| 摘要 |
<p>Numerical control devices (1a to 1c) are provided with PC card interfaces (4a to 4c), respectively. A modem card (2) connected to a radiotelephone (3) is loaded into the PC card interface of one of the numerical control devices, and communication between this numerical control device and a remote computer (21) is effected. Thus, the computer (21) is used for the maintenance and management of the numerical control devices, management in case of abnormality, control software updating, and program loading. <IMAGE></p> |
