Mitsubishi Electric FR-A700 Instruction Manual page 337

Parameter
Setting of stall prevention operation level (Pr. 22)
Set in Pr. 22 the ratio of the output current to the rated inverter current at which stall prevention
operation will be performed. Normally set 150% (initial value).
Stall prevention operation stops acceleration (makes deceleration) during acceleration, makes
deceleration during constant speed, and stops deceleration during deceleration.
When stall prevention operation is performed, the OL signal is output.
Fig. 6-48: Stall prevention operation example
NOTES
If an overload status lasts long, an inverter trip (e.g. electronic thermal relay function
"E.THM") may occur.
When Pr. 156 has been set to activate the fast-response current limit (initial setting), the
Pr. 22 setting should not be higher than 170%. The torque will not be developed by doing so.
(When Pr. 570 = 2).
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 00126 or less, the Pr. 22 set-
ting changes from 150% (initial value) to 200%.
FR-A700 EC
Pr. 22
OL
Adjust the output torque of the motor (current)
Output current
Output frequency
Constant speed
Time
I001120E
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