ABB ACL30 User Manual

Program features 147
Smart slowdown
The Smart slowdown function optimizes the travel time of the elevator by reducing
the leveling path. That is, transition from the traveling speed (ie, nominal speed,
medium speed, speed2 or speed 3) to the leveling speed is optimally delayed based
on the knowledge of the physical leveling distance (ie, the distance between the
leveling and stop switches).
The function is useful in operation situations where the desired traveling speed is not
reached before the leveling command is activated (for example, in case of short floor
distance). If the leveling command is activated while the drive is still accelerating, the
achieved speed is maintained and no further acceleration is done.
The figure below illustrates the operation of the function.
Safety distance = Distance traveled with the leveling speed (parameter 82.03
SAFETY MARGIN defines what percentage of parameter 82.02 LV STOP SWC DIST
is used as the safety distance.)
You can enable the Smart slowdown function with estimated speed or with an
encoder using parameter 82.01 SMART SLOWDN SEL.
• When the function is enabled with estimated speed, it measures the distance
traveled by integrating the actual speed (m/s) in meters.
• When the function is enabled with an encoder, it uses actual signal 01.10 POS
ACT to measure the distance traveled.
83.02 LV STOP SWC DIST
Stop
switch
Leveling
switch
Speed (m/s)
Distance (m)
Smart slowdown
enabled
Smart slowdown
disabled
Safety
distance
Distance (m)
Speed (m/s)
Smart slowdown
enabled
Smart slowdown
disabled
82.02 LV STOP SWC DIST
Stop switchLeveling
switch
Safety distance

ABB ACL30 Specifications

General

Brand	ABB
Model	ACL30
Category	DC Drives
Language	English