15111.1 One Floor PositionControlThese parameters are used to configure the position controller inthe drive. In order to use this function, the elevator control mustbe designed to give the proper signal sequence ensuring correctoperation.This parameter turns the position controller on and off and also is usedto activate the teach function.SettingsOFF: Drive operates as a standard unit withoutpositioning controltEAch: Used to learn the slowdown distanceP onE: One floor positioning is activeThe general restrictions for using positioning control are asfollows:- The control mode in LF.2 must be bnSPd- There must be an encoder on the motor and that encoder must beconnected to interface X3A.- Emergency Power Modes (LF.61 = SPd1, SPd2, SPd3,) are notavailable.- Before each run at high speed the drive must be disabled and re-enabled to reset the position control.- Re-leveling can occur at the end of the run without dropping theenable signal.Principle of operation:When LP.1 = P onE and high speed is selected at the beginning of therun, the drive enters positioning active (PA) mode and starts to acceleratethe car up to high speed. When the car passes the slowdown sensorin the hoist way, the controller turns off the high speed command to thedrive and activates either leveling or high leveling. At this moment thedrive recognizes that the car is at the learned slowdown distance and thenproceeds to create a slowdown profile to bring the car to the floor.If the car is running at contract speed, the drive simply calculates thedecel profile based on the adjusted values in LF.53,LF.54,LF.55, and thendecelerates the car accordingly down to leveling speed. Once at levelingspeed, the elevator runs until floor level is reached and then the levelingspeed and direction are turned off causing the elevator to stop.If the car is still accelerating (<80% contract speed) when the slowdownis reached (e.g. on a one floor run), the drive realizes this and calculatesa profile to continue the acceleration, up to a calculated max. one floorspeed and then proceeds to decelerate the elevator down to levelingspeed. In this case the alternate in distance adjusted in LP.4 is used.LP.1One floor positioning11.0 Position Controli
