This class explains how ladder diagram programming is used to program timers and counters. It examines the basic rules for each type of timer and counter used in LAD programming for S7-1200 PLCs.

When learning ladder logic, I was told that some new PLC systems were moving to scripted programming languages. My instructor assured us that we would not need to know anything other than ladder logic ...

Ladder logic uses switch or relay contacts to implement Boolean expressions. In years past, ladder logic was made possible with discrete relays and was sometimes termed “relay logic.” Today most ...