I/A Series的最大特點(diǎn)是開放，在系統(tǒng)與MIS通訊這一層上，不論是51系列還是70系列，都可以非常方便地和工廠信息網(wǎng)進(jìn)行通訊。Honeywell 發(fā)布TDC3000 標(biāo)準(zhǔn)系統(tǒng)，它增加一條UCN(Universal Control Network)網(wǎng)絡(luò)用于取代DH網(wǎng)絡(luò)。我們現(xiàn)在通常所說的TDC3000系統(tǒng)就是LCN UCN結(jié)構(gòu)的系統(tǒng)。TDC3000重新對(duì)功能進(jìn)行劃分，在LCN上增加應(yīng)用模件AM(Application Module)用于高級(jí)控制；增加PLNM（Plant Network Module）與VAX計(jì)算機(jī)的接口模件用于優(yōu)化控制；將操作站與數(shù)據(jù)存儲(chǔ)管理分開，增加了歷史模件HM(History Module)；推出萬能操作站US(Universal station) 在UCN上推出著名的PM系列控制器,同時(shí)引入安全系統(tǒng)SM(Safety Manager)用于工廠緊急安全停車。
TDC3000作為最為典型DCS系統(tǒng)，進(jìn)一步體現(xiàn)了集散控制理念，主要特點(diǎn)有：
滿足較大規(guī)模生產(chǎn)需要，兩層控制網(wǎng)絡(luò)架構(gòu)，每條LCN可以連接10條UCN,每條UCN可連接32對(duì)冗余控制器。還可以將64 條LCN通過NG連起來。
三層控制平臺(tái)
1) PMx 實(shí)現(xiàn)最基礎(chǔ)的回路調(diào)節(jié),邏輯連鎖，順序控制以及復(fù)雜回路控制。
2) AM 實(shí)現(xiàn)高級(jí)控制
3) VAX 實(shí)現(xiàn)優(yōu)化控制
緊急停車系統(tǒng)SM的引入，實(shí)現(xiàn)安全生產(chǎn)保護(hù)。
全局?jǐn)?shù)據(jù)庫概念，專用的歷史模件
萬能操作站，同時(shí)具備操作站和工程師站能力。
TDC3000最為一套最為經(jīng)典的DCS系統(tǒng)，滿足較大規(guī)模安全生產(chǎn)，復(fù)雜控制和先進(jìn)控制應(yīng)用。被大量的應(yīng)用到工業(yè)生產(chǎn)控制中，特別是很多石油化工大型聯(lián)合生產(chǎn)裝置。
TDC3000進(jìn)一步體現(xiàn)了集散控制系統(tǒng)理念，其很多設(shè)計(jì)思想在霍尼韋爾最新的控制系統(tǒng)中繼續(xù)得到應(yīng)用。
The biggest feature of i/a series is openness. On the communication layer between the system and MIS, whether it is 51 series or 70 series, it can communicate with the factory information network very conveniently.
Honeywell released TDC3000 standard system, which adds a Ucn (universal control network) network to replace DH network. The TDC3000 system we usually call now is the system of LCN Ucn structure.
TDC3000 redistributes functions and adds Application module am (Application module) to LCN for advanced control; Add the interface module between plnm (plant network module) and VAX computer to optimize control; Separate the operation station from the data storage management, and add the history module HM (history module); The universal station us (universal station) launched the famous PM series controller on Ucn, and introduced the safety system SM (Safety Manager) for the emergency and safe shutdown of the factory.
Figure 2. TDC3000 system structure
As the most typical DCS system, TDC3000 further embodies the distributed control concept, and its main features are:
It meets the needs of large-scale production and has a two-layer control network architecture. Each LCN can be connected to 10 ucns, and each Ucn can be connected to 32 pairs of redundant controllers. 64 LCNs can also be connected through ng.
Three layer control platform
1) PMX realizes the most basic loop regulation, logic interlocking, sequence control and complex loop control.
2) Am realizes advanced control
3) VAX realizes optimal control
The introduction of emergency shutdown system SM realizes safety production protection.
Global database concept, dedicated history module
Universal operation station, with the ability of operation station and engineer station at the same time.
TDC3000 is the most classic DCS system, which can meet large-scale safety production, complex control and advanced control applications. It is widely used in industrial production control, especially in many large-scale petrochemical joint production units.
TDC3000 further embodies the concept of distributed control system, and many of its design ideas continue to be applied in Honeywell's latest control system.
