Lenze DDS v2.3 Bedienungsanleitung PDF herunterladen (Seite 26)

100

101

Drive PLC Developer Studio

Program example

3-4

DDS EN 2.3

ThestatusofthevariableSTATE is used to switch the output variables for the associated light colour:

Traffic light phase Input variable Output variables

STATE RED AMBER GREEN OFF

Green 1 FALSE FALSE TRUE FALSE

Amber 2 FALSE TRUE FALSE FALSE

Red 3 TRUE FALSE FALSE FALSE

Amber/red 4 TRUE TRUE FALSE FALSE

Off 5 FALSE FALSE FALSE TRUE

The declaration part of the function block TRAFFICLIGHT nowlooksasfollows:

3.2.5.2 Function block diagram

Now use the input variable STATE of the organization unit to determine the values of the output

variables.

9. In the lower half of the editor window for the organization unit TRAFFICLIGHT, click the field

to the left of the first network (grey field with number 1) to select the network.

10.Select Insert➞

➞➞

➞Operator.

A box with the operator AND and two inputs is inserted in the first network:

11.Click “AND” and change the text to “EQ”.

12.Select the text “???” of the upper input and enter the variable STATE .

13.Select the three bottom question marks and name the input 1.

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