M O T I O N
As explained by Fig 6a, fast speed can be selected.
After Stf distance of 5A hex pulses lift is at full speed.
Lift stays at full speed for distance of 38 hex pulses
At a distance of Slf (5A hex pulses) from level 2, the fast speed relay is dropped to initiate the slowdown
(5A + 38 + 5A = EC)
MSU, MSD and DZ inputs are then used to control the final stop.
Stf = 5A
Slf = 5A
Distance between floors = EC
DISTANCE
SPEED
rated speed
lvl 1
lvl 2
38
Fig 6b.
(Ref. TurboCad – Pulse Graphs)
--------------------------------------------------------------------------------------------------------------
If, for example, the drive is adjusted for a quicker decel rate, you can decrease Slf. This lower value allows the lift to
stay at rated speed longer (now distance of 48 hex pulses) by dropping the fast speed relay later (closer to, or 4A
hex pulses from, level 2).
This will mean a faster floor to floor run than Fig 6b.
Nb: If the decel rate is made quicker and Slf is not decreased, the lift will slow down too early, which will result in
long “creep time” into the floor
Stf = 5A
Slf = 4A
Distance between floors = EC
DISTANCE
SPEED
rated speed
lvl 1
lvl 2
48
Fig 6c.
(Ref. TurboCad – Pulse Graphs)
--------------------------------------------------------------------------------------------------------------
The medium or intermediate speed is used for shorter floor(s). See Fig 6d.
Assume the distance between another 2 floors has a hex pulse count of
A6.
A6 is less than B4, which is the minimum count required for a fast speed run.
