M O T I O N
Variable speed selection:
All values are referred to in HEX.
Before a run, the speed (fast, medium or slow) is selected after calculating the distance to the selected floor.
•
Rated (max) speed is selected when (Stf + Slf)
<
the commencing floor run hex value.
•
Medium speed is selected when (Stf + Slf)
>
the commencing floor run and (Stm + Slm)
<
the
commencing floor run hex value.
•
Slow or leveling speed (depending on DRV setting) shall be selected when (Stm + Slf)
>
the commencing
floor run hex value.
On EEprom DRV setting 03;
•
Fast speed is selected by DF and UF relay. The relay contacts are used for the max/rated speed input to the
drive.
•
Medium or intermediate speed is selected by SP2 relay. The relay contacts are used for the intermediate speed
input to the drive.
Example:
Speed selection. Nb: HEX calculator recommended
A lift needs to travel from level 1 to level 2.
Level 2 hex count = 12C.
Level 1 hex count = 40.
Distance between level 1 and 2 is 12C – 40 =
EC.
(the commencing floor run hex value)
Assuming equal accel and decel rates and lift slows as soon as the rated speed is reached, the minimum distance
required for a fast speed run will be
5A(Stf) + 5A(Slf) = B4
As shown in Fig 6a, B4 is less than EC, which means the processor will calculate that the full speed relay
can
be
picked for a run between level 1 and 2. Ie, rated (max) speed is selected when Stf + Slf (B4)
<
the commencing
floor run hex value (EC).
Pulses to get to Fast speed (Stf) + Pulses to slow from Fast speed (Slf) = distance required for a fast speed run.
Stf = 5A
Slf = 5A
Distance between floors = EC
DISTANCE
SPEED
rated speed
lvl 1
lvl 2
B4
Fig 6a.
(Ref. TurboCad – Pulse Graphs)
--------------------------------------------------------------------------------------------------------------
A run from level 1 to 2 will look like the following graph, Fig 6b;
