| 摘要 |
PURPOSE:To exactly display the operating state of each terminal equipment through a light emitter without changing a control circuit for controlling the light emission of the light emitter and to transmit an operate signal from a light receiver corresponding to the light emitter to a host computer. CONSTITUTION:At control boxes 14A-17A added to respective numerical controllers, LED 21 to be turned on while operating respective numerical controllers 14 or the like are arranged, and a phototransistor 23 and an optical fiber 24 are arranged inside a case 22 while being faced to the LED 21. Based on light emitted from this LED 21, a light receiving signal from the phototransistor 23 is transmitted through an input/output port cable 10 or the like to a personal computer and at the same time, the light emitted from the LED 21 is displayed through the optical fiber 24 to the outside of the case 22. |
