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MELSEC-QnA
13 TROUBLESHOOTING
Table 13.1 Error code list (6/6)
Detectability Error code
(hexadecimal)
Error details Cause of error occurrence (details) Corrective action
Master station Local station
BBC1 Mode setting error (switch)
The mode setting switch is set outside
the range.
Set it within the range.
BBC2
Station number setting error
(switch)
The station number setting switch setting
of the module is other than "0 to 64".
Alternatively, the last station number is
greater than 64.
Check the station number and
the number of occupied stations
of the module.
BBC3
Transmission speed setting
error (switch)
Module's transmission speed setting
switch is set out of the range of "0 to 4".
Set it in the range of "0 to 4."
BBC4
Station type change error
(station number)
An attempt was made to change the
master station (0) to the local station (1 to
64), or the local station (1 to 64) to the
master station (0) by executing a module
reset (Yn4).
Change by resetting the
programmable controller CPU.
BBC5 Master station overlapping error
Multiple master stations exist on the
same line.
Alternatively, line noise was detected at
power on.
Reduce the number of master
stations on the same line to
one.
Alternatively, check the line
status.
BBC6 Mode change error
An attempt was made to change the
mode from 0 or 2 to the test mode by
executing a module reset (Yn4).
Change by resetting the
programmable controller CPU.
BBC7 Module error Module is defective. Replace the module.
BD85 Hardware error detection
A hardware error was detected.
The possible cause is the
hardware failure of the
AJ61QBT11/A1SJ61QBT11,
CPU module, base unit, or
other modules. Please consult
your local Mitsubishi
representative.
BFFE CPU monitoring timer time out
The CPU monitoring timer timed out.
Check the operation of the
target station.
C000 to
CFFF
An error detected in an Ethernet interface module
Take a corrective action, referring to the troubleshooting description in the Ethernet Interface Module User's Manual.
D000 to
DFFF
An error detected in CC-Link IE Field Network
Take a corrective action, referring to the troubleshooting description in the CC-Link IE Field Network User's Manual.
E000 to
EFFF
An error detected in CC-Link IE Controller Network
Take a corrective action, referring to the troubleshooting description in the CC-Link IE Controller Network Reference Manual.
F000 to
FFFF
An error detected in a MELSECNET/H and MELSECNET/10 network system
Take a corrective action, referring to the troubleshooting description in the MELSECNET/H or MELSECNET/10 Network System Reference
Manual.