Testing Method for Offline Operation of Mitsubishi MR-J3 Servo Driver Maintenance Board

When repairing Mitsubishi servo drives, encountering damaged modules is common. After repairing such modules, it’s crucial to test the drive board’s output function offline before reinstallation. This article provides a detailed guide for testing a repaired Mitsubishi MR-J3-350A/3.5KW servo module.

Preparation for Offline Testing:

1. Power Connection: Connect 300V DC voltage to power boards P2 and N to avoid E9 fault after power-on.
2. Module Pad Hole Shielding:
   • Connect the 10 pins of the module pad hole to N.
   • Connect pad holes U, V, W to N to prevent AL24 fault.
   • Connect pad holes EV, EU, EW (upper axle drive trigger) to N.

Parameter Setting Before Running:

1. Change PA01: Set PA01 to 0002.
2. Change PD01: Set PD01 to 0000.
3. Power Board Connection: Connect P and D on the power board.
4. Additional Power Board Connections: Connect L1 to L11 and L2 to L12 on the power board.
   • If PD parameters are not visible, change PA19 to 000C and power on again.

Testing Process:

• After following the above steps, power on and run the servo to test its 6-way waveform.
• During parameter waveform testing, manually rotate the motor shaft to observe changes in pulse width and phase in the waveform. Note that this machine does not have a static cut-off negative voltage.

By following this comprehensive guide, you can effectively test the offline operation of a repaired Mitsubishi MR-J3 servo driver maintenance board, ensuring its functionality before reinstallation.