Delta C2000 Series User Manual page 355

Selection for Over-voltage Stall Prevention
Settings 0: Traditional over-voltage stall prevention
1: Smart over-voltage prevention
This function is used for the occasion that the load inertia is unsure. When it stops in the normal
load, the over-voltage won't occur during deceleration and fulfill the setting of deceleration time.
Sometimes, it may not stop due to over-voltage during decelerating to stop when increasing the
load regenerative inertia. At this moment, the AC drive will auto add the deceleration time until
drive stop.
Pr 06-02 is set to 0: During deceleration, the DC bus voltage may exceed its maximum allowable
value due to motor regeneration in some situation, such as loading inertia is too high or Decel.
Time is set too short. When traditional over-voltage stall prevention is enabled, the drive will not
decelerate further and keep the output frequency constant until the voltage drops below the setting
value again.
When Pr 06-02 is set to 1, the drive will maintain DCbus voltage when decelerating and prevent OV.
High-voltage
at DC si de
Ov er-v ol tage
detec ti on
level
Output
frequency
requir ed time for decelerating to 0Hz when over- voltage
stall prevention is enabled.
0
Chapter 12 Description of Parameter Settings C2000 Series
Deceleration c har acteristic
when Ov er-Voltage Stall
Pr ev ention enabled
previous deceleration time
60Hz
370Vdc
230V Series
12-06-2
Output Frequency
DCBUS Voltage
310Vdc
Time
Factory Setting: 0
Time
F requenc y Held
Time