PLC & CNC Logic Writing

CNC programming software creates program codes and instructions used to run a machine tool controlled by a computer. Each unique part requires its own CNC program. Modern CNC machines are much more advanced than their predecessors and have full-fledged PCs which permit all kinds of interaction with the user. they can be networked through ethernet, RS232, accept Compact flash cards, USB drives etc.

PLC

PLC (Programmable Logic Controller) is a ruggedized industrial computer. PLC has a series of inputs and outputs which can be as few as 4 to 8 to maybe a hundred or more through addon Input-Output (IO) modules. The inputs receive signals from sensors and outputs activate motors, valves, signals, through relays and switches. The PLC works on a sequential scan cycle.

CNC machines also have a PLC to control all the peripherals, interlocks and signals. For eg., a PLC may prevent a chuck from being clamping on a CNC turning machine when it is in operation. PLCs are good enough for many kinds of automation without requiring NC or CNC