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The superimposed distance is defined by
, and the velocity by
. The
acceleration, deceleration and jerk rates are defined by
and
respectively.
The status of the command is visible in bit 1 of
.
■
Phasing relative
This command shifts the actual master position by a given distance in a profiled
way. The source of the command is selected by
The relative phasing distance is defined by
, and the velocity by
. The
acceleration, deceleration and jerk rates are defined by
,
and
respectively.
The status of the command is visible in bit 3 of
.
■
Latching
Latching enables position monitoring or correction based on external events such
as proximity switches. The control program supports two configurable latching
sources which are activated by
and
, or bits 5 and 6 of
. Latch
activation status is shown by
. is configured by
and
. The latching
parameters are active only when homing is not active as homing has higher priority.
For more information on latching, see section
■
Virtual master
As an alternative to an external encoder, a virtual master can be selected by
parameter
. Once selected, the virtual master can be operated using
,
and
The virtual master is configured by parameters
,
,
and
The actual values of the virtual master are shown in
and
.
Settings and diagnostics
Parameter groups:
20 Start/stop/direction (page 241)
75 Position profile (page 450)
,
86.2 Actual position (page 463)
and
.
Actual position
Actual position is provided by the position feedback device selected by
. The
source can be mounted on the motor shaft or on the load side. In addition, speed
feedback – typically received from the motor – is also used for the control.
ACS880 drives can have two different feedback devices for speed and position,
and various combinations are supported. See section
as well as FEN-xx interface module documentation for details.
38 Position control program features
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