Operating Instructions

Descriptions of Parameter Settings

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Fig. 68:

● When you set Pr.06-02 to 1 to use smart over-voltage stall prevention during deceleration, the drive maintains

the DC bus voltage when decelerating and prevents the drive from OV.

Fig. 69:

● When you enable the over-voltage stall prevention, the drive’s deceleration time is longer than the setting. If

you encounter any problem with the deceleration time, see the following guides for troubleshooting.

● Increase the deceleration time to a proper value.

● Install a brake resistor (see Brake Resistors and Brake Units Used in AC Motor Drives for details) to dissipate

the electrical energy that is generated from the motor.

● Related parameters:

Pr.01-13, Pr.01-15, Pr.01-17, Pr.01-19 Deceleration Time 1–4, Pr.02-13 Multi-function Output 1 (Relay 1),

Pr.02-16–Pr.02-17 Multi-function Output 2–3 (MO1, MO2), and Pr.06-01 Over-voltage Stall Prevention.