What Is PLC Programming?

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PLC is an acronym for Programmable Logic Controller. The PLC takes the input, checks the condition and, based on the condition, switches its output on or off.

Use

  • PLC is used in most of the industries where electrical control is required to perform certain industrial tasks, such as packaging, automated assembly and material handling.

History

  • PLC was pioneered in the late 1960s, primarily to get rid of relay-based machines or mechanical devices.

Design

  • PLC is made up of a Central Processing Unit (or CPU), memory and input/output circuits. Furthermore, PLC contains counters, timers, relays and memory locations.

Insight

  • Relays acquire or transmit signals from switches and sensors. Counters are used for counting electrical pulses.

Functionality

  • There are three functional steps in the PLC: checking input status, executing a program and updating output status.

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