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MELSEC-F
TROUBLESHOOTING11
11 - 23
Error code
(abnormal
code)
Description of error Error handling
Storage destination
Initial
Open
Fixed
sending
Connection
Error code
E-mail log
BFM#
105
BFM#
124
BFM#
125
BFM#
126
BFM#
229
BFM#
22649
C020
H Data length exceeds the allowable range.
• Correct the data length.
• If the data transmitted is larger than the
allowable size, divide and then send it.
C021
H
An abnormal end response was received after a
transmission using fixed buffers.
• Read the end code of the response from the
connection end code/error log area, and
handle as needed.
C022
H
• A response could not be received within the
response monitoring timer value.
• The applicable connection was closed while
waiting for a response.
• Check the operation of the external device.
• Review and correct the response monitoring
timer value.
• Check the open status of the applicable
connection.
C023
H
• The open processing for the applicable
connection is not completed.
• The applicable connection is closed.
• Execute the open processing of the
applicable connection.
C030
H A sending error occurred.
• Check the operation of the external device.
• Send after an arbitrarily selected time has
elapsed because packets may be congested
on the line.
• Check that the connection cable is not
dislocated.
C032
H
A TCP ULP timeout error occurred in the TCP/
IP communication.
(An external device does not return ACK.)
• Check the operation of the external device.
• Correct the TCP ULP timeout value and
execute the initial processing again.
• Send after an arbitrarily selected time has
elapsed because packets may be congested
on the line.
• Check that the connection cable is not
dislocated.
C033
H
An external device side with the set IP address
does not exist.
• Review and correct the external device's IP
address and the Ethernet address.
• If the external device has the ARP function,
set the initial value. If not, set the Ethernet
address of the external device.
• Check the operation of the external device.
• Send after an arbitrarily selected time has
elapsed because packets may be congested
on the line.
• Check that the connection cable is not
dislocated.
• Just after powering ON, there are cases
when the connected hub is not booted, so
send will occur after an arbitrary time period
has elapsed.
C035
H
The existence of an external device could not
be confirmed within the response monitoring
timer value.
• Check the operation of the external device.
• Review and correct each setting value for the
existence confirmation.
• Check that the connection cable is not
dislocated.
C040
H
• Not all the data could be received within the
response monitoring timer value.
• Sufficient data for the data length could not
be received.
• The remaining part of a message divided at
the TCP/IP level could not be received within
the response monitoring timer value.
• Review and correct the data length of the
communication data.
• Review and correct each setting value at the
initial processing because the packets may
be congested on the line.
• Send the same data from the external device
again.