RUNG 0002įirst floor PB is pushed to turn on the latch coil to store the output of status when the First limit switch is off. Starting the Operation using start latch, Ground floor PB is pushed to turn on the latch coil to store the output of status when the ground limit switch is off. Latching rung to operate the system through Master Start and Stop PB. Inputs and Outputs Elevator PLC Program PLC Program Description RUNG 000 ![]() Write the PLC ladder logic for the above-example. Limit switches are used to locate and stop the lift on each floor.One is inside the lift and the other is outside the lift. ![]() In the picture given, there are totally two floors.
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