Mitsubishi Electric FX3U-ENET User Manual page 245

11 TROUBLESHOOTING
Error code
(abnormal Description of error
code)
C020 Data length exceeds the allowable range.
H
An abnormal end response was received after a
C021
H
transmission using fixed buffers.
• A response could not be received within the
response monitoring timer value.
C022
H
• The applicable connection was closed while
waiting for a response.
• The open processing for the applicable
C023 connection is not completed.
H
• The applicable connection is closed.
C030 A sending error occurred.
H
A TCP ULP timeout error occurred in the TCP/
C032 IP communication.
H
(An external device does not return ACK.)
An external device side with the set IP address
C033
H
does not exist.
The existence of an external device could not
C035 be confirmed within the response monitoring
H
timer value.
• Not all the data could be received within the
response monitoring timer value.
• Sufficient data for the data length could not
C040 be received.
H
• The remaining part of a message divided at
the TCP/IP level could not be received within
the response monitoring timer value.
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Error handling
• Correct the data length.
• If the data transmitted is larger than the
allowable size, divide and then send it.
• Read the end code of the response from the
connection end code/error log area, and
handle as needed.
• Check the operation of the external device.
• Review and correct the response monitoring
timer value.
• Check the open status of the applicable
connection.
• Execute the open processing of the
applicable connection.
• 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.
• 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.
• 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.
• 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.
• 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.
MELSEC-F
Storage destination
BFM# BFM# BFM# BFM# BFM#
105 124 125 126 229
BFM#
22649
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