Mitsubishi Electric FR-E800, Instruction Manual

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11. (H) Protective Function Parameters
11.10 Stall prevention operation
 Setting of stall prevention operation level (Pr.22)
NOTE
• A continuous overloaded condition may activate a protective function such as motor overload trip (electronic thermal O/L relay
function) (E.THM).
• When Pr.156 has been set to activate the fast response current limit (initial value), the Pr.22 setting should not be higher than
170%. Such setting prevents torque generation.
• When Real sensorless vector control or Vector control is selected using Pr.800 Control method selection , Pr.22 serves as
the torque limit level.
• For Pr.22 Stall prevention operation level , set the ratio
of the output current to the inverter's rated current at which
the stall prevention operation is activated. Normally, use
this parameter in the initial setting.
• Stall prevention operation stops acceleration (makes
deceleration) during acceleration, makes deceleration
during constant speed, and stops deceleration during
deceleration.
• When the stall prevention operation is performed, the
Overload warning (OL) signal is output.
Stall prevention operation example
Pr.22
OL
Output current
Output frequency
Acceleration
Constant
speed
Deceleration
Time