| 摘要 |
PROBLEM TO BE SOLVED: To provide a simplified illegal network access preventing system for preventing the invasion of a third person by automatic log-out even when a maintenance operator leaves operation in a log-in state. SOLUTION: An input device 1 outputs an input event 5. A network managing device 2 is operated under program control and connected with a network managing device 2 of a station/device 3. A control processing detecting part 21 holds a timer counter and reports a log-out instruction signal 7 to a log-out processing part 23. A command transmitting/receiving processing part 22 outputs a command processing notice 6 and performs processing of command transmitting/receiving data 8. The log-out processing part 23 receives the log-out instruction signal 7 and reports a log-out instruction signal 9. When the maintenance operator logs in, a picture display part 24 displays a control menu and when the operator logs out, the control menu is not displayed. |
