| 摘要 |
PURPOSE:To make it possible to change constants without changing the contents of a ROM, by inputting the constants required for operation into a non-volatile RAM from a keyboard. CONSTITUTION:The first operation program, which performs the operation at a tank level, and the second operation program, which performs the operation of a tank capacity, are stored in a ROM6 in a fixed mode. The constants, which are used in the first and second operation programs, are inputted to a non-volatile RAM13 through a keyboard interface part 12 by the key operation from a keyboard. The numerical values stored in the non-volatile RAM13 can be readily rewritten by the key operation from the keyboard. Since the non-volatile RAM is used, the stored contents are not erased even at the time of power OFF. |
