| 摘要 |
PURPOSE:To continue the control with a simple circuit, by providing a circuit which holds memory momentarily for volatile memory elements, executing the program from the start of the control block when the control circuit has a power supply short break detecting signal in the memory elements at the restoration of power supply, and executing it from the start of the control sequence, if not present. CONSTITUTION:The central processing section 1 executes the initial set 1 the same as the start of conventional power supply application, if the signal pattern for the power supply short break detection in a volatile memory 5, to start the waiting process. Next, when the central processing section 1 reaches the block 1 during communication, the signal pattern for the power supply short break detection preset in the memory 5 is written at 6 to transfer the information of minimum amount through ROM3 and RAM4. If the power supply is momentarily interrupted, the power supply is reset 2, and the section 1 executes the block during communication again when the memory 5 has the signal pattern for short break detection. When the block passes over, the memory is erased. Thus, the control sequence can be continued at the power supply short break with a simple short break detecting circuit. |
