Setting of stall prevention operation level (Pr.22)
Stall prevention operation example
• A continuous overloaded condition may activate a protective function such as motor overload trip (electronic thermal O/L relay
• When Pr.156 is set to activate the fast-response current limit (initial value), the Pr.22 setting should not exceed 170%.
Otherwise, the torque may be insufficient.
5.6 (H) Protective function parameter
Pr.22 Stall prevention operation level
output current to the inverter rated current at which the stall
prevention operation is activated. Normally, this should be
set at 150% (initial value).
• Stall prevention operation stops acceleration (makes
deceleration) during acceleration, makes deceleration
during constant speed, and stops deceleration during
• When the stall prevention operation is performed, the
Overload warning (OL) signal is output.
, set the ratio of the