Siemens S5-100U User Manual page 434

Simatic s5 programmable controller

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Function Modules

Reference pulse

of the sensor

Reference pulse

of the sensor

Figure 15-19. Position of the Reference Point (SYNC Bit=1) during a Reversal of Direction

before Reaching the Reference Pulse in a Positive Direction

Transporting objects from point A to point B on a conveyor belt.

A rotary position encoder is used, together with a BERO proximity switch as reference

transmitter. The conveyor belt is marked at a definite point. As soon as this mark

comes within the range of the BERO, the BERO produces a reference signal.

Following the reference point approach, the enable input is set via a digital output module.

Enable input

Reference input

Figure 15-20. Schematic of a Reference Point Approach Operation

EWA 4NEB 812 6120-02

Positive direction of traverse

Change of direction

Operation range

Rotary position

of reference

Traversing path

Traversing range

Conveyor belt

BERO as refer-

ence transmitter

Chapters

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