A20B-1004-0960;
供应A20B-1004-0960;
A20B-1004-0960;
PLC即可编程逻辑控制器：它采用一类可编程的存储器，用于其内部存储程序，执行逻辑运算、顺序控制、定时、计数与算术操作等面向用户的指令，并通过数字或模拟式输入/输出控制各种类型的机械或生产过程。
通信方式
市面上各种类型PLC，它们各有优缺点，能够满足用户的各种需求，但在形态、组成、功能、编程等方面各不相同，没有一个统一的标准，各厂家制订的通信协议也千差万别。目前，人们主要采用以下三种方式实现PLC与PC的互联通信：
(1)使用目前通用的上位机组态软件，如COOLMAYHMI、组态王、InTouch、力控等，来实现PLC与PC机的互连通信。
(2)通过使用PLC开发商提供的系统协议和网络适配器，来实现PLC与PC机的互联通信。
(3)利用PLC厂商所提供的标准通信端口和由用户自定义的自由口通信方式来实现PLC与PC机的互连通信。
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