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MELSEC-F
TROUBLESHOOTING11
11 - 31
* 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.
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
C1A7
H Incorrect network number was designated.
• Correct the designated value of the network
number.
C1AC
H Incorrect resent count was designated.
• Correct the designated value of the resent
count.
C1AD
H Incorrect data length was designated.
• Correct the designated value of the data
length.
C1AE
H
Incorrect mail sending/receiving data length and
header length were designated.
• Correct the designated values of sending/
receiving data length and header length.
• Sending/receiving data length should be
equal or longer than the header length.
C1AF
H Incorrect port number was designated.
• Correct the designated value of the port
number.
C1B0
H
The open processing of the designated
connection is already completed.
• Execute the open processing after executing
the close processing.
C1B1
H
The open processing of the designated
connection has not been completed.
• Execute the open processing.
C1B2
H
The OPEN/CLOSE instruction is being
executed in the designated connection.
• Execute after the OPEN/CLOSE instruction
is completed.
C1B3
H
Another sending/receiving instruction is being
executed on the designated channel.
• Change the channel number.
• Execute after the sending/receiving
instruction is completed.
C1B6
H
Incorrect mail destination number was
designated.
• Review the designated value of the mail
designation number.
• Review the sending mail address setting
parameter.
C203
H
System error
• The OS detected any error.
(*1)
C206
H
System error
• The OS detected any error.
(*1)
C280
H
The set limit number for MELSOFT connections
is exceeded
• Modify your open settings so that there are a
total of 4 or less MELSOFT connections/MC
protocol connections..
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.