| 摘要 |
PURPOSE:To prevent other control devices or a common control device from the influence of the power supply operation of one elevator control device by forming a terminal for inputting a program execution suspending instruction in a CPU. CONSTITUTION:A power supply detecting signal 12 outputted from a power supply voltage detecting circuit 6 for checking the voltage of a power supply 5 is inputted to an inversion circuit 21. The output of the inversion circuit 21 is turned on when the power supply 5 is turned off, and inputted to a holding terminal 20 of the CPU 1. When the power supply detecting signal 12 is inputted to the terminal 20, the CPU 1 is stopped extremely quickly at the same time as the turning-off of the power supply to suspend the execution of the program. Namely, the program is suspended before a fixed period from the inhibition of use of a data memory 3. After the detecting signal 12 is delayed for a fixed period by a delay circuit 13 and the delayed signal is inputted to a reset terminal 15 of the CPU 1 through an inversion circuit 14. On the basis of the input, the CPU 1 suspends the whole operation to stop the operation completely. |
