FED Find Edge
Used in: Digital Input Signals (80), Motion in closed-loop operation (32)
Description:
Moves an axis to a specified signal edge.
Long description
FED does not set a specific position value at the selected edge (in
contrast to FNL, FPL, and
); i.e., the axis is not refer-
enced after using FED.
Servo mode must be switched on for the specified axis (axes)
(closed-loop operation). HID control may not be activated for the
corresponding axis.
If multiple axes are specified in the command, they are moved syn-
chronously.
The following settings influence what type of motion is possible
with FED:
■
Is there a reference point switch (parameter
■
Are there limit switches (parameter
■
If the reference point switch outputs an index pulse: How is the
move to the index pulse to be done (parameters
,
)?
You can use the digital input lines instead of the switches as source
of the switch signals for FED.
FED can be used to measure the physical travel range of a new me-
chanics and therefore determine the values for the corresponding
parameters:
■
Distance from the negative to the positive limit switch
■
Gap between the negative limit switch and the reference point
switch (parameter ID
)
■
Gap between the reference point switch and the positive limit
switch (parameter ID
).
Format:
FED{␣<AxisID>␣<EdgeID>␣<Param>}
Arguments:
<AxisID>
Axis ID
<EdgeID>
Edge type, which the axis is to move to
<Param>
Depends on the selected edge and determines it
more precisely
If multiple axes are specified in the command, they are moved syn-
chronously.
Troubleshooting:
Illegal axis identifier
Limit and/or reference point switch deactivated
Servo mode not active (
responds with the value "0")
9 COMMAND REFERENCE
PZ285EN
‒
1/30/2019
131
M O T I O N | P O S I T I O N I N G