Automated filling, capping, and wrapping system using PLC
The following diagram shows another industrial application of PLC:
Figure 9.51 – Filling, capping, and wrapping
The start push button (normally open) is connected to I0.0, while the stop push button (normally closed) is connected to I0.1. A conveyor motor is connected to Q0.0, a fill valve is connected to Q0.1, a capping machine is connected to Q0.2, and a wrapping machine is connected to Q0.3. A fill position sensor is connected to I0.2 and a cap position sensor is connected to I0.3, while a job out sensor is connected to I0.4, as indicated in the preceding diagram.
When the start push button is pressed and released, the conveyor motor should start running until the bottle gets to the fill position sensor; in other words, the fill position sensor detects the bottle and the conveyor motor stops.
The fill valve should open as soon as the conveyor motor stops at the fill sensor for 10...