Mitsubishi Electric Melservo MR-J3-100B, Handbook

Page: 221 / 590

Part 5: Review on Replacement of MR-J3-DU_ with MR-J4-DU_
5 - 26
(4) MR-J4-DU_B_
(a) Power-on procedure
1) Always use a magnetic contactor for the main circuit power supply wiring (L1/L2/L3) as shownin
above section 4.1. Configure an external sequence to switch off the magnetic contactor as soon
as an alarm occurs.
2) Turn on the control circuit power supplies (L11/L21) of the converter unit and drive unit
simultaneously with the main circuit power supply or before turning 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 drive
unit will operate properly.
(b) Timing chart
1) When magnetic contactor drive output is enabled and the status remains at ready-on
The main circuit power is not shut off with servo-off.
ON
OFF
Main circuit
power supply
ON
OFF
Servo-on command
(from servo system
controller)
(95 ms)
ON
OFF
Base circuit
(3 s)
(Note 4)
Tb
ON
OFF
ON
OFF
(Note 1) ON
OFF
MBR
(Electromagnetic
brake interlock)
0 r/min
Servo motor
speed
0 r/min
Position command
(Note 3)
(Note 2)
Resistance regeneration
converter unit
Control circuit
power supply
Drive unit
Control circuit
power supply
Note 1. When setting up an electromagnetic brake at customer's side, make up a sequence which will operate
the electromagnetic brake as follow using MBR.
ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated.
2. Give a position command after the external electromagnetic brake is released.
3. This is in position control mode.
4. In [Pr. PC02 Electromagnetic brake sequence output], set a delay time (Tb) from MBR off to base circuit
shut-off at a servo-off.