| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an indicator system in which data is downloaded or uploaded to/from an optional slave indicator by connecting a computer to a master indicator when an indicator group is constituted of one master indicator and a plurality of slave indicators. <P>SOLUTION: The plurality of slave indicators (a)-(d) are connected to the master indicator A through a communication bus 1. In a normal operation mode, PLC information is transmitted/received between a PLC and each indicator. When each slave indicator is switched to a system mode in accordance with a request from a personal computer, a program is downloaded or uploaded between the personal computer and an optional slave indicator through the master indicator A. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
