Delta VFD1A5MS43ANSAA User Manual

Chapter 12 Descriptions of Parameter SettingsMS300
356
 OV stall corresponds to the over-voltage level:
Voltage
OV Stall
OV Level
Default
Setting Range
Default (Read Only)
230V models
380.0 V
DC
0.0–400.0 V
DC
410.0 V
DC
460V models
760.0 V
DC
0.0–800.0 V
DC
820.0 V
DC
575V models
975.0 V
DC
0.0–1000.0 V
DC
1020.0 V
DC
 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
Default: 0
Settings
0: Traditional over-voltage stall prevention
1: Smart over-voltage stall prevention
 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.

Delta VFD1A5MS43ANSAA Specifications

General

Brand	Delta
Model	VFD1A5MS43ANSAA
Category	DC Drives
Language	English