METSO IOP331 控制器

METSO  IOP331 控制器

0P331美卓METSO控制器,

PLC是以功能命名,DCS是以体系结构命名。

??从原理上看 PLC就可以组成DCS

??当然两者性能差异还是存在的,要具体看产品和需要

??DCS控制系统与PLC控制系统区别:

??DCS是一种“分散式控制系统”,而 PLC(可编程控制)只是一种控制“装置”两者是“系统”与“装置”的区别。系统可以实现任何装置的功能与协调,PLC装置只实现本单元所具备的功能。

?DCS网络是整个系统的神经,DCS系统通常采用的国际标准协议 TCP/P。它是安全可靠双几余的高速通讯网络 系统的拓展性与开放性再好,而 PLC因为基本上都为单个小系统工作在与别的PLC或上位机进行通讯时,所采用的网络形式基本都是单网结构,网络协议也经常与国际标准不符。

??DCS整体考虑方案 操作员站都具备工程师站功能 站与站之间在运行方案程序下装后是一种紧密联合的关系,任何站、任何功能、任何被控装署间都是相互连销控制,协调控制而单用 PLC写相接构成的系统,其站与(PLC与PLC)之间的联系则是一种松散连接方式,做不出协调控制的功能。

METSO  IOP331 控制器

0P331 METSO Controller,

PLC is named after the function,DCS is named after the architecture.

?? In principle, PLC can form DCS

?? Of course, there are still performance differences between the two, depending on the specific product and needs

?? DCS control system and PLC control system difference:

?? DCS is a "distributed control system", and PLC(programmable control) is just a control "device", the two are "system" and "device" difference. The system can realize the functions and coordination of any device, and the PLC device only realizes the functions of this unit.

? DCS network is the nerve of the whole system,DCS system usually adopts the international standard protocol TCP/P. It is a safe and reliable high-speed communication network system expansion and openness, and PLC because basically for a single small system to work with other PLC or PC communication, the network form used is basically a single network structure, the network protocol is often inconsistent with international standards.

?? DCS as a whole, the program operator station has a close joint relationship between the functional station and the station after the installation of the operation program, and any station, any function, and any controlled installation are mutually connected control, coordinated control and single use The system composed of PLC write connection, the connection between the station and (PLC and PLC) is a loose connection, can not do the function of coordination control.

METSO  IOP331 控制器

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