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MELSEC-F
TROUBLESHOOTING11
11 - 29
* 1 Take corrective action using the following procedure.
1) Check whether the expansion connectors are connected correctly.
2) Check whether the operating environment of the Ethernet module is within the general
specifications range of the module.
3) Check whether the power supply capacity is sufficient or not.
4) Check whether the hardware of the Ethernet module, power supply block and PLC are normal
according to the manuals of the corresponding modules.
If any module is faulty, please request your local Mitsubishi service center or representative to
have it serviced.
5) If the problem cannot be solved through the above steps, please consult your local Mitsubishi
service center or representative, explaining the operation/communication conditions at the time of
error occurrence and the information stored in the error log area within the buffer memory of the
Ethernet module.
NOTE
Depending on the restrictions of the buffers of the local station and external device,
data may be divided for communication.
Data received separately is restored (reassembled) by the Ethernet module to be
communicated using the fixed buffer, etc. The received data is restored
(reassembled) based on the data length in the communication data.
The Ethernet module performs the following processing if data among the
communication data is incorrect.
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#
23661
C281
H
Improper usage setting of connections for fixed
buffer
• Review and correct the set value for usage of
connections No. 1 and 2.
C282
H
Improper usage setting of connections for
MELSOFT connection/MC protocol
• Review and correct the set value for usage of
connections No. 3 and 4.
C300
H
A response could not be received within the
response monitoring timer value.
• Check the operation of the external device.
• Review and correct the response monitoring
timer value.