Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 41

3. SIGNALS AND WIRING
3.3.2 Power-on sequence
(1) Power-on procedure
1) Always wire the power supply as shown in above section 3.1 using the magnetic contactor with the
main circuit power supply (three-phase: L
sequence which switches off the magnetic contactor when an alarm occurs in both A and B axes.
2) Switch on the control circuit power supply L
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) of this section.)
(2) Timing chart
(3) Forced stop
CAUTION
If the controller does not have an forced stop function, make up a circuit that switches off main circuit power
as soon as EM1 is turned off at a forced stop. When EM1 is turned off, the dynamic brake is operated to
stop the servo motor. At this time, the display shows the servo forced stop warning (E6.1).
During ordinary operation, do not use forced stop (EM1) to alternate stop and run. The service life of the
servo amplifier may be shortened.
POINT
A voltage, output signal, etc. of analog monitor output may be irregular at power-
on.
ON
Main circuit
power
OFF
Control circuit
ON
Base circuit
OFF
ON
Servo-on command
OFF
(from controller)
Install an forced stop circuit externally to ensure that operation can be stopped and
power shut off immediately.
(Note)
Forced stop
Note. For the sink I/O interface. For the source I/O interface, refer to section 3.7.3.
, L , L , single-phase: L
1 2 3
, L simultaneously with the main circuit power supply
11 21
Servo-on command accepted
(3s)
95ms
24VDC
DICOM
3 - 8
, L ). Configure an external
1 2
10ms
Servo amplifier
EM1
95ms