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User Switches C1 Submenu
98
RECOMMENDED TRAVEL DIRECTION
(Recommended Travel Direction)
The recommended travel direction feature is
designed to allow the drive the ability to
determine the lightest loaded travel direction,
and communicate this information to the car
controller. The car controller can then use this
information to decide whether to instruct the
drive to run in that direction (drive will not
automatically run in the direction of the lightest
load, it requires the controller to dictate a
directional speed command).
This is intended primarily for use in emergency
evacuations runs when the mains power is not
available and the drive and controller are
running on UPS backup. This should ensure
that the running current for the evacuation run
is as low as possible, and hence use the least
possible power from the UPS.
Geared Machines
1. To activate the Recommended Travel
Direction function with Travel Dir (C1) set
to geared, the drive will expect a drive
enable, run, a directional input, and Rec
Travel input signals.
2.
The brakes should then lift to allow the
drive to determine the direction of the
lightest load.
3. The drive will then rotate the the motor in
the forward direction at the speed set in
Travel Dir Spd (A4) regardless of speed
command for the amount of time set in
Load Sense Time (A4).
4. Then the drive will start to spin the motor in
the reverse direction at the speed set in
Travel Dir Spd (A4) regardless of speed
command for the amount of time set in
Load Sense Time (A4).
5. The drive will then announce with Logic
Outputs (C3) Rec Travel On that it has
sucessfully determine a direction ( if it was
not successful, increase the Load Sense
Time (A4) ).
6. When the Rec Travel On (C4) output is
high, the state of Rec Travl Dir (C3) will be
the direction that the drive suggests the
elevator should go for the lightest load.
a. If Rec Travl Dir (C3) remains low, the
controller should continue running in the
same direction.
b. If Rec Travl Dir (C3) goes high, the
controller should immediately drop the
original direction input and instead issue
the opposite direction.
7. The drive then requires that the controller
makes a desion on which direction that the
elevator should run at with the drive’s
recommendation. NOTE: the drive WILL
try to run at the speed and direction that
the controller tells it to regardless of what
the drive thinks the lightest load is.
Gearless Machines
1. To activate the Recommened Travel
Direction function with Travel Dir (C1) set
to gearless, the drive will expect a drive
en, run, a directional input, and Rec Travel
input signals.
2. The brakes should then lift to allow the
drive to determine the direction of the
lightest load.
3. The drive will force the motor to hold 0fpm
regardless of speed command for the
amount of time set in Load Sense Time
(A4) because the motor is direct drive to
the sheave.
4. The drive will then announce with Logic
Outputs (C3) Rec Travel On that it has
successfully determine a direction ( if it
was not successful, increase the Load
Sense Time (A4) ).
5. When the Rec Travel On (C4) output is
high, the state of Rec Travl Dir (C3) will be
the direction that the drive suggests the
elevator should go for the lightest load.
a. If Rec Travl Dir (C3) remains low, the
controller shold continue running in the
same direction.
b. If Rec Travl Dir (C3) goes high the
controller should immediately drop the
original direction input and instead issue
the opposite direction.
6. If the controller does not change which
inputs it gives to the drive, then the drive
will continue to run as normal in the
direction requested.
If the controller changes which run
direction it gives the drive as an input, the
drive will stop, and then start again with
the run commanded in the opposite
direction. If the Rec Travel en input is still
issued to the drive, it will once again try
and determine the lightest direction of
travel.
Содержание HPV 900 Series 2
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