Program features 139Maintenance triggerA maintenance trigger can be activated to show a notice on the panel display when,eg, drive power consumption has exceeded the defined trigger point. SettingsParameter group 29 MAINTENANCE TRIGDC holdWith the motor DC hold feature, it is possibleto lock the rotor at zero speed. When both thereference and the motor speed fall below thepreset DC hold speed, the drive stops themotor and starts to inject DC into the motor.When the reference speed again exceeds theDC hold speed, the normal drive operationresumes. SettingsParameters 2101…2106Speed compensated stopSpeed compensation stop is available, forexample, for applications where a conveyorneeds to travel a certain distance afterreceiving the stop command. At maximumspeed, the motor is stopped normally alongthe defined deceleration ramp. Belowmaximum speed, stop is delayed by runningthe drive at current speed before the motor isramped to a stop. As shown in the figure, thedistance traveled after the stop command isthe same in both cases, that is, area A equalsarea B.Speed compensation can be restricted to forward or reverse rotating direction.Note: The speed compensated stop feature is active only when the used speed ismore than 10% of the maximum speed. SettingsParameter 2102 STOP FUNCTIONMotor speedSpeed referenceDC holdspeedDC holdspeedDC holdt (s)t (s)Motor speedMax.speedUsedspeedt (s)Stop commandarea A = area BAB
