What is PLC question and answer?
Answer: PLC is the short abbreviation of the Programmable Logic Control. PLC is a solid-state control device or computerized industrial controller that performs discrete or sequential logic in the automation industry. PLC is a combination of software and hardware.
What is a PLC interview?
Introduction to PLC Interview Questions and Answers. PLCs, take all tasks related to monitoring and control actions care. The main job of PLC is to sense input through modules, process the logic through CPU, and memory should be providing a necessary output through output modules.
What is the basic of PLC?
The basic elements of a PLC include input modules or points, a Central Processing Unit (CPU), output modules or points, and a programming device. The type of input modules or points used by a PLC depend upon the types of input devices used.
What are the types of PLC?
The two main types of PLC are fixed / compact PLC and modular PLC.
What is the father of PLC?
Morley
Richard “Dick” Morley, an electrical engineer named the “father” of the programmable logic controller (PLC) passed away on Oct. 17 in New Hampshire at the age of 84. Morley was the founder and president of Bedford Associates, where he created Modicon, the first PLC, in 1968.
What is PLC Scada?
A PLC is a piece of physical hardware. SCADA, on the other hand, is software. To this end, a PLC is physical. This software is designed to control the entirety of the system, collecting data from all inputs and monitoring all devices. A PLC, by contrast, focuses on one element of the system.
What is the PLC cycle?
The scan cycle is the cycle in which the PLC gathers the inputs, runs your PLC program, and then updates the outputs. This will take some amount of time often measured in milliseconds (ms). The amount of time it takes for the PLC to make one scan cycle is called the scan time of the PLC.
What is PLC block diagram?
Block diagram of PLC. PLC contains mainly three unit CPU, INPUT and OUTPUT. CPU:-CPU contains a processor. CPU read and executes programming instruction which is programmed by programmer. CPU controls all activity by receiving input, and as per program control all output.
What kind of job can you get with a PLC?
PLCs, take all tasks related to monitoring and control actions care. The main job of PLC is to sense input through modules, process the logic through CPU, and memory should be providing a necessary output through output modules. Now, if you are looking for a job related to PLC, you need to prepare for the 2021 PLC Interview Questions.
Which is the most important instruction in plc?
Answer: Timer is the most essential instruction for PLC. The timer is used to operate and control devices for a specific duration of time. The programmer can set the timer based on the project requirement. Question 12. What are the different types of PLC timers?
What makes a PLC a programmable logic controller?
Programmable logic controllers, also called programmable controllers or PLCs, are solid-state members of the computer family, using integrated circuits instead of electromechanical devices to implement control functions.
What is the scan time of a PLC?
Scan time is basically the total time needed to read the input, process the logic of the program and update the corresponding output in a single cycle. Generally, the time for SCAN is of the order milliseconds and it is a continuously running process. 8) List the advantages of PLC over Relays? The advantages of PLC over Relays are: Small size.