Chziri ZVF200-M User Manual page 37

In applications where inertia is low, over-voltage during
deceleration would not occur. When inertia is high, the
AC drive will automatically extend the deceleration
TIP
period. If a faster stop is needed, then a dynamic brake
resistor should be used.
Fig.6-7 Over-voltage Stall Prevention
Over-Current Stall Prevention during Acceleration
P 26
20 to 200%
Settings
00 disable
A setting of 100% is equal to the Rated Output Current of the drive.
Under certain conditions, the AC drive output current may increase
abruptly, and exceed the value specified by P26. This is commonly
caused by rapid acceleration or excessive load on the motor. When
this function is enabled, the AC drive will stop accelerating and
maintain a constant output frequency. Drive will resume accelerating
only after the current drops below the setting for P26.
-68-
Chapter 6 Parameters
Factory Setting 150%
Over-Current Stall Prevention during Operation
P 27
20 to 200%
Settings
00 disable
During a steady-state operation with the motor load rapidly increasing,
the AC drive output current may exceed the limit specified in P27.
When this occurs, the output frequency will decrease to maintain a
constant motor speed. The drive will accelerate to the steady-stat e
output frequency only when the output current drops below the setting
for P27.
Over-current Stall Prevention
during Acceleration
Fig.6-8 Over-current Stall Prevention during Acceleration
DC Braking Current Level
P 28
Settings
00 to 100%
This parameter determines the amount of DC Braking Current applied
to the motor during starting and stopping. When setting the DC Braking
Current, please note that 100% corresponds to the rated current of the
AC drive. It is recommended to start with a low DC Braking Current
level and then increase it until proper holding torque has been attained.
-69-
Chapter 6 Parameters
Factory Setting 150%
Over-current Stall Prevention
during Operation
Factory Setting
00