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MELSEC-A
6 TROUBLESHOOTING
(5) When the AJ65SBT-64AD "L ERR." LED flickers at fixed intervals
Check item Corrective action
Has the station number or transmission speed
setting switch position been changed during normal
operation?
After correcting the setting switch setting, switch
power on again.
Is the station number or transmission speed setting
switch faulty?
If the "L ERR." LED has begun flickering though
switch setting change was not made during
operation, the possible cause is a hardware fault.
Contact your nearest Mitsubishi representative.
(6) When the AJ65SBT-64AD "L ERR." LED flickers at unfixed intervals
Check item Corrective action
Have you forgotten fitting the terminal resistor?
Check whether the terminal resistor is fitted. If it is
not connected, connect it and switch power on
again.
Is the module or CC-Link dedicated cable affected
by noise?
Earth both ends of the shield wire of the CC-Link
dedicated cable to the protective earth conductor
via SLD and FG of the corresponding module.
Earth the FG terminal of the module without fail.
When carrying out wiring in piping, earth the pipe
without fail.
(7) When the AJ65SBT-64AD "L ERR." LED is on
Check item Corrective action
Are the station number and transmission speed
correct?
Set the correct station number and transmission
speed.