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MELSEC-QnA
13 TROUBLESHOOTING
13.3 Error Codes
Table 13.1 lists the error codes that are stored in the link special registers (SW).
When a standby master station is used, refer to the respective columns under
"Delectability" in the table as explained below.
x When a standby master station is operating as a master station: "Master station"
column
x When a standby master station is operating as a standby master station: "Local
station" column
Table 13.1 Error code list (1/6)
Detectability Error code
(hexadecimal)
Error details Cause of error occurrence (details) Corrective action
Master station Local station
4000 to
4FFF
An error detected in a programmable controller CPU
Take a corrective action, referring to the troubleshooting description in the user’s manual for the CPU module used.
7000 to
7FFF
An error detected in a serial communication module
Take a corrective action, referring to the troubleshooting description in the Serial Communication Module User's Manual or other relevant
manuals.
B104 Data link restart error
Data link restart (SB0000) was executed
for the station that was performing a data
link.
Execute Data link restart (SB0000)
for the station that has stopped a
data link with Data link stop
(SB0002).
B105 Data link stop error
Data link stop (SB0002) was executed
for the station that had stopped a data
link.
Execute Data link stop (SB0002) for
the station that is performing a data
link.
B110 1
Transient data can not be
received
A line error has occurred. Check the line.
B111 1
Transient data receiving order
error
A line error has occurred. Check the line.
B112 1 Transient data length error A line error has occurred. Check the line.
B113 1 Transient data ID error
A line error has occurred or an
instantaneous power failure has occurred
at the send station.
Check the line, or check the supply
power and power supply module of
the send station.
B115 1 Link error A line error has occurred. Check the line.
B116 1 Packet error A line error has occurred. Check the line.
B201 1
Corresponding station error
during sending
A data link error occurred at the
corresponding station during transient
transmission.
Check the data link status of other
stations, if a temporary error invalid
station is set, or if the corresponding
station is stopped.
B205 Transient target station error
A transient request was issued to other
than the intelligent device station.
Check the target station.
B301
Processing request error during
link stop
Line test request was issued while the
link was stopped.
Perform a line test while the link is
being established.
B302
Specified station number
setting error
The specified station number exceeded
the highest communication station
number during temporary error invalid
request/temporary error invalid cancel
request.
Specify a station number that is no
greater than the highest
communication station number.
B303
Specified station number not
set error
The station number was not specified during
temporary error invalid request/temporary
error invalid cancel request.
Set a specified station number.
(SW0003, SW0004 to SW0007)
B304 Line test error station detected
An error was detected in a remote
station, intelligent device station or
standby master station when a line test
was performed.
Check that the remote station,
intelligent device station or standby
master station is operational and
that the cable is not disconnected.
B306
Specified station number
setting error
A station number other than the head
station number was specified during
temporary error invalid request/temporary
error invalid cancel request.
Specify a head station when
temporary error invalid
request/temporary error invalid
cancel request is requested.
B307 All stations data link error
All stations were in data link error status
when one of the following requests was
made:
• SB0000 (data link restart)
• SB0002 (data link stop)
Request again after the data link
becomes normal.
B308
Station number setting error
(installation status)
The station number of the slave station is
outside of the range between "1 and 64".
Set the station number of the slave
station within the range between "1
and 64".
B309 Station number overlap error
The station number of the connected
module was duplicated (including
number of occupied stations).
However, this excludes the duplicate
head station number.
Check the module station number.
1: Error code added to the function version B or later.