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What is ladder logic?


Ladder logic is a control logic programming language originally based upon real-world industrial control circuits that included components such as push buttons, limit switches, control relays, timers and counters. The GUI (graphic user interface) resembles an electrician’s wiring diagram with the user inserting the various logic-equivalent function elements into a series of pages, or networks. See the diagram below for an example of the TelePACE GUI.