Simurelay vs PLC Ladder Logic Simulator

Simurelay is a simulator to help you design electromechanical systems and simulate them. It allows to make many electrical diagrams by using the available basic components such as relays, switches, buttons, contactors, timers, motors...

Learn PLC ladder logic programming from scratch with PLC Ladder Learn — an animated, hands-on simulator built for engineering students, technicians, and anyone new to industrial automation. No expensive software, no real hardware needed. Open the app and start building and simulating real PLC ladder diagrams right on your iPhone or iPad. ANIMATED LESSONS Every concept is taught with moving visuals. Watch timers count up, contacts open and close, current flow through the rung, and circuits operate step by step. You learn ladder logic with your eyes — not dry text. LIVE LADDER SIMULATOR (SANDBOX) Build your own ladder diagrams and run them in real time: • Place contacts (NO/NC), coils, SET/RESET, timers and counters • Toggle inputs and watch outputs respond instantly • Series (AND), parallel (OR) and combined logic • Live signal graph (oscilloscope) to trace bits and values • Undo/redo, address suggestions and custom labels 50 REAL-WORLD PROBLEMS Solve graded automation problems from easy to hard: motor start/stop, burglar alarm, automatic door, conveyor control, mixing reactor, star-delta starter, paint booth airlock and many more. Your ladder solution is checked automatically, and selected problems show the real process animated live while your program runs. WHAT YOU'LL LEARN • Ladder logic & ladder diagram basics • Normally Open / Normally Closed contacts and output coils • Addressing (I, Q, M, DB) and the PLC scan cycle • Timers — TON, TOF, TP • Counters — CTU, CTD • Memory bits, latching, SET/RESET • Positive / negative edge detection • Comparison, MOVE and math instructions • Analog I/O — 4-20 mA, scaling, PID basics • FC / FB blocks and program structure • Industrial communication — RS-485, PROFIBUS, PROFINET, Modbus QUIZZES & PRACTICE Reinforce every lesson with quizzes and guided exercises. Earn XP and track your progress as you learn. WHO IS THIS FOR? • Engineering & vocational students (electrical, mechatronics, automation) • Technicians and maintenance staff • Career changers moving into PLC programming • Anyone learning Siemens S7 / TIA Portal concepts or preparing for an automation job WHY PLC LADDER LEARN • Learn by doing — build and simulate, don't just read • Beginner-friendly, step-by-step path • Works fully offline, anytime • English, Turkish and Portuguese supported PLC Ladder Learn is free to start. Unlock Premium once (lifetime — no subscription) for advanced lessons, all 50 problems, unlimited simulator rungs and advanced instructions, and unlimited graph channels. Download now and go from zero to confident PLC ladder logic programming. Note: This is an independent educational tool, not affiliated with or endorsed by Siemens. "S7", "PROFIBUS" and "PROFINET" are referenced for educational purposes only.