UTPA STEM/CBI Courses/CAM/PLC Lab 01

Course Title: CAM

Lecture Topic: PLC Programming # 1

Instructor: Kevin Lee

Institution: UTPA/ MANE

Backwards Design

Course Objectives

• Primary Objectives- By the next class period students will be able to:
  • Understand ladder logic and wiring motor for CW and CCW motion.
  • Wiring a motor that opens a garage door up and down.

• Sub Objectives- The objectives will require that students be able to:
  • Understand PLC structure
  • Understand Ladder Logic
  • Identify necessary components
  • Wiring a motor that can rotate CW and CCW.

• Difficulties- Students may have difficulty:
  • Understanding PLC architecture
  • Writing a ladder logic
  • Wiring a motor

• Real-World Contexts- There are many ways that students can use this material in the real-world, such as:
  • Garage door opener
  • Radar rotating control
  • Solar cell aim to the Sun.

Model of Knowledge

• Concept Map
  • How to write a ladder logic
  • Identify flow chart
  • Identify input
  • How a motor works
  • Electric wiring

• Content Priorities
  • Enduring Understanding
    • How to program a PLC
    • Motor control
  • Important to Do and Know
    • Become familiar programming and wiring for a motor control
  • Worth Being Familiar with
    • DC Motor
    • Basic wiring skills

Assessment of Learning

• Formative Assessment
  • In Class (groups)
    • Completion of PLC program.
    • Test completed PLC program.
  • Homework (individual)
    • Examples of control systems use a motor direction control.
    • Write a complete program for garage door open and close system.
• Summative Assessment
  • Demonstrate PLC program.

Legacy Cycle

OBJECTIVE

By the next class period, students will be able to:

• Know how to program a PLC to change a DC motor rotation direction.
• Know wiring a relay and DC motor to PLC

The objectives will require that students be able to:

• Understand PLC structure
• Understand Ladder Logic
• Identify necessary components
• Wiring a motor that can rotate CW and CCW.

THE CHALLENGE

Rotate a solar cell angle to face the sun from morning to night.

Design a system that can face radar dome to an angle at an airplane that is approaching.

GENERATE IDEAS

Combine a direction control with time.

MULTIPLE PERSPECTIVES

Study control a motor with conditional statement

RESEARCH & REVISE

• Start ladder logic with turn on and off motor.
• Keep add more control so you can change rotation direction.
• Can you add automatic stop?
• Do you need emergency stop? If so can you add it?

TEST YOUR METTLE

• How many inputs and outputs were needed?
• Were you able to wire relay?
• What are the considerations for wiring?
• How can you buy parts?
• Google some suppliers who sell automation parts.

GO PUBLIC

• Make multimedia presentation and post to Web.
• Post completed program
• Show examples of application

Pre-Lesson Quiz

1. What is a PLC?
2. When do use a PLC?
3. How can you change a rotation direction of a motor?
4. What is normally open and close in a relay?
5. What is driving voltage in a relay?
6. Turn on and off a light using a PLC?

Test Your Mettle Quiz

1. Draw ladder logic to change a rotation direction of motor
2. Explain race effect
3. What is contact
4. Explain NO
5. Design an AND gate ladder logic
6. Design a latched switch

Knowledge Check

Please answer following questions. When you are finished making your selection, click the "Submit" button.

1 What is NO means in PLC input?

	Not Operational
	Normally Open
	No Use
	Not Open

2 How many outputs do you need to turn on/off and change rotation direction?

	1
	2
	3
	4

3 What was the operating voltage of relay used?

	5V
	12V
	110V
	220V

4 How many inputs do you need to make latched on/off switch with emergency stop?

	1
	2
	3
	4