Rockwell-automation 1771-QB Linear Pos. Bedienungsanleitung Seite 91

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Seitenansicht 90
Formatting Module Data (WRITES)
Chapter 7
712
Example: Retracting in the Positive Direction
In this example, the polarity of the axis has been reversed. The positive
direction is now towards the transducer head as indicated by the sign of the zero
position offset. Notice that the software travel limit in the positive direction can
have a negative sign.
Figure 7.11
Retracting
in the Positive Direction
Zeroposition = +5.000
Positive Limit = -5.0
Negative Limit = -20.0
Negative
Direction
Neg.
Limit
-20
Origin
0
+5
50014
Pos.
Limit
-5
Examples: ZeroPosition Left of the Transducer Head
The next two examples demonstrate configurations with the origin past the fully
retracted position.
Figure 7.12
ZeroPosition
Left of the T
ransducer Head
Zeroposition = +10.000
Positive Limit = +45.0
Negative Limit = +15.0
Positive
Direction
Pos.
Limit
+45
Origin
0
+10
50015
Neg.
Limit
+15
Zeroposition = -10.000
Positive Limit = -15.0
Negative Limit = -45.0
Negative
Direction
Neg.
Limit
-45
Origin
0
-10
50016
Pos.
Limit
-15
Seitenansicht 90
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