ABB模块SAM3.0系列供应海洋结构分析应用计数器备件

ABB模块SAM3.0系列供应海洋结构分析应用计数器备件

ABB模块SAM3.0系列供应海洋结构分析应用计数器备件PLC通常作为“状态”机运行：它们读取所有输入，通过逻辑执行，然后驱动输出。用户编写的逻辑通常是一个大型RLL程序，这意味着您可能必须使整个PLC离线才能进行任何大小的更改。由于PLC和人机接口（MMI）软件包的分离，而不是DCS的中央数据库，您也会遇到数据库同步问题。PLC将在独立配置中运行。DCS控制器通常需要操作员界面和通信，因此可以发送警报、消息、趋势更新和显示更新。许多PLC安装使用第三方供应商的接口软件来改进图形和各种级别的报警、趋势分析和报告。PLC和MMI软件通常通过位于网络上并使用寄存器交换机制进行交互，以从各种PLC获取数据并将数据发送到各种PLC。这种类型的通信假设您有预先分配的数据寄存器，并且可以在地址的基础上获取数据。这可能会导致数据处理错误（例如，来自错误的输入），而DCS的中央数据库不会遇到这些错误。一些PLC使用专有网络，而其他PLC可以使用局域网。无论哪种方式，通信功能都是相同的取放寄存器。如果太多的PC试图通过网络与太多的PLC通信，这可能会导致瓶颈和定时问题。

 The Table (original article) compares the features and functions of a DCS and PLC. Given the wide range of customization and new development, these comparisons are generic. The ratings are not a simple "Yes/No" but rather an indication of how each supports these features, relative to an "idealized" model. Cars are generally more comfortable than pickup trucks, but you can modify a pickup to be as comfortable as some cars. We usually select a car over a truck when comfort is what we are looking for. You may find a DCS or PLC is a "comfortable truck." Obviously, the table doesn&＃39;t quite agree with this, but the ratings are helpful, given the diversity of the various vendors&＃39; products.

Today, the decision between PLC and DCS often depends on business issues rather than technical features. Questions to consider are those involving:

• The internal expertise to execute the project,

• Level of support available from a vendor/integrator,

• Long-term maintainability, and

• Life-cycle costs.

PLCs and DCSs overlap in their features, but also have distinct strengths and weaknesses. When deciding between the two, know who will deliver and support your system, and how they will do it.

ABB模块SAM3.0系列供应海洋结构分析应用计数器备件

ABB SAM3.0 

ABB PCD235B1101 3BHE032025R1101 

HONEYWELL R7247C1001 

ABB V17152-310

BENTLY 3500/25 149369-01

BENTLY 3500/40M 176449-01 

ABB DSTYW121 3BSE007836R1 

BENTLY 146031-01 

ABB NRAO01 

HONEYWELL HCIX15-TE-FA-NC 

ABB VBS01 

ABB RXTUG 22H 1MRK000592-A 

ABB RXIIK 4  1MRK001643-AA 

ABB RXEDK 2H 1MRK000841-RA 

ABB RXDS 4 1MRK000344-A

ABB DSTS105 3BSE007286R1 

ABB DI650 3BHT300025R1

ABB RXEDK 2H 1MRK000841-RA 

ABB DSTS106 3BSE007287R1 

ABB RXPPK 2H 1MRK001615-AA 

BENTLY 3500/92 136180-01 

BENTLY 3500/25 149369-01

Cutler-Hammer C825KN10 200A 600V 

ABB V17111-110 

SANYO P30B04010PCKST 2个 张云良

ABB TC560V2 3BSE022178R1

ABB PPC907BE 3BHE024577R0101

HONEYWELL FC-TSHART-1620M 

ICS TRIPLEX T8110B 

PROSOFT MVI56E-MCM