INTELLIX MO150 GE

The structure of PLC system and dcs system is not very different,but the focus of the function is different.DCS focuses on closed-loop control and data processing.PLC focuses on logic control and switch control,and can also realize analog control.

The key to a DCS or PLC system is communication.It can also be said that the data highway is the backbone of the distributed control system DCS and PLC.Since its task is to provide a communication network between all components of the system,the design of the data highway itself determines the overall flexibility and security.The media of the data highway can be:a pair of twisted wires,coaxial cable,or fiber optic cable.

PLC系统与dcs系统的结构差异不大，只是在功能的着重点上的不同，DCS着重于闭环控制及数据处理。PLC着重于逻辑控制及开关量的控制，也可实现模拟量控制。

DCS或PLC系统的关键是通信。也可以说数据公路是分散控制系统DCS及PLC的脊柱。由于它的任务是为系统所有部件之间提供通信网络，因此，数据公路自身的设计就决定了总体的灵活性和安全性。数据公路的媒体可以是：一对绞线、同轴电缆或光纤电缆。