| 摘要 |
PROBLEM TO BE SOLVED: To automatically restore display contents even when an LCD is erroneously displayed, or an LCD controller becomes a data reception impossible state by providing a timer and a control program means. SOLUTION: First of all, the contents (data B) displayed on the LCD 83 on an operation panel 87 are written in a work memory 93 of a microcomputer 91 from the LCD controller 84. Then, the data A preserved in a main memory 92 are compared with the data B in the memory 93, and when they agree, the data A in the memory 92 are displayed on the LCD 83, and refreshing operation is ended. On the other hand, when they disagree as the comparison result between the data A and B, a command of initialization is issued to the LCD controller 84, and then, the data A preserved in the memory 92 are displayed on the LCD 83, and refreshing processing is ended. In such a manner, the display of the LCD is warranted by executing a prescribed program at every a fixed time by an interval timer 95. |
