| 摘要 |
<p>PROBLEM TO BE SOLVED: To resolve the problem that it is not easy for a user to examine detailed information of a communication error between a programmable controller which controls each device and a control means which gives a command to the programmable controller, because this examination needs deep knowledge about a communication packet. SOLUTION: A communication monitor means is provided between the programmable controller and the control means to automatically take in and analyze the communication packet, and the result is stored in a table so that the part where error occurs can be discriminated.</p> |
