ABB DSQC604 3HAC12928-1 电源装置

ABB DSQC604 3HAC12928-1 电源装置

ABB DSQC604 3HAC12928-1 电源装置

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。

DCS的特点是：

（1）控制功能强。可实现复杂的控制规律，如串级、前馈、解耦、自适应、最优和非线性控制等。也可实现顺序控制。

（2）系统可靠性高。

（3）采用CRT操作站有良好的人机界面。

（4）软硬件采用模块化积木式结构。

（5）系统容易开发。

（6）用组态软件，编程简单，操作方便。

（7）有良好的性价比。

ABB DSQC604 3HAC12928-1 电源装置

The structure difference between PLC system and DCS system is not much, but the difference in the focus of function, DCS focuses on closed-loop control and data processing. PLC focuses on logic control and switching quantity control, and can also achieve analog quantity control.

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

DCS features:

(1) Strong control function. It can realize complex control laws, such as cascade, feedforward, decoupling, adaptive, optimal and nonlinear control. Sequence control is also possible.

(2) High system reliability.

(3) The CRT operation station has a good man-machine interface.

(4) The software and hardware adopt modular building block structure.

(5) The system is easy to develop.

(6) With configuration software, programming is simple, easy to operate.

(7) Good cost performance.