EXTERNAL WATCHDOG CIRCUIT FOR MICROCOMPUTER-BASED CONTROLLERS.

被引：0
|
作者：
Baldwin, J.D.C. [1 ]
机构：
[1] Louisiana State Univ, Agricultural, Cent, Baton Rouge, LA, USA, Louisiana State Univ, Agricultural Cent, Baton Rouge, LA, USA
来源：
Applied Engineering in Agriculture | 1986年 / 2卷 / 01期
关键词：
ELECTRONIC CIRCUITS - TIMING DEVICES;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An external watchdog timer circuit for microcomputer-based controllers is presented. The controller must continually retrigger the timer to keep the control system active. A relay that remains energized while the system is operating properly actuates an alarm circuit and disconnects a power source if the timer is allowed to complete its cycle. A software technique to help detect incorrect program flow is also presented.
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页码：33 / 35
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