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Stall Prevention Function Chapter 6-3
6-3 Stall Prevention Function
A stall will occur if the motor cannot keep up with the rotating magnetic field
on the motor stator side when a large load is applied to the motor or a sudden
acceleration/deceleration is performed.
In the J7AZ, stall prevention functions can be set independently for
accelerating, running, and decelerating conditions.
Set Values
• If 1 is set, the motor will be decelerated according to the set deceleration
time. If the deceleration time is too short, the main circuit may result in
overvoltage.
• If 0 is set, the deceleration time will be automatically lengthened to
prevent overvoltage.
n55 Stall Prevention Level during Deceleration Changes during
operation
No
Setting
range
0, 1 Unit of
setting
1 Default setting 0
Value Description
0 Stall prevention during deceleration
1 Stall prevention during deceleration
Stall Prevention during Deceleration with n55 Set to 0
Output
frequency
Deceleration time (Set value)
Deceleration time is controlled
to prevent overvoltage.
Time
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