Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 412

 Setting of 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 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 the FR-A820-00250(3.7K) or lower and the FR-A840-00126(3.7K) or lower, the initial value of Pr.22 is 200% instead of
150%.
• 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, this
should be set at 150% (initial value).
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.
5. PARAMETERS
5.10 (H) Protective function parameter
1
2
3
4
5
6
7
8
9
10
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