C200H-OD212
C200H-OD212
C200H-OD212
流程控制指令，用以控制程序运行流程。PLC的用户程序一般是从零地址的指令开始执行，按顺序推进。但遇到流程控制指令也可作相应改变。流程控制指令也较多，运用得好，可使程序简练，并便于调试与阅读。
状态监控指令，用以监视及记录PLC及其控制系统的工作状态，对提高PLC控制系统的工作可靠性大有帮助。
当然，并不是所有的PLC都有上述那么多类的指令，也不是有的PLC仅有上述几类指令。以上只是指出几个例子，说明要从哪几个方面了解PLC指令，从中也可大致看出指令的及功能将怎样影响PLC的性能。
除了指令，为进行通讯，PLC还有相应的协议与通讯指令或命令，这些也反映了PLC的性能。
6支持软件
为了便于编制PLC程序，多数PLC厂家都开发有关计算机支持软件。
从本质上讲，PLC所能识别的只是机器语言。它之所以能使用一些助记符语言、梯形图语言、流程图语言，以至高级语言，全靠为使用这些语言而开发的种种软件。
我们这里有您急需的停产备件，优势现货，询不到的，买不到的，请联系我们！！
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