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3. SIGNALS AND WIRING
3.5.3 Power-on sequence
(1) Power-on procedure
1) Always wire the power supply as shown in above Section 3.5.1 using the magnetic contactor with
the main circuit power supply (3-phase 200V: L
1
, L
2
, L
3
, 1-phase 230V: L
1
, L
2
). Configure up an
external sequence to switch off the magnetic contactor as soon as an alarm occurs.
2) Switch on the control circuit power supply L
11
, L
21
simultaneously with the main circuit power
supply or before switching on the main circuit power supply. If the main circuit power supply is not
on, the display shows the corresponding warning. However, by switching on the main circuit power
supply, the warning disappears and the servo amplifier will operate properly.
3) The servo amplifier can accept the servo-on command within 3s the main circuit power supply is
switched on. (Refer to paragraph (2) in this section.)
(2) Timing chart
(3s)
ON
OFF
ON
OFF
ON
OFF
10ms 60ms60ms
Base circuit
Servo-on command
(from controller)
SON accepted
Main circuit
Control circuit
power
(3) Forced stop
CAUTION
Install an emergency stop circuit externally to ensure that operation can be
stopped and power shut off immediately.
If the controller does not have an emergency stop function, make up a circuit which shuts off main
circuit power as soon as EM1-SG are opened at a forced stop. To ensure safety, always install a forced
stop switch across EM1-SG. By disconnecting EM1-SG, the dynamic brake is operated to bring the
servo motor to a stop. At this time, the display shows the servo forced stop warning (E6).
During ordinary operation, do not use forced stop signal to alternate stop and run. The service life of
the servo amplifier may be shortened.
Servo amplifier
EM1
SG
VDD
COM
Forced stop