Power-On Sequence - Mitsubishi Electric MELSERVO-J2S Series Transition Handbook

Part 5: Review on Replacement of MR-J2S-30 kW or Higher Capacity Models with MR-J4-DU_

2.2 Power-on Sequence

(1) MR-J2S-30 kW or more
(a) Power-on sequence
1) For the power supply wiring, make sure to use a magnetic contactor in the main circuit power
supply as shown in Section 2.1.
Configure so that the magnetic contactor is turned off at the same time as an alarm is generated
in the external sequence.
2) Turn on the control circuit power supply L11/L21 at the same time as or before turning on the
main circuit power supply.
If the main circuit power supply is not turned on, a warning is displayed on the display. However,
the warning disappears and operation returns to normal when the main circuit power supply is
turned on.
3) The servo amplifier can receive SON (servo-on) signals approximately 1 s after the main circuit
power supply is turned on. Therefore, if SON (servo-on) is turned on at the same time as the
3-phase power supply, the base circuit will be turned on after approximately 1 s. After
approximately 20 ms, RD (Ready) is turned on and operation becomes available.
5 - 15