MVME51105E-2161 处理器模块 都会接收和新其它站广播过来的全局变量

MVME51105E-2161 处理器模块 都会接收和新其它站广播过来的全局变量

MOTOROLA MVME51105E-2161 处理器模块超强的冗余功能，冗余与热备这是两种完全不同的技术，很多厂商完全混淆这两种概念误导客户，大多数冗余的故障切换时间都在us级，这是严格的无缝切换，而热备则带有很多的软件特征，切换慢一点的如某公司的400系列某型大型PLC，需要数分钟之久。同时冗余也还有双通过双口RAM和通过串行通信等数种不同的实现方式，这里面带有着相当大的成本和能不同，用户在选取时需要认真调研。每一个DPU内均有一块实时数据库，实时数据库按站数和内外分成多块，每个站都用广播方式将自己的变量全量发送出去，同时每个站都会接收和新其它站广播过来的全局变量，这样使每个站都可以实时的得到其它站的数据，从而使DCS可以很好的控制一个大系统。

DCS的控制器和HMI(人机界面）通常是合二为一的，这也比较适合大型过程控制的室，这使DCS显示出浓厚的PC根源。MOTOROLA MVME51105E-2161 处理器模块的控制网络通常都是封闭的，通过一个历史数据库或者网关与交互，同时DCS对于工程师站、操作员站的定义比PLC工程体系要为清晰和明显。PLC:小型微型PLC倒没什么冲突，因为结构和的原因与其它两类产品完全不同。但中大型PLC因为大量使用PC_BASE技术使其与DCS和IPC+软逻辑基本上没有差别，只是因为这些厂商大多之前就是PLC厂商而且客户群都是PLC的客户，所以他的产品就叫PLC。

MVME51105E-2161 处理器模块 都会接收和新其它站广播过来的全局变量
MOTOROLA MVME51105E-2161 processor module super redundant function, redundancy and hot spare this is two completely different technologies, many manufacturers completely confuse the two concepts to mislead customers, most of the redundancy failover time are in the us level, which is strict seamless switching, and hot spare with a lot of software characteristics, A slower switch, such as a company's 400 series of a large PLC, takes a few minutes. At the same time, there are also several different ways to achieve redundancy through dual-port RAM and serial communication, which has considerable cost and energy differences, and users need to carefully investigate when choosing. Each DPU has a real-time database, the real-time database is divided into multiple blocks according to the number of stations and inside and outside, each station will broadcast its own variables sent out in full, while each station will receive and new global variables broadcast from other stations, so that each station can get the data of other stations in real time, so that DCS can control a large system.

The DCS controller and HMI(human machine interface) are usually combined in one, which is also more suitable for large process control rooms, which makes DCS show a strong PC roots. MOTOROLA MVME51105E-2161 processor module control network is usually closed, through a historical database or gateway and interaction, while DCS for engineer station, operator station definition than PLC engineering system to be clear and obvious. PLC: There is no conflict with small micro-PLC, because the structure and reasons are completely different from the other two types of products. But the large and medium PLC because of the large use of PC_BASE technology to make it with DCS and IPC+ soft logic is basically no difference, just because most of these manufacturers are PLC manufacturers before and the customer base are PLC customers, so his products are called PLC.

MVME51105E-2161 处理器模块 都会接收和新其它站广播过来的全局变量