Yaskawa E7 Drive User Manual - Manual (Page 116)

Programming 5 - 42
Fig 5.32 Detailed Time Chart for Stall Prevention During Acceleration
If L3-01= “2: Intelligent”, the intelligent stall prevention is enabled. The active acceleration time is ignored and the Drive will
attempt to accelerate as quickly as possible without exceeding the L3-02 output current level.
The following figure demonstrates acceleration when L3-01= “1: General Purpose”.
Fig 5.33 Time Chart for Stall Prevention During Acceleration
The L3-02 parameter is set as a percentage of the Drive rated output current. If the motor capacity is small compared to the
Drive’s capacity, or if the motor stalls during acceleration, lower the set value of L3-02.
IMPORTANT Stall Prevention during Acceleration is not effective when the output frequency is less than 6Hz.
Stall level during
acceleration
Time
Time
Output frequency
Output frequency is controlled
to prevent the motor stalling.
-15%
Output Current
Output
Frequency
Output
Current
a - Set accel time
b - Accel time is extended
L3-02
t
a b
t
a b
TIME
TM_E7_01_07182008.book Page 42 Wednesday, July 23, 2008 2:35 PM