Programmable Logic Controllers - With Access
5th Edition
ISBN: 9781259933523
Author: Petruzella
Publisher: MCG
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Chapter 11, Problem 8P
Program Plan Intro
a.
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.
Addition math function:
- Math instructions refer to all output instructions that uses the data of two words or registers and perform the desired function.
- Addition function is used to add one piece of data to another.
- It is also called as ADD.
Program Plan Intro
b.
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.
Addition math function:
- Math instructions refer to all output instructions that uses the data of two words or registers and perform the desired function.
- Addition function is used to add one piece of data to another.
- It is also called as ADD.
Timer ON Delay (TON):
- TON refers to an on-delay timer.
- The on-delay timer is the most commonly used timer.
- TON counts the time-based intervals as soon as the instruction becomes true.
- Here, the output changes its state from low to high when the timer provides some time delay (instruction goes from OFF to ON state).
MOV instruction:
- Move (MOV) instruction is used to copy the data of the source register into destination register.
- Here, the contents of the source register will not be altered.
- In other words, it is used to copy the value in one word or register to another word or register.
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ROBLEM:
Control 2 double acting cylinders using one push button for start and one push button for stop. The
repetitive cycle is as follows: Extend C1, after 5 seconds extend C2, after 5 seconds retract C1, after 5
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I – Conduct the experiment with Codesys PLC module or online PLC simulator.
()
II- Simulate the process with I/O, and evaluate the outputs. ()
III- Make suitable connections for the pneumatic circuit and PLC, run the simulation and get the
output verified.
IV-Interpret the output of the PLC program with respect to its function.
Write a PIC assembly program that toggles a LED connected to RC0 every second. In addition to this, a buzzer connected to RB5 sounds for one second every five seconds. Write the delay routine using any method you want. Use an oscillator frequency of 4 MHz.
It will be drawn in the form of a PLC diagram and a solution will be reached.
Chapter 11 Solutions
Programmable Logic Controllers - With Access
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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