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微机测控系统存在各种各样的干扰,常常影响系统正常运行。本文介绍一种简单易行的抗干扰技术能十分有效地克服干扰对系统造成的影响。所谓“应答信号”就是对微处理器所控制的各执行器件(如交流接触器、继电器、电动阀门等)通过其辅助触点引出动作信号,再把此信号线引到微处理器的I/O口(如图所示)。在微机发出控制命令后,检测该I/O
There are a variety of computer monitoring and control system interference, often affecting the normal operation of the system. This article describes a simple anti-interference technology can be very effective to overcome the interference caused by the system. The so-called “answer signal ” is the microprocessor-controlled actuators (such as AC contactor, relays, electric valves, etc.) through the auxiliary contacts leads to the action signal, and then lead the signal line to the microprocessor I / O port (as shown). After the computer issues a control command, the I / O is detected