This project will have two pumps controlled in three modes, Off – Manual-Auto
Each pump will have its own control station consisting of a lighted start push button (NO), lighted stop push button (NC), an alarm light, and a three position selector switch (off-manual-auto).
When in the off mode the pump is taken out of service will not run.
When in manual mode an operator will be able start and stop the pumps.
When in auto mode one will run while the other is in standby. The pump that is started first in automatic will make the other pump its standby, if that pump is in auto mode. Both pumps can never run at the same time
this is a project that will not be implemented in real life. The program will only used to teach students how PLC sequencing works