Power-On Sequence - Mitsubishi Electric MR-J2S-CP Instruction Manual

3. SIGNALS AND WIRING

3.7.3 Power-on sequence

(1) Power-on procedure
1) Always wire the power supply as shown in above section 3.7.1 using the magnetic contactor with
the main circuit power supply (three-phase 200V: L
100V: L , L ). Configure up an external sequence to switch off the magnetic contactor as soon as an
1 2
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 (SON) about 1 to 2s after the main circuit power supply
is switched on. Therefore, when servo-on (SON) is switched on simultaneously with the main circuit
power supply, the base circuit will switch on in about 1 to 2s, and the ready (RD) will switch on in
further about 20ms, making the servo amplifier ready to operate. (Refer to paragraph (2) of this
section.)
4) When the reset (RES) 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
(SON)
Reset
ON
OFF
(RES)
Ready
ON
(RD) OFF
(3) Forced stop
CAUTION
Forced stop (EMG) can be used by making device setting on the MR Configurator (servo configuration
software).
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.
Forced stop
SON accepted
(1 to 2s)
10ms
20ms 10ms
Provide an external forced stop circuit to ensure that operation can be stopped and
power switched off immediately.
Servo amplifier
VDD
COM
EMG
SG
, L , L , single-phase 230V
1 2 3
, L simultaneously with the main circuit power
11 21
10ms
60ms
20ms 10ms
3 - 28
single-phase
60ms
20ms 10ms