From the course: PLC Sequencer Logic

Intro to sequencer instructions - Ladder Logic Tutorial

From the course: PLC Sequencer Logic

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Intro to sequencer instructions

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- [Instructor] In most manufacturing and industrial settings the process is usually programmed to perform the same output pattern for a period of time. The sequencer instructions control a pre-determined sequence of events. They are instructions that control several outputs with multiple step patterns. So, they're often used to control machines that have a stepped sequence of repeatable operations. Sequencer instructions simplify the letter program by allowing you to use a single instruction or pair of instructions to perform complex operations. The generic sequencer instruction is usually a block type and has the following. The number of steps, file that has a starting register, destination register, step pointer for the current step, and how to control the sequence. The sequencer instructions are available on most PLCs. Even though the basic operating principle of the sequencer is the same regardless of the manufacturer. Each manufacturer, will have its own specific programming procedures for the sequencer instructions.

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