Pedestrian Crossing

1
Pedestrian Crossing

• This automated system has an input and an output.
• Describe where they are.

Output
WAIT
What happens when you press the button?
Input
2
Using a Loop to Monitor a Sensor
Start
Is input 1 on
3
Using a Loop to Monitor a Sensor
Start
Is input 1 on
no
4
Using a Loop to Monitor a Sensor
Start
Is input 1 on
5
Using a Loop to Monitor a Sensor
Start
Is input 1 on
no
6
Using a Loop to Monitor a Sensor
Start
Is input 1 on
7
Using a Loop to Monitor a Sensor
Start
Is input 1 on
WAIT
yes
Turn output 5 on
Delay 5
8
Complete Diagram
Start
Is input 1 on
no
WAIT
yes
Turn output 5 on
Delay 5
9
This Lesson

• In this lesson you will learn how to use decision
  table to plan what should go in the decision
  diamonds.