2-3
Primer: S7-300 Programmable Controller, Quick Start
C79000-G7076-C500-01
The TLIGHT sample program to be created will control vehicle and
pedestrian traffic at a pedestrian crossing, as shown in Figure 2-2.
The TLIGHT program is to control both
S The traffic lights for vehicle traffic (traffic lights) and
S The traffic lights for pedestrian traffic (pedestrian lights).
The traffic lights are equipped with the usual red, yellow, and green signals.
The pedestrian lights each have a green and red signal as well as a
pushbutton for pedestrians to request green.
Figure 2-2 The TLIGHT Sample Program is to Control Traffic at a Pedestrian Crossing as Shown
What is to be
Controlled?
What Subtasks are
to be Performed?
Defining and Structuring the Control Task
How to Define and Structure Your Control Task
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