Rockwell-automation 1771-QB Linear Pos. Manual do Utilizador descarregar pdf (Página 91)

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

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

+10

50015

Neg.

Limit

+15

Zeroposition = -10.000

Positive Limit = -15.0

Negative Limit = -45.0

Negative

Direction

Neg.

Limit

-45

Origin

-10

50016

Pos.

Limit

-15

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