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LP - Positioning Parameters
These parameters are used to congure the position controller in the drive. In
order to use this function, the elevator control must be designed to give the
proper signal sequence ensuring correct operation.
The general restrictions for using positioning control are as follows:
- The US04 Control Type must be set for Binary or Digital Speed Selection.
- There must be an encoder on the motor and that encoder must be
connected to interface X3A.
Before each run at high speed the drive must be disabled and re-enabled
to reset the position control.
- Re-leveling can occur at the end of the run without dropping the enable
signal.
Principle of operation:
When LP01 Positioning Control = Posi One Floor and high speed is selected
at the beginning of the run, the drive enters positioning active (PA) mode
and starts to accelerate the car up to high speed. When the car passes the
slowdown sensor in the hoist way, the controller turns off the high speed
command to the drive. At this moment the drive recognizes that the car is at
the learned LP03 High Speed Slowdown Distance and then proceeds to create
a slowdown prole to bring the car to leveling speed.
If the car is running at high speed, the drive simply calculates the deceleration
prole based on the adjusted values in LS23, LS24 and LS25, and then
decelerates the car accordingly down to leveling speed. Once at leveling speed,
the elevator runs until oor level is reached and then the leveling speed and
direction are turned off causing the elevator to stop.
If the car is still accelerating (<80% contract speed) when the slowdown is
reached (e.g. one oor run), the drive realizes this and calculates a prole to
continue the acceleration, up to the maximum high speed and then proceeds
to decelerate the elevator down to leveling speed.
Similar to high speed operation, Intermediate Speed 1 can be used as a
reduced, short oor speed and will have a corresponding LP04 Short Floor
Slowdown Distance and will follow the deceleration prole in LS33, LS34 and
LS35.
6.10 LP - Positioning Parameters
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