PI E-871.1A1N, Руководство пользователя, Страница: 41 / 226

2. Stop after reaching the switch edge.
The higher the velocity on approach, the farther the axis overshoots the switch edge.
The Distance Between Limit And Hard Stop (Phys. Unit) parameter (0x63) determines the
gap between the built-in limit switch and the hard stop and therefore the maximum
braking distance during reference moves.
3. Move in the opposite direction to compensate for the overshoot.
4. Second move to the switch selected.
5. Stop on reaching the switch edge.
6. Move in the opposite direction to compensate for the overshoot.
7. Setting the current position to a defined value.
The reference point definition is finished.
The lower the velocity is when approaching the switch, the less the overshoot will be and the
higher the repeatability.
The Distance From Limit To Start Of Ref. Search (Phys. Unit) parameter (0x78) and Distance
For Reference Search (Phys. Unit) parameter (0x79) are used for reference moves when both
of the following conditions are met:
■
The reference move is started with FRF .
■
The Reference Signal Type parameter (0x70) has the value 2 or 3.
Sequence of the reference move:
1. The axis moves to the corresponding limit switch.
2. The axis moves the distance specified by the parameter 0x78 away from the limit switch.
3. The axis moves to the index pulse and travels the distance specified by the parameter
0x79 at the maximum.
Commands
F Page
FRF Fast Reference Move To Reference Switch 132
FRF? Get Referencing Result 132
H Page
HAR? Indicate Hard Stops 133
P Page
POS Set Real Position 153
R Page
RON Set Reference Mode 155
RON? Get Reference Mode 155
Parameters
0x7A Use Hard Stops For
Referencing? Should the hard stops be used for reference
moves?
0x47 Reference Travel
Direction Default direction for the reference move.
0 Automatic detection
1 Negative direction
2 Positive direction
4 PRODUCT DESCRIPTION PZ285EN
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