| 摘要 |
PURPOSE:To enable an owner, etc., to make a check afterward if a general person or manager performs illegal input for time alteration by checking a date and time difference recorded in a data memory each time data is inputted, and leaving the record of time alteration when the absolute value of the date and time difference is larger than a reference time. CONSTITUTION:To a bus connected to a CPU 5, a ROM 6 stored with a system program, a data memory RAM 7 stored with working data, time alteration record, etc., an internal timer 8, a timer device 9, and an interface device 10 are connected. Further, a printer 11 which prints the working data, a time alteration mark, an alteration history, etc., and a sounding device 12 which sounds attention items and notification items are connected to the interface circuit 10. In this constitution, the difference between the date and time after the internal timer 8 is altered and an absolute date and time is used as a new date and time difference and when this date and time difference exceeds the previously set reference time, the record of time alteration is left. |
