Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 11, Problem 12P
Program Plan Intro
Count-Up (CTU) Counter:
- The CTU counter refers to an up counter
- This counter is used to count an event that occurs logically or externally and places that value in the counter’s accumulator.
- The accumulated value can even be maintained during false rung conditions and can be reset back to 0 using reset instruction.
Math functions:
The basic math functions performed by PLCs are as follows:
- Addition
- This function is used to add one piece of data to another.
- It is also called as ADD.
- Multiplication
- This function is used to multiply one piece of data by another.
- It is also called as MUL.
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6. Develop a program as below conditions with any PLC languages.
Input 1: Cylinder 1 reed switch extend signal
Input 2: Cylinder 1 reed switch retract signal
Input 3: Push Button
Output 1: Cylinder 1 solenoid valve
• Output 2: Lamp Indicator (Green)
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Step 1: Push button pressed and released
Step 2: System start count down 5 seconds and lamp indicator start blinking with
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Step 3: After 5seconds, lamp indicator stop blinking and turn to always ON.
Step 4: Trigger cylinder extend and check extend sensor on for 1 second
Step 5: Trigger cylinder retract and check retract sensor on for 1 second
Step 6: Counter +1
Step 7: Repeat step 4 to step 6 until counter equal or more than 5.
Q1-a : Using ST PLC programming language. Write program segment that return
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10
Chapter 11 Solutions
Programmable Logic Controllers
Ch. 11 - Explain the function of math instructions as...Ch. 11 - Prob. 2RQCh. 11 - What standard format is used for PLC math...Ch. 11 - Prob. 4RQCh. 11 - Prob. 5RQCh. 11 - Prob. 6RQCh. 11 - Prob. 7RQCh. 11 - Prob. 8RQCh. 11 - Prob. 9RQCh. 11 - Prob. 10RQ
Ch. 11 - With reference to the instruction of Figure 11-34,...Ch. 11 - With reference to the instruction of Figure 11-35,...Ch. 11 - Prob. 1PCh. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - With reference to math instruction program shown...Ch. 11 - With reference to the math instruction program...Ch. 11 - Prob. 11PCh. 11 - Prob. 12P
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