Frequency jump (Pr.31 to Pr.36)
• Up to three areas may be set, with the jump frequencies set to either the top or bottom point of each area.
• The settings of frequency jumps 1A, 2A, and 3A are the jump points, and operation is performed at these frequencies in
the jump areas.
Set frequency after
Input set frequency (Hz)
Example 1) To fix the frequency to 30 Hz in the range of 30 Hz to 35 Hz, set 35 Hz in
Example 2) To change the frequency to 35 Hz in the range of 30 Hz to 35 Hz, set 35 Hz in
Parameters referred to
Pr.1 Maximum frequency, Pr.2 Minimum frequency, Pr.18 High speed maximum frequency
Stall prevention operation
This function monitors the output current and automatically changes the output frequency to prevent the inverter from shutting
off due to overcurrent, overvoltage, etc. It can also limit the stall prevention and fast-response current limit operation during
acceleration/deceleration and power/regenerative driving.
• Stall prevention: If the output current exceeds the stall prevention operation level, the output frequency of the inverter is
automatically changed to reduce the output current.
• Fast-response current limit: If the current exceeds the limit value, the output of the inverter is shut off to prevent an
compensation factor at
OL signal output timer
0.1 to 200%
0 to 31, 100, 101
0 to 200%
0 to 400 Hz
0 to 25 s
and 30 Hz in
Stall prevention operation disabled.
Set the current limit at which the stall prevention operation
Enable/disable the stall prevention operation and the fast-
response current limit operation.
The stall operation level can be reduced for operation at the
rated frequency or higher.
Stall prevention operation disabled at double speed.
Set the frequency at which the stall operation level reduction
Set the OL signal output start time when stall prevention is
No OL signal output.
5.6 (H) Protective function parameter
and 30 Hz in