ABB模塊SAM3.0系列供應(yīng)海洋結(jié)構(gòu)分析應(yīng)用計數(shù)器備件

ABB模塊SAM3.0系列供應(yīng)海洋結(jié)構(gòu)分析應(yīng)用計數(shù)器備件PLC通常作為“狀態(tài)”機(jī)運(yùn)行：它們讀取所有輸入，通過邏輯執(zhí)行，然后驅(qū)動輸出。用戶編寫的邏輯通常是一個大型RLL程序，這意味著您可能必須使整個PLC離線才能進(jìn)行任何大小的更改。由于PLC和人機(jī)接口（MMI）軟件包的分離，而不是DCS的中央數(shù)據(jù)庫，您也會遇到數(shù)據(jù)庫同步問題。PLC將在獨(dú)立配置中運(yùn)行。DCS控制器通常需要操作員界面和通信，因此可以發(fā)送警報、消息、趨勢更新和顯示更新。許多PLC安裝使用第三方供應(yīng)商的接口軟件來改進(jìn)圖形和各種級別的報警、趨勢分析和報告。PLC和MMI軟件通常通過位于網(wǎng)絡(luò)上并使用寄存器交換機(jī)制進(jìn)行交互，以從各種PLC獲取數(shù)據(jù)并將數(shù)據(jù)發(fā)送到各種PLC。這種類型的通信假設(shè)您有預(yù)先分配的數(shù)據(jù)寄存器，并且可以在地址的基礎(chǔ)上獲取數(shù)據(jù)。這可能會導(dǎo)致數(shù)據(jù)處理錯誤（例如，來自錯誤的輸入），而DCS的中央數(shù)據(jù)庫不會遇到這些錯誤。一些PLC使用專有網(wǎng)絡(luò)，而其他PLC可以使用局域網(wǎng)。無論哪種方式，通信功能都是相同的取放寄存器。如果太多的PC試圖通過網(wǎng)絡(luò)與太多的PLC通信，這可能會導(dǎo)致瓶頸和定時問題。

 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模塊SAM3.0系列供應(yīng)海洋結(jié)構(gòu)分析應(yīng)用計數(shù)器備件

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個 張?jiān)屏?/p>

ABB TC560V2 3BSE022178R1

ABB PPC907BE 3BHE024577R0101

HONEYWELL FC-TSHART-1620M 

ICS TRIPLEX T8110B 

PROSOFT MVI56E-MCM