
4-111
08 Protection Parameters
08-00
Stall prevention function Default: 0000b
Range
【
xxx0b
】
: Stall prevention function is enabled during acceleration.
【
xxx1b
】
: Stall prevention function is disabled during acceleration.
【
xx0xb
】
: Stall prevention function is enabled during deceleration.
【
xx1xb
】
: Stall prevention function is disabled during deceleration.
【
x0xxb
】
: Stall prevention function is enabled during operation.
【
x1xxb
】
: Stall prevention function is disabled during run.
【
0xxxb
】
: Stall prevention function during run is based on the first acceleration time.
【
1xxxb
】
: Stall prevention function during run is based on the second acceleration time.
08-01
Stall prevention level during acceleration Default: HD:150, ND:120
Range
【
20–200
】
%
08-02
Stall prevention level during deceleration Default: 395 or 770
Range
240V :
【
330V–410V
】
480V :
【
660V–820V
】
08-03
Stall prevention level during run Default: HD:160, ND:120
Range
【
30–200
】
%
Stall prevention during acceleration (08-00=xxx0b)
Prevents the AC Drive from faulting (Overcurrent, Motor overload, AC Drive overload) when accelerating with heavy
loads.
When the AC Drive output current reaches the level set in parameter 08-01 minus 15% the acceleration rate starts to
decrease. When the AC Drive output current reaches the level set in parameter 08-01 the motor stops accelerating.
Refer to figure below for more information.
Notes:
- Reduce stall prevention level during
acceleration (08-01) in case the
motor stalls (when the motor power
is smaller than the AC Drive rating).
- The AC Drive rated output current
should be set to 100%.
15%
t
Stall prevention
08-01
Inverter
Output
Current
Output
Frequency
t
If the motor is used in the constant power (CH) region, the stall prevention level (08-01) is automatically reduced to
prevent the stall.
Stall prevention level during acceleration (Constant horsepower)
Stall Prev. Lev. Acceleration (CH) = Stall prevention level in acceleration (08-01) x Fbase (01-12)
Output frequency
Motor2 Acceleration Stall Prevention Level (08-40) and Motor2 Acceleration Stall Prevention Limit (08-41) are used
when 03-00 to 03-07=40 (Switching between Motor 1/Motor 2)