Lenze DDS v2.3 - Manual (Page 23)

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Program example
3-1
l
DDS EN 2.3
3 Program example “Traffic light”
3.1 Introduction
This chapter includes a program tutorial for an easier start with the DDS.
The setup calls for the programming of a mini traffic control system for two traffic lights at an
intersection.
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Both traffic lights will alternate their red/green phases.
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To avoid accidents, the traffic lights will also include amber and amber/red between the red
and green phases, with the amber/red phase being shorter than the amber phase.
This example illustrates
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how to implement time-controlled programs using IEC 61131-3 language tools.
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how to edit the various standard languages using the DDS.
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how to link the different languages.
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how to simulate a program in the DDS and visualize it on screen.
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