Mitsubishi FX2N-16CCL-M, Руководство пользователя

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FX2N-16CCL-M CC-Link System Master Block Troubleshooting 13
13-2
13.1 Verification when Trouble Occurs
The table below shows the details to be checked and corrective actions for each trouble
occurrence.
Table 13.1:
Trouble description Details to be checked Confirmation method
Data link is disabled
in the entire system.
Are any cables broken?
Check the cable status visually or by the line
test.
Are terminal resistors properly connected to
stations at the both ends?
Connect terminal resistors offered as
accessories of the master module to stations
at the both ends.
Has an error occurred in the master station?
Check the error code in the PLC, and take
the corrective action.
Are parameters set in the master station?
Confirm the contents of the parameters.
Confirm the contents of the parameters in
link special registers.
(Refer to Subsection 9.3.2)
Is the write request for data link startup
(BFM#A
H
b6 or b8) ON?
Confirm the sequence program.
Has an error occurred in the master station?
Confirm the following:
•
Parameter status in the host station
(SW0068)
• Switch setting status (SW006A)
• Loading status (SW0069)
• Flashing of the ERR LED in the master
station (Section 13.2.)
Inputs from a remote
I/O station cannot be
received.
Is the remote I/O station executing data link?
Check the following:
•
LED indication in the module
• Communication status in the master
station with other stations (SW0080)
Is data read from the correct address of
remote input RX (buffer memory)?
Confirm the sequence program.
Is the station specified as reserved one? Confirm the contents of the parameters.
Does the station number overlap? Confirm the station number
Is the connection/setting beyond the
specification of the master station? Confirm the contents of the BFM#1D
H
.
(Section 4.6.5)
Outputs are disabled
in a remote I/O
station.
Is the remote I/O station executing data link?
Check the following:
•
LED indication in the module
• Communication status in the master
station with other stations (SW0080 to
SW0083)
Is the refresh command output (BFM#A
H
b0)
ON in the master station?
Confirm the sequence program.
Is data written to the correct address of
remote output RY (buffer memory)?
Confirm the sequence program.
Is the station specified as reserved one? Confirm the contents of the parameters.
Does the station number overlap? Confirm the station number
Is the connection/setting beyond the
specification of the master station? Confirm the contents of the BFM#1D
H
.
(Section 4.6.5)
Things to do after checking the communication status with other stations (SW0080)
1) Read the contents of the BFM#1DH, and check whether access outside the allowable range is not
executed. (Refer to Section 4.6.5.)
2) Check whether the cable wiring is correct.
3) Check whether terminal resistors are correctly connected to modules at the both ends.
4) Check whether communication is enabled when the transmission speed is made slower.
5) Check whether the settings are consistent between the parameters and the startup station.
6) Check whether the station numbers overlap.
7) Replace a faulty module with a correctly operating one, and check whether the single module is
defective.