SGMGH-75AC61编码器
SGMGH-75AC61编码器
产品价格:¥1(人民币)
  • 规格:SGMGH-75AC61编码器
  • 发货地:福州
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    认证类型:企业认证
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    商铺名称:福州卓凯电子科技有限公司

    联系人:林工(小姐)

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    企业邮箱:879520885@qq.com

    联系地址:福州市闽侯西江滨大道77号正荣润园一号楼1205室

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    商品详情

      SGMGH-75AC61编码器

      SGMGH-75AC61编码器

      SGMGH-75AC61编码器


      PLC运行时,CPU就要执行用户程序中的操作。但是CPU不可能同时执行多个操作,只能分时地一个操作一个操作地执行。PLC利用系统软件在其内部建立了输入输出映像区,当PLCCPU执行用户程序时,从输入映像区中读取输入信号的状态,进行相应的操作。当CPU执行完第一个操作后,将操作结果输出到输出映像区,然后再执行第二个操作,操作结果送到输出映像区。在程序执行过程中,PLC并不读取输入信号的真正状态,执行结果也并没有输出到PLC外部。只有当程序执行到结束指令(END)时,将输出映像区中执行结果向PLC外部输出一次,将输入信号的状态读取一次送到输入映像区。对输入输出信号的这一操作过程称为I/O刷新。I/O刷新完成后,CPU再从用户程序的第一条指令开始,进行下一次程序执行。PLC的这种工作方式被称为扫描方式。

       PLC的扫描周期包括上电后初始处理、共同处理、上位链接服务、外设服务、运算处理、I/O刷新。

      福州卓凯电子科技有限公司联系人:林女士
      24
      小时咨询热线:17705012279

      电话:0591-22983857

      联系QQ879520885

      传真:0591-22989937

      产品价格以电话或者QQ询价为准,发布价格不做参考


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