From the course: PLC Sequencer Logic

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Car wash truth table

Car wash truth table - Ladder Logic Tutorial

From the course: PLC Sequencer Logic

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Car wash truth table

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- [Instructor] This is the truth table for the process we have. Step one, water valve is on. Step two, both water and soap are on. Step three, only water is on. Step four, only hot wax valve is on. Step five, only air blower motor is on. And step six, all are off and the car exits. And everything else is zeros. And this is the truth table for our current process. Now for the connection. This is the way I connected the output signals for the car wash outputs. Air blower motor output is connected to output two bit zero. Hot wax valve is connected to output two bit one. Then soap and water valves. The reason I connected them this way, so that it matches the bits pattern that comes from the sequencer file. The instruction executes bit zero first, then one, two, until bit 15. If you chose a different way to connect the outputs, that is fine. Just keep in mind that the truth table for different outputs arrangement is…

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