| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a development support device of a programmable controller (PLC) system capable of shortening time required for finding out cause of communication abnormality when the communication abnormality such as communication failure via a network occurs. <P>SOLUTION: The network including a plurality of PLCs and one development support device are included, one of the plurality of PLCs is positioned as a PLC for relay, the development support device can be connected to the PLC for relay on line, and the development support device can be connected to any target PLC on the network by changing the connection destination in an on-line connection state with the PLC for relay. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
