Technical requirements of training project: S7-300 design of an automatic washing machine control system, the specific control requirements are as follows: 1. Water level options: press the button WS1, water level selection for low, l0 lights, to press 1, level selection, MI lights, to press 1. To the water level is high, is hi lights, if press, low water, and so on. 2. The water level after selecting, press the start button st, 1 second after a water inlet electromagnetic valve V1 action, water level rise (potentiometers for use in simulated water level, with analog input module level acquisition signal) to set water level (low level 2V, water level in 4V, the high level of 6V), the water inlet valve is closed, the 2 seconds later and began washing. 3 washing time, is to turn 30 seconds, is turning washing indicator light FW, and then stopped two seconds, FW lights out and then reverse 30 seconds, reverse wash indicator RW light, and then stopped 2 seconds. 4 so loop 5 times,

PLC-xiyijikongzhixitong.doc

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