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POS-123-P-PFN
3.2 Method of operation
This control module supports simple point-to-point positioning with hydraulic drives. The system works on the
principle of stroke-dependent deceleration, i. e. the control gain (deceleration stroke) is set via parameters
D:A
and
D:B
. Alternatively the loop gain
V0:A
and
V0:B
will be used in NC mode. In this mode the velocity is
controlled and the profile ist defined by the velocity and the acceleration.
The deceleration characteristics can be set linearly (
LIN
) or approximately quadratically (
SQRT1
) via the
CTRL
parameter. For normal proportional valves
SQRT1
is the standard setting. In NC mode normally the
LIN
variation is the better fitting one.
3.2.1
Positioning sequence
The positioning procedure is controlled by the switching inputs. After the
ENABLE
signal is applied, the
required position equal to the actual position is set in the module and the drive remains stationary under
control at the current position. The general readiness for operation is now reported via the
READY
output. The
START
signal activates the transmitted position setpoint. This happens either only on the rising edge of the
START
signal or continuously if the
DIRECT
control bit is set.
The drive moves directly to the new required position and reports the reached position via the
InPos
output.
The
InPos
output remains active as long as the position is maintained and as long as the
START
signal
remains applied.
In manual mode (
START
disabled) the drive can be moved by means of
HAND+
or
HAND-
. The drive moves
under open-loop control at the programmed manual speeds.
When the
HAND (+
or
-)
signal is switched off, the current actual position is accepted as the required position
and the drive comes to a controlled stop.
The HAND mode can be used-in case of a sensor failure-to drive the axis manually.
V+
V+
A:A
D:A
A:B
D:B
MAX:A
MAX:B
driving out
volumetric flow
P-A
and B-T
control direction
control direction
driving in
Содержание POS-123-P-PFN
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