net
additional mode has been set to the
master station of the QJ61BT11.
The remote net ver. 2 mode/remote net
additional mode has been set to the
master station of the QJ61BT11.
The corresponding station that is being
tested stopped communication during
line test 1.
All stations stopped communications
during line test 1.
The station number setting switch setting
of the module is other than "0 to 64".
Alternatively, the last station number is
greater than 64.
Multiple master stations exist on the
same line.
Alternatively, line noise was detected at
power on.
A hardware error was detected.
There are too many transient requests to
the corresponding station.
The CPU monitoring timer timed out.
Corrective action
Check the mode specification.
Secure a communication buffer
area with a parameter.
Set the communication buffer
size of the corresponding
station within the range.
Set to the remote net ver. 1
mode/remote I/O net mode.
Set to the remote net ver. 1
mode/remote I/O net mode.
Check the cable and the
corresponding station.
Check the cables.
Check the station number and
the number of occupied stations
of the module.
Reduce the number of master
stations on the same line to
one.
Alternatively, check the line
status.
There is most likely a hardware
error in either the QJ61BT11,
the CPU module, the base unit
or other modules. Contact your
nearest Mitsubishi
representative.
Wait for a while before
transmitting again (transient
overload status).
Check the operation of the
target station.
MELSEC-Q
Detectability
Master station Local station
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