Every time you read about a "drum switch" or "primary resistor starter," Google the "VFD parameter" that replaces it. This will prepare you for the journeyman exam where they ask, "How do you reverse a motor with a PLC?" (Answer: Swap two output leads or change a bit in the logic, not a physical drum switch).
For those using the 5th edition of "Electrical Motor Controls for Integrated Systems," there are several resources available to help fix common issues. These resources include: Every time you read about a "drum switch"
: Control logic and PLCs are integrated throughout the curriculum, reflecting their role as the "brain" of modern automated systems. Core Components and Circuitry Every time you read about a "drum switch"
