Programmable logic controllers, or PLCs, are used to automate processes in industry. In the 1960s, the computerized processor replaced the relay logic control system. With the widespread use of PLCs in today’s automation industry, a technician is required to have a good understanding of their operation in order to perform maintenance and troubleshooting procedures.
"List the basic components of a PLC.
Describe the basic operation of a PLC
Define the three stages of a scan cycle.
Discuss the Ladder Logic diagram of a hardwired system."
You will not be required to pass the knowledge check questions to move on to the next lesson. These will not be counted as a grade, but each question gives you insight into what you should have learned and the sorts of things you'll need to remember moving forward.
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