Mitsubishi Electric 800 Series Instruction Manual page 334

Setting the stall prevention operation level (Pr.22)
Pr.22
Constant
speed
OL
Stall prevention operation example
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 will prevent torque generation
• When Real sensorless vector control or vector control is selected using Pr. 800 Control method selection, Pr.22 serves as
torque limit level.
For the FR-A860-00090 or lower, the initial value of Pr.22 is 200% instead of 150%.
• For Pr.22 Stall prevention operation level, set the ratio of the output
Output current
current to the inverter's rated current at which the stall prevention operation
will be 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.
Time
• When the stall prevention operation is performed, the Overload warning
(OL) signal is output.
(H) Protective function parameter
PARAMETERS
5
GROUP
H
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