Programmable controller
专利汇可以提供Programmable controller专利检索，专利查询，专利分析的服务。并且PURPOSE:To avoid the overall discontinuation of the working of a programmable controller due to an effect of temporary noises, etc. and to continue a control action, by providing a monitor means to decide whether the one-circulation time of execution of a user program is within a prescribed time. CONSTITUTION:A monitor means decides for each execution whether the one- circulation time of execution of a user program is within a presribed time. For instance, the reference time for execution of program is supplied to a watchdog timer 8 by a microprocessor CPU1, and at the same time a signal LD is transmitted for presetting. Then the clock signal given from a pulse generating circuit 9 performs down-counting. When the time is up, a signal TU is delivered to set a flip-flop 10. When the one-circulation time of the user program is over within the reference time, the reference time is preset to the timer 8 for both an input/ output replacing means and a data saving means by the CPU1 prior to the actuation of both means. Then a program is carried out.，下面是Programmable controller专利的具体信息内容。
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