Package: Programmable Logic Controllers with Activities Manual
5th Edition
ISBN: 9781259717550
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 7, Problem 3RQ
Program Plan Intro
Programmable Logic Controller (PLC):
- Programmable Logic Controller (PLC) is a specialized computer used in industrial segments to control machines and process.
- PLC is program that consists of a set of instructions which resembles the controlling functions needed to perform specific tasks.
- The function of PLC is similar to that of a relay and hence, in an industrial segment a relay is greatly replaced by a suitable PLC.
- When compared to general Personal Computer (PC), a PLC is available in small and tiny sizes.
- The basic architecture of a PLC consists of an input-output interface module and a small Central Processing Unit (CPU) that runs by control
programming language.
Timer:
- A timer refers to an instruction which waits for an amount of time before performing something.
- A timer counts fractions of seconds or seconds using the internal CPU clock.
- There are mainly three types of PLC timer delays, such as ON-delay timer, OFF-delay timer, and retentive timer ON.
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Chapter 7 Solutions
Package: Programmable Logic Controllers with Activities Manual
Ch. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - Prob. 3RQCh. 7 - Prob. 4RQCh. 7 - a. What are the two methods commonly used to...Ch. 7 - Prob. 6RQCh. 7 - Prob. 7RQCh. 7 - Prob. 8RQCh. 7 - For a TOF timer: a. When is the enable bit of a...Ch. 7 - Explain what each of the following quantities...
Ch. 7 - State the method used to reset the accumulated...Ch. 7 - Study the ladder logic program in Figure 7-40 and...Ch. 7 - Study the ladder logic program in Figure 7-42, and...Ch. 7 - Prob. 6PCh. 7 - Prob. 7PCh. 7 - Prob. 8PCh. 7 - Prob. 9PCh. 7 - Prob. 10PCh. 7 - Prob. 11PCh. 7 - Prob. 13PCh. 7 - When the lights are turned off in a building, an...
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- How does Clock Prescaling work in microcontroller timer modules?arrow_forwardWrite a PLC ladder logic program that will provide a low voltage start to an electric motor.arrow_forwardDraw a plc ladder diagram for blinking lights with start and stop button. Please help me with this. Thank you in advanced.arrow_forward
- 1. Create a Ladder logic using below instruction -Function: A start, and a stop button is used for starting and stopping a motor. But makesure that the buttons can only start and stop the motor on a positive or rising edge.2. Briefly explain how the traffic light are working using PLC Program for Traffic LightControl. Include a diagram to your explanation.arrow_forwardThe three values the sequence counter (SC) cycle through the FETCH portion of the RSC instruction cycle are: __________________.arrow_forward28. The anded output of the bits of the interrupt register and the mask register are set as input of: a. Priority decoder b. Priority encoder c. Process id encoder d. Multiplexerarrow_forward
- What types of operands may be used with the FADD instruction?arrow_forwardWalk me through the fetch-decode-execute cycle's phases. Your explanation must include a comprehensive description of what is occurring in each register.arrow_forwardExplain the difference between the asynchronous counter and the synchronous counter.arrow_forward
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