Mitsubishi MELSEC-F User Manual page 265

11 TROUBLESHOOTING
1)
Is the parameter
for IP address of the
external device correct?
Is each Port No.
of the local and the
external station
correct?
YES
Does the communication
protocol (TCP/UDP) match with that
of the external device?
YES
Is the receive
completion signal
(corresponding bit of BFM#20485)
of the applicable fixed buffer on?
Is the value of BFM#1610
to 1617 set to
0001 ?
H
YES
Is "0002 " written to
H
BFM#1610 to 1617?
YES
Check the communication status
of the device on the sending side.
Does the external device
operate normally?
YES
The Ethernet module hardware on
the sending side may be faulty.
Consult your nearest dealer with the
details of the errors.
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NO
NO
Data may not have been set from the
external device.
NO
Check the sending side.
(If the sending side is also an
Ethernet module, see Section 11.4.)
occur in the device on the
The Ethernet module on receiving
side may be faulty. Consult your
nearest dealer with the details of
errors.
NO
Change the condition for writing
"0002 H" to BFM#1610 to 1617.
NO
Check the device on the sending
side. (If the sending side is also an
Ethernet module, see Section 11.4.)
Correct the IP address of the external
device.
Match the protocol with the
communication protocol (TCP/UDP)
of the external device.
(For details, see Section 5.5.)
Did the error
NO
sending side?
YES
MELSEC-F
Fix the faulty part of the device on
sending side.
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