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。
MVME51105E-2161
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
The MOTOROLA MVME51105E-2161 processor module has strong redundancy function. Redundancy and hot standby are two completely different technologies, and many manufacturers completely confuse these two concepts to mislead customers. Most redundant fault switching times are at the US level, which is a strict seamless switching. However, hot standby comes with many software features, and switching slower, such as a company’s 400 series or large PLC, can take several minutes. At the same time, there are also several different implementation methods for redundancy, such as dual port RAM and serial communication, which have significant cost and capability differences. Users need to carefully investigate when selecting. Each DPU has a real-time database, which is divided into multiple blocks based on the number of stations and internal and external data. Each station sends its own variables in full through broadcasting, and each station receives global variables broadcasted from other stations. This allows each station to obtain real-time data from other stations, allowing DCS to effectively control a large system.
MVME51105E-2161
The controller of DCS and HMI (Human Machine Interface) are usually integrated, which is also suitable for large process control rooms, making DCS display a strong PC root. The control network of the MOTOROLA MVME51105E-2161 processor module is usually closed, interacting with it through a historical database or gateway. At the same time, the definition of engineer station and operator station in DCS is clearer and more obvious than in PLC engineering system. PLC: There is no conflict with small micro PLCs, as their structure and design are completely different from the other two types of products. But due to the extensive use of PCs in large and medium-sized PLCs_ BASE technology makes it basically indistinguishable from DCS and IPC+soft logic, just because most of these manufacturers were previously PLC manufacturers and their customer base was PLC customers, so their products are called PLCs.
MVME51105E-2161
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