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
SAFETY MARGIN defines what percentage of parameter
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
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
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
LV STOP SWC DIST
Stop switch
Leveling
switch
Safety distance
Summary of Contents for ACL30
Page 1: ...ABB high performance elevator drives User s manual ACL30 elevator drive ...
Page 4: ......
Page 20: ...20 Safety instructions ...
Page 34: ...34 Operation principle and hardware description ...
Page 42: ...42 Planning the cabinet installation ...
Page 60: ...60 Planning the electrical installation ...
Page 126: ...126 Using the control panel ...
Page 318: ...318 Maintenance ...
Page 334: ...334 The Safe torque off function ...
Page 338: ...338 Mains chokes ...
Page 342: ...342 EMC filters ...
Page 348: ...Dimension drawings 348 Frame size B D1 D2 W H1 H2 ...
Page 349: ...Dimension drawings 349 ...
Page 350: ...Dimension drawings 350 Frame size C D1 D2 H2 H1 W ...
Page 351: ...Dimension drawings 351 ...
Page 352: ...Dimension drawings 352 Frame size D ...
Page 354: ...354 Dimension drawings EMC filters JFI 0x ...
Page 356: ...356 Dimension drawings Brake resistors JBR xx ...
Page 358: ...358 Dimension drawings ...