Mitsubishi Electric FR-F800 Instruction Manual page 517

(G) Control parameters
NOTE
• During the regeneration avoidance operation, the stall prevention (overvoltage) (oL) is displayed and the overload alarm (OL)
signal is output. The operation when the OL signal is output can be set with Pr.156 Stall prevention operation selection.
The OL signal output timing can be set with Pr.157 OL signal output timer.
• The stall prevention is enabled even at the time of regeneration avoidance operation.
• The regeneration avoidance function cannot decrease the actual deceleration time for the motor to stop. The actual
deceleration time is determined by the regenerative power consumption performance, so to decrease the deceleration time,
consider using a regeneration unit (FR-BU2, BU, FR-BU, FR-CV, FR-HC2).
• When using regeneration unit (FR-BU2, BU, FR-BU, FR-CV, FR-HC2) to consume the regenerative power, set to Pr.882 = "0
(initial value)" (disables regeneration avoidance function). When consuming the regenerative power at the time of
deceleration with the regeneration unit, etc., set to Pr.882 = "2" (enables regeneration avoidance function only at the time of
constant speed).
Parameters referred to
Pr.1 Maximum frequency
Pr.8 Deceleration time page 187
Pr.22 Stall prevention operation level
516
PARAMETERS
page 245
page 248