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Q2) a- What is the meaning of latch and unlatch in PLC? What is the purpose of the output latch? How do you use latch and unlatch? b- What is a Relay and what is its purpose in PLC? then provide an elaboration on how it works.

Q2) a- What is the meaning of latch and unlatch in PLC? What is the purpose of the output latch? How do you use latch and unlatch? b- What is a Relay and what is its purpose in PLC? then provide an elaboration on how it works.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Q2) a- What is the meaning of latch and unlatch in PLC? What is the purpose of the output latch? How do you use latch and unlatch? b- What is a Relay and what is its purpose in PLC? then provide an elaboration on how it works. Q3) Write an air-conditioner ladder program that keeps the room temperature at 25 degrees. The temperature sensor of the air conditioner produces a logic '1' when the temperature is equal to or greater than 25°C, and a logic '0' otherwise. The PLC should activate output 1 to initiate the cooling state, and output 2 to initiate the heating state. The program must maintain the air conditioner's current state for a minimum of 5 minutes.
Transcribed Image Text:Q2) a- What is the meaning of latch and unlatch in PLC? What is the purpose of the output latch? How do you use latch and unlatch? b- What is a Relay and what is its purpose in PLC? then provide an elaboration on how it works. Q3) Write an air-conditioner ladder program that keeps the room temperature at 25 degrees. The temperature sensor of the air conditioner produces a logic '1' when the temperature is equal to or greater than 25°C, and a logic '0' otherwise. The PLC should activate output 1 to initiate the cooling state, and output 2 to initiate the heating state. The program must maintain the air conditioner's current state for a minimum of 5 minutes.
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