Delem
V0208, 2.15
Function
Axis speed during reference searching.
Parameter 35
RSD switch mounted
Range : 0 - 1
Unit : -
Default : 1
Remark
Only if ‘Reference Search’ (31) is set to 1.
Function
0: reference search system without Reference Search Direction switch (RSD-switch).
1: reference search system with RSD-switch
0
This reference procedure monitors the movement of the axis. When reference searching is
started, the axis is moved at the programmed speed in the programmed direction until it is
stopped by an end-of-travel (EOT) switch. Shortly after stopping, the control detects no
movement on the system and controls the axis in the reverse direction. Now the control will
accept the first reference pulse from the encoder and assume the reference position at that
point.
1
Here an RSD switch must be connected to the RSD input of the control. When reference
searching is started, the axis is moved at the programmed speed (34) in the programmed
direction (32) until the control receives a signal from the RSD switch (RSD input becomes
low). The control will stop movement and send the axis in the reverse direction. Now as soon
as the the RSD input becomes high again, the control will accept the first reference pulse from
the encoder and assume the reference position (33) at that point.
In case the RSD switch is mounted in the middle of the X-axes stroke, the control can sense
the status of this switch. In case the X-axis has not passed the RSD switch, a normal
reference search cycle is initiated. In case the X-axis has passed the RSD switch, the status
of the RSD switch indicates that reference search can start in the direction of the RSD switch
(forward). Generally you will have shorter reference search cycle time. Another advantage is
the fact that it is not needed to mount the limit switches for ref.-search.
Note:
The RSD input is designed for a switch with a normally-closed contact. Low is active, high is
not active.
Parameter 36
Retract programmable
Range : 0 - 1
Unit : -
Default : 0
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