摘要
传统数显逻辑译码关系复杂,而用PLC的位组合元件和7段译码功能指令方法来实现LED数显.前一种方法将表示十进制数的4位BCD码的位元件成组使用,形成位组合元件数显;后一种方法用7段译码指令把指定元件的低4位对应的十六进制数译码后,驱动数显.这两种方法逻辑简单,易于理解,便于实现.
As the complexity of the traditional digital logic decoding relationship,a PLC-bit combination components method and a seven-segment decoding function instruction method are proposed to display digital LED.The first method is used to display digital bit-combination components by group using four decimal BCD code.The second method is used to drive digital display via coding hexadecimal number of corresponding four low bit of certain component using seven-segment decoding instruction.The two methods are logically simple,understandable and achievable.
出处
《昆明学院学报》
2010年第3期93-96,共4页
Journal of Kunming University
基金
昆明学院科学研究资助项目(2009C008)
关键词
PLC
位组合元件
译码指令
数显
programmable logic controller
bit combination of components
decoding instruction
digital
