Mitsubishi Electric FR-F820-00077 Instruction Manual page 360

(H) Protective function parameter
NOTE Under V/F control or Advanced magnetic flux vector control, if the output frequency drops to
0.5 Hz due to the stall prevention operation and this state continues for 3 s, a fault indication
(E.OLT) appears, and the inverter output is shut off. This operation is activated regardless of the
Pr. 874 setting.
CAUTION:
E
● Do not set the stall prevention operation current too low.
Doing so will reduce the generated torque.
● Be sure to perform a test run.
Stall prevention operation during acceleration may extend the acceleration time.
Stall prevention operation during constant-speed operation may cause sudden speed
changes.
Stall prevention operation during deceleration may extend the deceleration time.
Parameters referred to
Pr. 73
Pr. 178 to Pr. 189
Pr. 190 to Pr. 196
Pr. 858
Pr. 868
5 - 188
Analog input selection
(Input terminal function selection)
(Output terminal function selection)
Terminal 4 function assignment
Terminal 1 function assignment
Parameters
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