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Simulator for Siemens S7-200 PLC. It supports boolean operations, counters, timers, rise up and fall down contacts, and mathematics operations, with integer and real numbers, like sin, cos, tan. Comments and advise are well accepted!
Qlogico is a digital circuit simulator.
True table, manipulation of boolean expresions, schematic capture and simulation, finite state machines, table of transitions, VHDL.