Power-On Sequence - Mitsubishi Electric MELSERVO-J3 Series Handbook

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_

4.2 Power-on sequence

(1) MR-J3-DU_ A
(a) Power-on procedure
1) Make sure to wire the power supply as shown in above section 4.1 using the magnetic contactor
with the main circuit power supply (3-phase: L1, L2, L3). Configure up an external sequence to
switch off the magnetic contactor as soon as an alarm occurs.
2) In the case where control function of the magnetic contactor for the converter unit is enabled, turn
on control circuit power supply (L11 and L21) for the converter unit and the drive unit at the same
time. After the converter unit and the drive unit are activated, main circuit power supply
automatically turns on. When controlling the magnetic contactor by the external sequence, turn
on the control circuit power supply (L11 and L21) for the converter unit and the drive unit
concurrently with the main circuit power supply or before switching on the main circuit power
supply. However, by switching on the main circuit power supply, the warning disappears and the
drive unit will operate properly.
Servo motor speed
Drive unit control
power supply
Converter unit control
power supply
Main circuit
power supply
Base circuit
Electromagnetic
brake interlock (MBR)
Servo-on (SON)
Position command
(Note 3)
Note 1. When setting up an electromagnetic brake at customer's side, make up a sequence which will operate the
2. Give a position command after the external electromagnetic brake is released.
3. For the position control mode.
4. "Tb" is a delay time from when the electromagnetic brake interlock (MBR) is turned off until when the
0r/min
ON
OFF
ON
OFF
ON
OFF
ON
OFF
(Note 1) ON
OFF
ON
OFF
0r/min
electromagnetic brake as follow using the electromagnetic brake interlock (MBR).
ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated
base circuit is shut off at servo off. Set Tb using [Pr. PC16].
(3s)
(Note 2)
5 - 21
(Note 4)
Tb
(95ms)