Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 199 / 608

Parameter Adjust the output torque (current) of the motor
FR-E700 SC EC/ENE 6 - 45
Block diagram
Setting of stall prevention operation level (Pr. 22)
Set in Pr. 22 the percentage of the output current to the rated inverter current at which stall preven-
tion operation will be performed. Normally set this parameter to 150% (initial value).
Stall prevention operation stops acceleration (makes deceleration) during acceleration, makes de-
celeration during constant speed, and stops deceleration (makes acceleration) during deceleration.
When stall prevention operation is performed, the OL signal is output.
I001883E
Fig. 6-5: Stall prevention block diagram
I001120E
Fig. 6-6: Stall prevention operation example
NOTE
If an overload status lasts long, an inverter trip (e.g. electronic thermal relay function "E.THM") may
occur.
Pr. 22
Pr. 48
Stall prevention operation invalid
Stall prevention operation level
Output frequency
Pr. 23, Pr. 66
RT = OFF
RT = ON
Pr. 22
Output current
Ac
celer
ation
De
celera
tion
Constant speed
Output frequency
OL
Time