3. SIGNALS AND WIRING
3 - 8
3.3.2 Power-on sequence
POINT
A voltage, output signal, etc. of analog monitor output may be irregular at power-
on.
(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
1
, L
2
, L
3
, single-phase: L
1
, L
2
). Configure an external
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
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) of this section.)
(2) Timing chart
Servo-on command accepted
ON
OFF
Main circuit
Control circuit
ON
OFF
Base circuit
ON
OFF
Servo-on command
(from controller)
power
95ms
(3s)
95ms
10ms
(3) Forced stop
CAUTION
Install an forced stop circuit externally to ensure that operation can be stopped and
power shut off immediately.
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.
(Note)
Servo amplifier
DICOM
EM1
24VDC
Forced stop
Note. For the sink I/O interface. For the source I/O interface, refer to section 3.7.3.
Summary of Contents for MELSERVO-J3W Series
Page 17: ...8 MEMO ...
Page 27: ...1 FUNCTIONS AND CONFIGURATION 1 10 MEMO ...
Page 87: ...4 STARTUP 4 14 MEMO ...
Page 117: ...5 PARAMETERS 5 30 MEMO ...
Page 129: ...6 GENERAL GAIN ADJUSTMENT 6 12 MEMO ...
Page 185: ...10 CHARACTERISTICS 10 8 MEMO ...
Page 241: ...11 OPTIONS AND AUXILIARY EQUIPMENT 11 56 MEMO ...
Page 274: ...13 USING A LINEAR SERVO MOTOR 13 25 1 2 3 4 ...