An automatic control function that corrects minor floor-level discrepancies caused by rope stretch under load by nudging the car precisely to the landing level.
Full Definition
Releveling (or re-levelling) activates when the car sill is not within the defined levelling accuracy (typically ±10 mm) of the floor sill after stopping, due to rope elongation under passenger load changes or hydraulic seepage. The controller detects the floor position error via the encoder or floor sensor and applies a short low-speed drive command to bring the car to within ±5 mm. Releveling happens with doors open and must be inhibited if a safety circuit device is open. EN 81-20 §14.2 requires that releveling movement can only occur with the landing zone active and doors open. The function dramatically reduces trip hazards from sill level differences.
