1756-CFM

来源:厦门阿米控技术有限公司
发布时间:2018-09-26 08:50:00

走出烂泥的污沼,清除心中的魔障,集一泓清甘的天露。拈花问莲,柔指曲潺,静心入玄,情怡彩墨,魂归灵境。俗世的纷扰渐归烟尘,心中的灵愿正在归真,静禅灵魂的升华和腾飞。

☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆






我不知道,你是否知道我的存在。


但我知道,我知道你的存在。


而且知道,你一直在寻找着我。


可我却没办法告诉你:我在这里。


只能祈祷上天让你感应到我的心跳,


让你回眸看看我清晰的脸庞。


我幻想着那一刻,


你一定倍感激动,而我已满脸泪痕。


等待,是个漫长的过程。


而我终于等到了你的回眸。


好想对你说,你知道我在等你吗?


等待着你需要我,等待着你找到我,


等待着,一直等待着。。。。。。


等待着你的 厦门仲鑫达自动化








☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆


  小鸡问母鸡 :“马上元旦了,可否不用下蛋,带我出去玩啊”?母鸡道:“不行的,我要工作”!小鸡说:“可你已经下了许多蛋了!”母鸡意味深长的对小鸡说:“一个蛋,菜刀靠边站,半年不生蛋,高压锅里见。”孩子你要记住:存在,是因为你创造价值!淘汰是因为你价值丧失。过去的价值不代表未来的地位,所以每天都要努力!生命不息,奋斗不止。奋斗止了,生命就没了!












  









☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

       当PLC的输入端输入信号发生变化PLC输出端对该输入变化做出反应需要一段时间,这种现象称为PLC输入/输出响应滞后。 

      由上述分析可知,扫描周期的长短主要取决于程序的长短。扫描周期越长,响应速度越慢。由于每一个扫描周期只进行一次I/O刷新,即每一个扫描周期PLC只对输人、输出状态寄存器更新一次,故使系统存在输人、输出滞后现象,这在一定程度上降低了系统的响应速度。工业现场的干扰常常是脉冲式的、短时的,PLC的输入/输出响应滞后,对一般的工业控制要求,是完全允许的,还可以起到增强系统的抗干扰能力。

      但是,对于控制时间要求严格、响应速度要求较快的系统,就要采取措施减小输入/输出滞后的不利影响。






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