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2. Wiring and Connection
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2-5-3 Main circuit control
(1) Contactor ON sequence
Main circuit power is turned ON in the sequence shown below when an emergency stop status is
canceled.
(2) Contactor shutoff sequence
When an emergency stop occurs, the NC checks the MC shutoff permission (motor stop or dynamic
brake operation) status for all axes and then shuts off the contactors. If there is no MC shutoff
permission output, the contactors are forced off 30 seconds later by their control units. Contactors
are shut off immediately if an alarm occurs.
OFF
ON
Emergency stop (EMG)
ON
OFF
Ready ON signal (READY)
ON
OFF
Servo ON signal (SERVO)
0
500 1000 1500
Time
(
ms
)
Command input enable
OFF
ON
Motor brake control output (CN20)
Dynamic brake
OFF
ON
Contactor control output (MC1)
ON
OFF
PN bus voltage
PN charging completed
Motor ON (GATE)
ON
OFF
Ready completion
Contactor ON sequence
Servo 1st axis
(Dynamic brake stop)
Servo 2nd axis
(Deceleration control)
Servo 3rd axis
(Drop prevention control)
0
0
0
MC shutoff
permission
Speed
MC shutoff
permission
Speed
MC shutoff
p
ermission
Speed
Contactor control output (MC1)
ON
OFF
Contactor shutoff sequence
Drop prevention
Shutoff after all-axes
permission check
OFF
ON
Emergency stop (EMG)
Spindle
(Deceleration stop)
0
MC shutoff
permission
Speed