BENTLY 3300/14

• 型号：3300/14


• 数量：3


• 制造商： 厦门雄霸电子商务有限公司


• 有效期：2020/8/8 0:00:00

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用PLC完成对体系的操控是十分便利的。这是由于：首先PLC操控逻辑的建立是程序,用程序替代硬件接线。编程序比接线，更改程序比更改接线，当然要便利得多！ 

其次PLC的硬件是高度集成化的，已集成为种种小型化的模块。并且，这些模块是配套的，已完成了系列化与规格化。种种操控体系所需的模块，PLC厂家多有现货供应，商场上即可购得。所以，硬件体系配置与建造也十分便利。 

正因如此，用可编程序操控器才有这个"可"字。对软件讲，它的程序可编，也不难编。对硬件讲，它的配置可变，并且也易于变。 

详细地讲，PLC有五个方面的便利： 

（1）配置便利：可接操控体系的需求确定要运用哪家的PLC，那种类型的，用什么模块，要多少模块，确定后，到商场上定货购买即可。 

（2）装置便利：PLC硬件装置简略，拼装简略。外部接线有接线器，接线简略，并且一次接好后，替换模块时，把接线器装置到新模块上即可，都不必再接线。内部什么线都不要接，只需作些必要的DIP开关设定或软件设定，以及编制好用户程序就可作业。 

（3）编程便利：PLC内部尽管没有什么实际的继电器、时间继电器、计数器，但它通进程序（软件）与体系内存，这些器材却实实在在地存在着。其数量之多是继电器操控体系难以想象的。即便是小型的PLC，内部继电器数都能够千计，时间继电器、计数也以百计。并且，这些继电器的接点可无限次地运用。PLC内部逻辑器材之多，用户用起来已不感到有什么约束。唯一考虑的仅仅入出点。而这个内部入出点即运用得再多，也无关紧要。大型PLC的操控点数可达万点以上，哪有那么大的现实体系？若实在不够，还可联网进行操控，不受什么约束。PLC的指令体系也十分丰富，可毫不困难地完成种种开关量，以及模拟量的操控。PLC还有存储数据的内存区，可存储操控进程的所有要保存的信息。……总之，由于PLC功用之强，发挥其在操控体系的效果，所受的约束已不是PLC自身，而是人们的想象力，或与其配套的其它硬件设施了。 

PLC的外设很丰富，编程器种类许多，用起来都较便利，还有数据监控器，可监控PLC的作业。运用PLC的软件也许多，不仅可用类似于继电电路设计的梯形图言语，有的还可用BASIC言语、C言语，以至于自然言语。这些也为PLC编程供给了便利。 

PLC的程序也便于存储、移植及再运用。某定型产品用的PLC的程序完善之后，凡这种产品都可运用。出产一台，拷贝一份即可。这比起继电器电路台台设备都要接线、调试，要省事及简略得多。

（4）修理便利：这是由于： 

①PLC作业牢靠，呈现毛病的状况不多，这大大减轻了修理的作业量。这在讲述PLC的第三个特点时，还将进一步介绍。 

②即便PLC呈现毛病，修理也很便利。这是由于PLC都设有许多毛病提示信号，如PLC支持内存坚持数据的电池电压不足，相应的就有电压低信号指示。并且，PLC自身还可作毛病状况记录。所以，PLC出了毛病，很易确诊。同时，确诊出毛病后排故也很简略。可按模块排故，而模块的备件商场能够买到，进行简略的替换就能够。至于软件，调试好后不会出毛病，再多只需依据运用经验进行调整，使之完善就是了。 

（5）改用便利：PLC用于某设备，若这个设备不再运用了，其所用的PLC还可给别的设备运用，只需改编一下程序，就可办到。假如原设备与新设备差别较大，它的一些模块还可重用。

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