CNC Control Systems - External Input and Output
External Inputs
This allows for interaction of the CNC with the outside world. For example to link with a PC for DNC functions such as part program downloading, remote datuming and operation so that it could be linked to integrated systems such as robots and automated guided vehicles (AGV), etc.
External Outputs
These are to send output from the CNC to outside world, for such tasks as uploading the generated or corrected programs, sending the controller information such as certain PLC register status, diagnostic information, etc.