Ladder rules the Logix world, because it grew up replacing relay panels for American discrete machines, but Logix Designer also speaks FBD, Structured Text and SFC. (There is no Instruction List here; Rockwell never adopted it.) Below is the same motor seal-in in all four languages, running live. Flip the inputs and watch every view light up together.
Press Start → the motor runs and seals in; press Stop → it drops. Switch tabs to see Ladder, FBD, Structured Text and SFC, and the inputs below drive all four identically.
Motor := (Start OR Motor) AND NOT Stop; // Logix ST — Pascal-like, great for math & loops
In Logix you pick a language per routine, so a ladder routine for interlocks and an ST routine for math can sit inside the same program. Most Rockwell shops live in ladder and reach for ST when the numbers get serious.
You need to average 64 analog samples in a FOR loop with array indexing. Best routine language?