Mitsubishi Electric FR-E800 Instruction Manual page 336

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 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

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 equal to or

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

Output current

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.

Output frequency

• 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.

11. (H) Protective Function Parameters

11.12 Stall prevention operation

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