Power-On Sequence - Mitsubishi Electric MELSERVO-J2-Super Series Instruction Manual

4. SIGNALS AND WIRING

4.7.3 Power-on sequence

(1) Power-on procedure
1) Always wire the power supply as shown in above Section 4.7.1 using the magnetic contactor with
the main circuit power supply (three-phase 200V: L
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
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 (RYn0) about 1 to 2s after the main circuit power supply
is switched on. Therefore, when servo-on (RYn0) is switched on simultaneously with the main
circuit power supply, the base circuit will switch on in about 1 to 2s, and the ready (RXn0) will
switch on in further about 20ms, making the servo amplifier ready to operate. (Refer to paragraph
(2) in this section.)
4) When the reset (RY(n+1)A or RY(n+3)A) is switched on, the base circuit is shut off and the servo
motor shaft coasts.
(2) Timing chart
ON
Power supply
OFF
ON
Base circuit
OFF
Servo-on
ON
OFF
(RYn0)
Reset (RY(n+1)A
ON
OFF
or RY(n+3)A)
Ready
ON
(RXn0) OFF
(3) Forced stop
Make up a circuit which shuts off main circuit power as soon as EMG-SG are opened at a forced stop.
To ensure safety, always install an external forced stop switch across EMG-SG. By disconnecting
EMG-SG, the dynamic brake is operated to bring the servo motor to a sudden stop. At this time, the
display shows the servo forced stop warning (AL.E6).
During ordinary operation, do not use the external forced stop (EMG) to alternate stop and run.
The servo amplifier life may be shortened.
Servo-on (RYn0) accepted
(1 to 2s)
10ms
20ms 10ms
Servo amplifier
VDD
COM
EMG
SG
4 - 20
, L , L , single-phase 230V: L
1 2 3
, L simultaneously with the main circuit power
11 21
10ms
60ms
20ms 10ms
, L ). Configure
1 2
60ms
20ms 10ms