Справочник Пользователя для Mitsubishi Electronics MR-J2M-P8B

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3. SIGNALS AND WIRING

3.4.4 Power-on sequence

(1) Power-on procedure

1) Always wire the power supply as shown in above Section 3.4.1 using the magnetic contactor with

the main circuit power supply (3-phase 200V: L

1

, L

2

, L

3

, 1-phase 200 to 230VAC: 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 MELSERVO-J2M will operate properly.

3) Each drive unit can accept the servo-on command within 4s the main circuit power supply is

switched on. (Refer to paragraph (2) in this section.)

(2) Timing chart

(4s)

ON

OFF

ON

OFF

ON

OFF

10ms

100ms

Base circuit 

Servo-on command
(from controller)

SON accepted

Main circuit
Control circuit

power 

100ms 

(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 a forced 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 (A.E6).
During ordinary operation, do not use forced stop (EM1) to alternate stop and run. The service life of
each drive unit may be shortened.

SG

VIN

EM1

Interface unit

24VDC

Forced stop