Learning Protection Features
Pr.51 Stall
Freq 1 ~
Pr.58 Stall
Level 4
Additional stall protection levels can be configured for different frequencies,
based on the load type. As shown in the graph below, the stall level can be
set above the base frequency. The lower and upper limits are set using
numbers that correspond in ascending order. For example, the range for Stall
Frequency 2 (Stall Freq 2) becomes the lower limit for Stall Frequency 1 (Stall
Freq 1) and the upper limit for Stall Frequency 3 (Stall Freq 3).
Stall protection and flux braking operate together only during deceleration. Turn on the
third and fourth bits of Pr.50 (Stall Prevention) to achieve the shortest and most stable
deceleration performance without triggering an overvoltage fault for loads with high
inertia and short deceleration times. Do not use this function when frequent deceleration
of the load is required, as the motor can overheat and may be damaged easily.
When operating Brake resistor, the motor may vibrate under the Flux braking operation. In
this case, please turn off the Flux braking (Pr.50).
• Use caution when using stall protection during deceleration as the deceleration time
can take longer than the time set. Acceleration stops when stall protection operates
during acceleration.
• When the motor is operating, Stall Level 1 applies and determines the operation of stall
protection.
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