Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 417

• Set Pr.154 = "10 or 11" when the overvoltage protective function (E.OV[]) is activated during stall prevention operation in
an application with large load inertia. Note that turning OFF the start signal (STF/STR) or varying the frequency command
during stall prevention operation may delay the acceleration/deceleration start.
Pr.154
0 Enabled
1 (initial value) —
10 Enabled
11 —
CAUTION
• Do not set the stall prevention operation current too low.
Doing so will reduce the generated torque.
• Be sure to perform the test operation.
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.22 Torque limit levelpage 235
Pr.73 Analog input selectionpage 473
Pr.178 to Pr.189 (Input terminal function
Pr.190 to Pr.196 (Output terminal function
Pr.858 Terminal 4 function assignment, Pr.868 Terminal 1 function
416
5. PARAMETERS
5.10 (H) Protective function parameter
E.OC[] countermeasure
selection)page 496
selection)page 450
E.OV[] countermeasure
—
—
Enabled
Enabled
assignmentpage 477