How To Define And Structure Your Control Task - Siemens SIMATIC S7-300 Quick Start Manual

How to Define and Structure Your Control Task

What is to be The TLIGHT sample program to be created will control vehicle and
Controlled? pedestrian traffic at a pedestrian crossing, as shown in Figure 2-2.
What Subtasks are The TLIGHT program is to control both
to be Performed?
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
Primer: S7-300 Programmable Controller, Quick Start
C79000-G7076-C500-01
The traffic lights for vehicle traffic (traffic lights) and
The traffic lights for pedestrian traffic (pedestrian lights).
Defining and Structuring the Control Task
2-3