If you want to get an idea of the PLC programming functions etc, some of the manufacturers have their manuals in PDF on their web site. Mitsubishi is one (meau automation) pick a series such as the FX-F series and this will give you an idea as to the instructions etc. Also ebay is a good place to pick up a small PLC for practicing purposes. If you can get a PLC with a copy of the PC software that is a bonus as some companies charge an arm and a leg for their s/w.
Al
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.