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MAS1 1 3 Dig it al Con t rol, Sem est er 1 , 2 0 0 9 . Pag e: 1 1Pedestrian Crossing: State-Machine1. Obtain the states2. Draw the state transition diagram3. Derive state equations and transientequations4. Convert to ladder logic ST3Transients: T1,T2,T3,T4,T5e.g. T1: transient from ST1 to ST2ST2Delay 4 sT2System State:L1,L2, .., L6State description:ST1,ST2,ST3,ST4and First Scan: FST1S1 pressedST1FST5S2 PressedT3ST4T4Delay 4 s
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