| 摘要 |
PROBLEM TO BE SOLVED: To notify that a sub-control section is illegally replaced.SOLUTION: A one-chip CPU 291 of a 24h door monitoring unit 290 performs sub-control board collation processing. In the sub-control board collation processing, the one-chip CPU 291 stores collation result information including a determination result that a collation code received from a sub-control board 42 is not matched with a collation code stored in a flash memory 292, in the flash memory 292. Furthermore, when receiving a monitoring history request being a command which requests transmission of monitoring history information including collation result information from a sub-control board 42, the one-chip CPU 291 performs monitoring history information transmission processing which transmits the monitoring history information including the collation result information stored in the flash memory 292 to the sub-control board 42. The sub-control board 42 creates a monitoring history screen shown in Figure 11 on the basis of the received monitoring history information to display it on a display screen of a liquid crystal display device 11. |
