Hello , i am currently in the process of trying to self learn myself basic PLC and have recieved some notes from various people to aid this. However i am stuck on this particular problem. Any help would be appreciated.
The problem is a conveyor belt system that comprises of 3 conveyor belts, each driven by a separate motor : M1, M2, M3 and must meet the following specifications
Starting:
· One pushbutton must start the motors in the sequence M3, M2, M1. This ensures that material from the previous belt is carried off before more is added
· M3 must start immediately when the start button is pushed
· After a 30 second delay M2 must start
· After another 30 second delay M3 must start
Stopping:
· One push button must stop all motors in reverse order : M3, M2, M1 to allow material to be cleared from the belts
· M1 must stop immediately when the stop button is pressed
· After a 40 second delay, M2 must stop
· After another 40 second delay M3 must stop
X0 - start button, X1 stop button
Y0 - M1, Y1 - M2, Y3 - M3
The problem is a conveyor belt system that comprises of 3 conveyor belts, each driven by a separate motor : M1, M2, M3 and must meet the following specifications
Starting:
· One pushbutton must start the motors in the sequence M3, M2, M1. This ensures that material from the previous belt is carried off before more is added
· M3 must start immediately when the start button is pushed
· After a 30 second delay M2 must start
· After another 30 second delay M3 must start
Stopping:
· One push button must stop all motors in reverse order : M3, M2, M1 to allow material to be cleared from the belts
· M1 must stop immediately when the stop button is pressed
· After a 40 second delay, M2 must stop
· After another 40 second delay M3 must stop
X0 - start button, X1 stop button
Y0 - M1, Y1 - M2, Y3 - M3