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<p><span style=";font-size:20px;font-family:黑体;color:rgb(35,31,32)"> </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">计数器用于完成计数功能,每个计数器含有线圈、接点、计时数据值寄存器,每当计数器线圈的驱动信号由 </span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">OFF </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">→ </span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">ON </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">时,计 数器读数增加 </span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">1</span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">,若计时值达到预设的时间值时,其接点动作,</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">a </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">接点(</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">NO </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">接点)闭合,</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">b </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">接点(</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">NC </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">接点)断开;若清除计时值,输出 </span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">a </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">接点即断开,</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">b </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">接点(</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">NC </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">接点)闭合。部分计数器具有掉电保持、累计等特性, </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">重新上电后仍维持掉电前的数值。 </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">计数器以 </span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">C0</span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">,</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">C1</span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">,……</span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">C255 </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">进行标识,顺序按 </span><span style=";font-size:13px;font-family:Arial;color:rgb(35,31,32)">10 </span><span style=";font-size:13px;font-family:宋体;color:rgb(35,31,32)">进制编号。 </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">一般用</span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)"> 16bit </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">保持用</span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)"> 16bit </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">一般用</span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)"> 32bit </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">保持用</span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)"> 32bit </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">保持用</span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)"> 32bit </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">C0 ~ C99 </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">100 </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">点增计数 </span><span style=";font-size:7px;font-family:Arial;color:rgb(35,31,32)">[1] </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">C100 ~ C199 </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">100 </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">点增计数 </span><span style=";font-size:7px;font-family:Arial;color:rgb(35,31,32)">[2] </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">C200 ~ C219 </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">20 </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">点双向计数 </span><span style=";font-size:7px;font-family:Arial;color:rgb(35,31,32)">[1] </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">C220~ C234 </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">15 </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">点双向计数 </span><span style=";font-size:7px;font-family:Arial;color:rgb(35,31,32)">[2] </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">C235 ~ C255 </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">21 </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">点高速计数 </span><span style=";font-size:7px;font-family:Arial;color:rgb(35,31,32)">[2] </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">• </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">[1] </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">非停电保持区域。使用参数设定,可变更成停电保持区域。 </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">• </span><span style=";font-size:12px;font-family:Arial;color:rgb(35,31,32)">[2] </span><span style=";font-size:12px;font-family:宋体;color:rgb(35,31,32)">停电保持区域。使用参数设定,可变更成非停电保持区域</span></p> |