Yaskawa VS-626 MC5 - Manual (Page 190)

Advanced Operation
7.3.6 Protective Functions: L
- 52
Output current
Time
L3-02 (Acceleration stall prevention level)
Output frequency
Time
The output frequency is controlled to prevent stalling.
Fig
7.30 Acceleration Stall Prevention Function: L3-01 = 1
Stall Prevention Limit During Acceleration: L3-03
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
during
Opera-
tion
Setting
Range
Unit
Factory
Setting Open Loop
Vector
Flux Vector
L3-03
Stall prevention limit
during accel
0 to 100 % 50 A
D Normally it isn’t necessary to change this setting.
D Set this constant when a high-speed motor is being used in the high-speed range (the high frequency
range above the base frequency).
D The standard target setting is the motor’s rated current. Set this current value as a percentage of the
Inverter’s rated current, i.e., 100% corresponds to the Inverter’s rated current.
E1-06
Base frequency (F A )
Acceleration stall
prevention level L3-02
(Acceleration stall preven-
tion level)
L3-03
(Acceleration stall prevention
limit)
Output frequency
Note When the motor is used in the high-speed range, the acceleration stall prevention level
is automatically lowered to provide smoother acceleration.
The acceleration stall prevention limit (L3-03) limits how much the acceleration stall
prevention level is lowered so that it isn’t lowered any more than necessary.
Fig
7.31 Stall Prevention Limit During Acceleration
7