TWI727090B

An object of the present invention is to transmit and receive device information among a plurality of devices without causing information leakage. A processing apparatus for processing a workpiece comprises a chuck table for holding a workpiece, a processing means for processing the workpiece held on the chuck table, a control means for controlling the chuck table and the processing mechanism, an input means for inputting processing conditions to the control means, a storage section for storing the processing conditions inputted to the input means, an LED display light emitting visible light to report operation status such that the device information is transmitted and received by means of visible light to/from other processing apparatuses.