Danfoss VLT AutomationDrive FC 301 Programming Manual page 265

Parameter Descriptions
17-77 Position Feedback Mode
Option: Function:
Scale Numerator,
parameter 7-95 Position PI Feebback
Scale Denominator,
parameter 17-72 Position Unit
Numerator, and
parameter 17-73 Position Unit
Denominator. If the position
exceeds the measuring range of the
encoder, the absolute position
reference is lost.
For example, use this option if
there is a laser distance-measuring
device and there is a risk that some
external objects may occasionally
interfere with the laser beam. In
this case, the absolute positioning
will work correctly when the
external disturbance disappears.
17-78 Active Position Counter
Option: Function:
The drive has 4 individual position
counters. Only the selected counter
is updated. Allows tracking position
of up to 4 motors controlled by 1
drive, 1 motor at a time. The active
counter can be selected by this
parameter in the same setup or by
setup change when selecting
between motors.
[0] Counter 0
*
[1] Counter 1
[2] Counter 2
[3] Counter 3
3.17.6 17-8* Position Homing
Parameters for configuring the homing function. The
homing function creates a position reference in the
physical machine.
17-80 Homing Function
Option: Function:
NOTICE
This parameter is only
available with software version
48.XX.
Select the homing function. The
homing function creates a position
reference in the physical machine.
The selected homing function can
be activated with a digital input or
M0013101
Programming Guide
17-80 Homing Function
Option:
[0]
*
[1]
[2]
[3]
[4]
[9]
[10]
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Function:
a fieldbus bit. Homing is not
required when using absolute
encoders. All homing functions
except [2] Home Sync Function
require a start homing signal.
No Homing No homing function. The actual
position is 0 after power-up,
independent of the physical
machine position.
Home Position Actual position is set to the value
of parameter 17-82 Home Position,
index 0.
Home Sync Homing position is synchronized
Function with the homing sensor according
to the setting in
parameter 17-81 Home Sync
Function.
Analog Input Use the value of analog input 53 as
53 the actual position. The value is
scaled according to
parameter 3-06 Minimum Position
and parameter 3-07 Maximum
Position.
Analog Input Same as [3] Analog Input 53, but for
54 analog input 54.
Direction with Perform a search for the homing
Sensor sensor in the direction defined by
the forward/reverse signal on a
digital input or fieldbus, using the
settings in parameter 17-83 Homing
Speed and parameter 17-84 Homing
Torque Limit. When the frequency
converter detects the homing
sensor input (configured in
parameter group 5-1* Digital Inputs),
it sets the actual position to the
value of parameter 17-82 Home
Position, index 0. The frequency
converter then switches to the
positioning mode with a target
defined in parameter 17-82 Home
Position, index 0 + index 1. If
reversing is required for going to
the target position, set
parameter 4-10 Motor Speed
Direction to [2] Both directions.
Forward with Perform a search for the homing
Sensor sensor in forward direction using
the settings in
parameter 17-83 Homing Speed and
parameter 17-84 Homing Torque
Limit. When the frequency
3 3
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