Programmable logic controllers (Programmable Logical Controller, PLC for short) is a proud processor-grave Foundation general purpose control devices, also known as programmable logic controllers (ProgrammableController, abbreviated PC) or programmable machine controller (Programmable Machine Controller, referred to as PMC), Used to complete the various logic and sequential control of NC machine tools, such as machine start/stop, workpiece clamping, tool change, coolant switch auxiliary movements. PLC and machine operation panel's instruction: on one hand, direct control of machine movement; on the other hand the instructions sent to CNC, for process control. Built-in PLC in CNC system and independent. I PLC and CNC are grouped together in design, also known as the integrated, CNC is part of independent type PLC by independent professional plant production, also known as the exterior.

CNC machine tool operation is realized through man-machine operation panel, human-machine operation panel by CNC Panel and Panel.

Digital Control Panel the operation panel of CNC system, display and manual data entry (Manual DataInput, referred to as MDI) keyboard composition, also known as MD "Panel. Standing in the lower part of the display with menu choices and health, used to select the menu. Keyboard in addition to a variety of symbols and health, digital health and outside the function keys, you can also set!, such as user-defined health. Operator by the keyboard and the monitor. implement systems management on NC program and data input, storage and editing. In processing, the screen dynamic display system status and fault diagnosis. In addition, the NC programs and data to disk or a communication interface box into.

Machine operator panels are mainly used for manual mode the operation of machine tools. automatic mode for machine operation, or thousands. There are various buttons and select switch, used in machine tools and auxiliary equipment for starting and stopping, processing mode, speed ratio selection; as well as digital tube display and signal. Small and operation panel of CNC machine tools and numerical control panel into a whole, but there is a bright line between the two. CNC system communication interface, such as serial interfaces, and permanent and machine operation panel.