Chapter 6 Troubleshooting; Station Status If An Error Occurs - Mitsubishi Electric MELSEC Q Series User Manual

CHAPTER 6
This chapter describes troubleshooting of CC-Link/LT.
6.1

Station Status if an Error Occurs

The following table lists station status if an error occurs.
The CPU module on the master
station is faulty and stopped (data
link stopped).
A remote station is faulty due to
an error such as data link error
(data link continued).
Power of a remote station is shut
off (data link continued).
*1
*2
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TROUBLESHOOTING
Data link status
Input data from the
faulty remote
station are cleared.
Input data from the
de-energized
remote station are
cleared.
Although external data are input (The input LED turns on.), the data are not sent to the master station.
The status depends on the output hold setting of the remote station.
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Master station
Remote input Remote output
Maintained Maintained
Continued
Continued
Remote station
Input Output
*1
Continued Maintained/OFF
*1
Continued Maintained/OFF
Depends on
All OFF
external signals.
*2
*2