Lesson 2: Ladder Logic, Timers, Counters, Sequences, and Analog Basics
Lesson Overview
This lesson develops practical skills in ladder logic, timers, counters, sequences, and analog basics for the Programmable Logic Controller Essentials Training course, with implementation, verification, documentation, and troubleshooting guidance.
Topics Covered
Contacts, coils, branches, latches, edge detection, permissives, and interlocks
Timers, counters, compare, move, arithmetic, conversions, and simple reusable logic
Modes, state sequences, starts, stops, resets, alarms, and fault-recovery behavior
Analog ranges, scaling, normalization, filtering, limits, engineering units, and calibration
Watch tables, online tests, simulation, logic debugging, and documented test cases
Practical Activity
Create or review a practical configuration for contacts, coils, branches, latches, edge detection, permissives, and interlocks.
Build and test an exercise involving timers, counters, compare, move, arithmetic, conversions, and simple reusable logic and modes, state sequences, starts, stops, resets, alarms, and fault-recovery behavior.
Use diagnostics or evidence to validate watch tables, online tests, simulation, logic debugging, and documented test cases.
Key Takeaways
Explain contacts, coils, branches, latches, edge detection, permissives, and interlocks.
Apply timers, counters, compare, move, arithmetic, conversions, and simple reusable logic and modes, state sequences, starts, stops, resets, alarms, and fault-recovery behavior.
Validate and troubleshoot watch tables, online tests, simulation, logic debugging, and documented test cases.
