| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology for detecting instantaneous interruption of a network between a computer and a PLC. <P>SOLUTION: A connection state confirmation function executes: a process of determining the presence or absence of a connection between a computer and a PLC at a predetermined time interval; a process of comparing a current connection ID with a connection ID stored in a memory when the connection is present; a process of determining that an interruption of the connection has occurred between a previous monitoring process and a current monitoring process when the current connection ID does not coincide with the connection ID stored in the memory; and a process of storing the current connection ID in the memory. <P>COPYRIGHT: (C)2013,JPO&INPIT |
