Proximity detection :                                                   

The linear potentiometer symbolises a laser linear position sensor      

In this example, the measured value (IW4) is transferred to an analog word (Qw6) (cf. operation on words)

How to configure a linear potentiometer :

This window allows to :

• choose the orientation of the photoelectric sensor to place ;

• define the range of the detection ;

• edit the acquisition card.

Editing the acquisition card :

 As the configuration page shows, these input objects always behave in the following manner :

  From measurement to the electrical value and to the automaton acquisition

The user must set the values :

• the physical limits of the measurement or of the set point value (e.g. from 5 cm to 300 cm , from 0 % to 100 % for a set point value) ;

• the standard type of acquisition card (from 0V to 10 V, From -10V to +10 V, from 4mA to 20mA) ;

• the behaviour of the sensor: linear or non linear ;

• the limits of the acquisition card of the automaton (limits of the word processed by the automaton) ;

• the fields of mnemonic and of description are not absolutely required.

An info-bubble shown in the RUN mode gives the following information separated by a comma :

1. physical quantity ;

2. electrical value ;

3. automaton data value.

    See also :  Analog inputs