Discrete State Process Control.
Discrete State Process Control
Open a new file and create a ladder program to control a washing machine. This washing machine would have a fill cycle to one level, a 10 second wash cycle, a 10 second rinse cycle and then drain. Include a start button, low level switch, high level switch, an agitator motor, a fill valve and a drain valve. Save this file as washingmachine(yourname).
A control system is needed to control a small shopping center parking lot lighting system and the exterior lighting for the building. The design specifications require that the parking lot lighting and the exterior lighting turn on at dusk automatically. The parking lot lighting should automatically turn off at midnight but the building exterior lighting should remain on until dawn when it is turned off automatically. The system should repeat daily and should not require adjustment for the change in the seasons. Locate and specify an appropriate sensor if it is to operate at 120 vac as an input to a PLC. Create the ladder diagram program to accomplish the specified control. Paste the sensor specifications into a word document and save as SensorSpec(yourname). Save the ladder file as lightingcontrol(yourname).
Refer to problem 7.4 in the text. Determine a solution. Prove your solution by simulation. Create a title block with a title and your