| 摘要 |
PURPOSE:To prevent the heating device controlled with a processing microcomputer from wrong operation by a method wherein a detecting means for detecting of a malfunction in a detecting pattern is provided in the processing microcomputer, then the malfunction generated in a transmission line connected between a processing microomputer and a transmission microcomputer is continuously detected. CONSTITUTION:A transmission line is composed of a microcomputer 15 for processing control, a microcomputer 10 for signal transmission, and plural signal lines 16- 23, the microcomputer 15 controls a heating device 14, the microcomputer 10 transmits and receives transission signals having a certain format, the signal lines 16-23 connects between the microcomputer 15 and the microcomputer 10. The transmission signals are provided with a detecting means which divides said signal lines into two parts, and make the one side part ON condition, simultaneously make the other side part OFF condition, then the ON condition part is changed to OFF condition and the other part is changed to ON condition. The detecting means which detects the malfunction in said detecting pattern is provided in the microcomputer 15. Thereby, the malfunction generated in the transmission line between the microcomputers 15 and 10 can be detected continuously, and the wrong operation of the heating device can be prevented. |
