摘要
用逻辑电路和继电器制作的抢答器相当普遍 ,但其存在运行可靠性差 ,功能单一的缺点 .若采用可编程序控制器制作抢答器 ,不仅克服了上述缺点 ,且比前者具有更大的优越性 .即抗干扰能力强 ,运用稳定可靠 ,定时精确 ,功能扩展方便等优点 .
Generally, logical circuit and relay are used in answer－ machines. But there are many defects in this kind of answer－ machine, such as unreliability and inconvenience of functional expansion. If the programmable controller is used in answer－ machine, the defects above can be avoided, and the new machine has many advantages, such as good ability, accuracy of timing and convenience of function expansion.
出处
《淄博学院学报（自然科学与工程版）》
2000年第2期41-46,共6页
Journal of Zibo University(Natural Sciences and Engineering)
