Delta MS300 Series User Manual page 365

Chapter 12 Descriptions of Parameter SettingsMS300
 OV stall corresponds to the over-voltage level:
Voltage
230V models
460V models
575V models
 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)
Pr.06-02 Selection for Over-voltage Stall Prevention.

06-02 Selection for Over-Voltage Stall Prevention

Settings
 Use this function when you are unsure about the load inertia. When stopping under normal load,
the over-voltage does not occur during deceleration and meet the deceleration time setting.
Sometimes it may not stop due to over-voltage during decelerating to STOP when the load
regenerative inertia increases. In this case, the AC motor drive extends the deceleration time
automatically until the drive stops.
 When you set Pr.06-02 to 0, during deceleration the motor exceeds the synchronous speed due
to load inertia. In this case, the motor becomes an electrical generator. The DC bus voltage may
exceed its maximum allowable value due to motor regeneration in some situations, such as
motor's loading inertia being too high or drive's deceleration time being set too short. When you
enable traditional over-voltage stall prevention and the DC bus voltage detected is too high, the
drive stops decelerating (output frequency remains unchanged) until the DC bus voltage drops
below the setting value.
Default
380.0 V
DC
760.0 V
DC
975.0 V
DC
0: Traditional over-voltage stall prevention
1: Smart over-voltage stall prevention
OV Stall
Setting Range
0.0–400.0 V
0.0–800.0 V
0.0–1000.0 V
356
OV Level
Default (Read Only)
410.0 V
DC
820.0 V
DC
1020.0 V
DC
Default: 0
DC
DC
DC