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11 - 35
MELSEC-F
TROUBLESHOOTING
11
11 - 35
11.5.1 Sending errors during fixed buffer communication
(common to procedure exist and no procedure)
Sending error
Check the open status of the
connection with an external device.
connection with an external device.
Are the
corresponding connection
LEDs (C1-C2) lit?
If so, modify the program.
Read the open abnormal code (BFM
#229...) of the error log area and
check that no errors have occurred.
Read the open abnormal code (BFM
#229...) of the error log area and
check that no errors have occurred.
NO
YES
Have parameter
errors occurred?
NO
YES
Fix the error according to the error
code (see Section 11.4).
code (see Section 11.4).
Is the parameter,
IP address of the external device,
correct?
NO
YES
1)
Execute the open processing of the
applicable connection. (For details,
see Section 5.6.)
applicable connection. (For details,
see Section 5.6.)
Read the content of the communication
abnormal code storage area (BFM
#125, 135) corresponding to the
fixed buffer of the buffer memory and
check whether or not a communication
error has occurred.
abnormal code storage area (BFM
#125, 135) corresponding to the
fixed buffer of the buffer memory and
check whether or not a communication
error has occurred.
Has a communication
error occurred?
NO
YES
Fix the error according to the error
code (see Section 11.4).
code (see Section 11.4).
Correct the IP address of the external
device.
device.
1)
NO
YES
Check that "send" is set in the
parameter open settings.
parameter open settings.
Are the open settings
set to "send"?
Change parameters to "send".