2. Wiring and Connection
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2-7-1 Contactor power ON sequences
The main circuit power supply is turned ON in the sequences in the following drawing when the
contactor control output (TE3: MC1) of the power supply unit is used. Each interface voltage of the main
circuit power supply (L1/L2/L3) is checked. If voltage is applied on any voltage (if the contactor is
melted), contactor melting (alarm 6A) is detected.
Contactor power ON sequences
POINT
The parameters must be set when controlling the contactor (MC1)
2-7-2 Contactor shutoff sequences
When an emergency stop or servo alarm occurs, the NC confirms the zero speed (motor stop or
dynamic brake operation) for all axes, and then shuts off the contactors.
If MC shut off enabled is not output, a contactor shutoff signal will be output in 30 seconds from the
power supply unit's CN23 connector to forcibly shut off the MC1 terminal. The spindle will coast after
that.
Contactor shutoff sequences
Control power supply (L11/L21)
Emergency stop from NC (EMG)
Main circuit power supply (L1/L2/L3)
Contactor control terminal (MC1)
ON
Cancel
Contactor fusion check
ON
OFF
1st axis
(dynamic brake stop)
2nd axis
(deceleration control)
3rd axis
(deceleration control + drop
prevention control)
0
0
Speed
Speed
Speed
MC1 (When normal)
OFF
Output
Drop prevention
Cancel
ON
Emergency stop (EMG)
MC1 (during NC emergency
stop error)
(CN23 operates)
OFF
Output
30s
0
fter 0rpm confirmation
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