Mitsubishi Electronics fx3u Benutzerhandbuch

11 - 38

MELSEC-F

TROUBLESHOOTING

11

11 - 38

Does the external device 

operate normally?

YES

The Ethernet module hardware on
the sending side may be faulty.
Consult your nearest branch office or
dealer with the details of the errors.

NO

Check the device on the sending
side. (If the sending side is also an
Ethernet module, see Section 11.4.)

NO

1)

Data may not have been set from the
external device.
Check the sending side.
(If the sending side is also an
Ethernet module, see Section 11.4.)

Fix the faulty part of the device on 
sending side.

Did the error

occur in the device on the

sending side?

NO

YES

YES

YES

NO

YES

Does the communication

protocol (TCP/UDP) match with that

of the external device?

Is the parameter 

for IP address of the 

external device correct? 

Is each Port No. 

of the local and the 

external station 

correct?

NO

YES

Correct the IP address of the external
device.

The Ethernet module on receiving
side may be faulty. Consult your 
nearest branch office or dealer with 
the details of the errors.

Check the communication status
of the device on the sending side.

Is "0002

H

" written to

BFM#1610, 1611?

Change the condition for writing
"0002

H

" to BFM#1610, 1611.

Match the protocol with the
communication protocol (TCP/UDP) 
of the external device. 
(For details, see Section 5.5.)

Is the receive 

completion signal 

(corresponding bit of BFM#20485) 

of the applicable fixed buffer on?

Is the value of BFM#1610, 

1611 set to 

0001

H

?

NO