157
11.1 One Floor Position
Control
These parameters are used to con gure 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.
This parameter turns the position controller on and off and also is used
to activate the teach function.
Settings
OFF: Drive operates as a standard unit without
positioning control
tEAch: Used to learn the slowdown distance
P onE: One oor positioning is active
The general restrictions for using positioning control are as
follows:
- The control mode in LF.2 must be bnSPd
- There must be an encoder on the motor and that encoder must be
connected to interface X3A.
- Emergency Power Modes (LF.61 = SPd1, SPd2, SPd3,) are not
available.
- 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 LP.1 = P onE 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 and activates either leveling or high leveling. At this moment the
drive recognizes that the car is at the learned slowdown distance and then
proceeds to create a slowdown pro le to bring the car to the oor.
If the car is running at contract speed, the drive simply calculates the
decel pro le based on the adjusted values in LF.53, LF.54, LF.55, 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. on a one oor run), the drive realizes this and calculates
a pro le to continue the acceleration, up to a calculated max. one oor
speed and then proceeds to decelerate the elevator down to leveling
speed. In this case the alternate in distance adjusted in LP.4 is used.
LP.1
One oor positioning
11.0 Position Control
i
To Next Page
Loading...
Need help?
General