If anyone out there has a schematic for a fairly simple ladder logic program (ex: stop light, conveyer belt etc) I would very much appreciate the help. I am at a total loss w/the ladder logic. thanks, wendy
Ladder logic is quite simple: 1. Serial connection of contacts like -I I-I I- is an AND gate 2. Parallel connection of contacts is an OR gate 3. A normally closed contact like -I/I- means NEGATED input 4. An output (coil) is denoted as -( )- 5. The rest of the functions (timer, counter) are shown as blocks
You can download sample programs and demo software from PLC manufacturers sites.
