>>>>>型號:9566-810 端子底座 提供三重模塊冗余結(jié)構(gòu)
【功能描述】
為了保證在任何時候系統(tǒng)都有的完整性，Tricon有如下特點：
—提供三重模塊冗余結(jié)構(gòu)，三個完全相同的分電路各自獨立地執(zhí)行控制程度。而且備有專用的硬件/軟件結(jié)構(gòu)，可對輸入和輸出進行“表決”。
—能耐受嚴(yán)酷的工業(yè)環(huán)境。
—能夠現(xiàn)場安裝，可以現(xiàn)場在線地進行模塊級的安裝和修復(fù)工作而不需打亂現(xiàn)場接線。
—能支持多達118個I/O模塊（模擬的和數(shù)字的）和選裝的通訊模塊，通訊模塊可以與Modbus主站和從站連接，或者和Foxboro與Honeywell分布控制系統(tǒng)（DCS）、其它在Peer-to-Peer網(wǎng)絡(luò)內(nèi)的各個Tricon、以及在TCP/IP網(wǎng)絡(luò)上的外部主機相連接。
—可以支持位于遠離主機架12公里（7.5英里）以內(nèi)的遠程I/O模塊。
—利用基于WINDOWS系統(tǒng)的編程軟件完成控制程序的開發(fā)及調(diào)試。
—在輸入和輸出模塊內(nèi)備有智能功能，減輕主處理器的工作負荷。每個I/O模塊都有三個微處理器。輸入模塊的微處理器對輸入進行過濾和修復(fù)，并診斷模塊上的硬件故障。輸出模塊微處理器為輸出數(shù)據(jù)的表決提供信息、通過輸出端的反饋回路電壓檢查輸出狀態(tài)的有效性、并能診斷現(xiàn)場線路的問題。
—提供全面的在線診斷，并具有修理能力。
—可以在Tricon正常運行時進行常規(guī)維護而不中斷控制過程。
—對I/O模塊提供“熱備”支持，可用在某些不能及時提供服務(wù)的關(guān)鍵場合。
系統(tǒng)配置
具體地說，一個基本的Tricon高密系統(tǒng)由下列部件組成：模塊、容納各模塊的機架、現(xiàn)場端子板、以及編程工作站。本節(jié)簡要說明這些主要的部件及其規(guī)格。
Tricon模塊
Tricon模塊由裝在一金屬骨架內(nèi)的電子元件所構(gòu)成，可就地更換。當(dāng)模塊從機架上取下時，也不暴露保證任何部分或電路。印刷電路板上的接頭使得各模塊不可以頭朝下地插入，各模塊上的“鍵”又可避免模塊被插入到錯誤的槽內(nèi)。
Tricon支持數(shù)字的和模擬的輸入與輸出點，以及熱電偶輸入和多種通訊能力。
電源模塊
每個Tricon機架有二個電源模塊，以雙重冗余方式工作。每個電源能獨立承擔(dān)機架中所有模塊的供電，每個電源在機架的背面裝有獨立的電源導(dǎo)軌。并有內(nèi)部的診斷電路用以檢查電壓的輸出范圍和超溫條件。每個模塊從背板上獲取電源，每個分電路都配有兩個獨立的電壓調(diào)整器，分電路短路只能影響這個分電路的電源調(diào)整器，而不影響整個電源總路線
主處理器模塊
Tricon系統(tǒng)包含三個主處理器模塊。每個模塊控制系統(tǒng)的獨立的一路，并與其它兩個主處理器并行工作（見下圖）。
每個主處理器上有一個專用的I/O通訊處理器，用以管理在主處理器和I/O模塊之間交換的數(shù)據(jù)。一條三重I/O總線位于機架的背板上，機架間通過I/O總線電纜連接。
當(dāng)每個輸入模塊被詢問時，I/O總線的相應(yīng)的一支就把新的輸入數(shù)據(jù)傳遞給主處理器。輸入數(shù)據(jù)匯成表存入主處理器內(nèi)，并存入存儲器以備用于硬件表決。
主處理器內(nèi)的每一單個輸入表通過TriBus傳到其鄰近的主處理器。在此傳送過程中，完成硬件表決。TriBus利用一直接存儲器存取可編程裝置而對三個主處理器之間的數(shù)據(jù)進行同步、傳送、表決、以及比較。
如果發(fā)現(xiàn)不一致，信號在兩個表中是一致的，則對第三個表進行修正。由于取樣時間差異而造成的差別可用不同的數(shù)據(jù)圖樣進行限制。每個主處理器把數(shù)據(jù)的必要的修正保持在當(dāng)?shù)卮鎯ζ鲀?nèi)。任何差異都被標(biāo)識，并在掃描結(jié)束時被Tricon的內(nèi)部故障分析器來判斷某一模塊是否存在故障。
主處理器把修正過的數(shù)據(jù)送入控制程序。32位的主微處理器和相鄰的主處理器模塊一起并行執(zhí)
行控制程序。
根據(jù)用戶在程序中定義的規(guī)則，可生成一個基于輸入值表的輸出值匯總表。每個主處理上的I/O
處理器通過I/O總線把輸出數(shù)據(jù)送至輸出模塊。
數(shù)字輸入模塊
Tricon提供兩種基本類型的數(shù)字輸入模塊：TMR和簡易型。在TMR模塊上，全部關(guān)鍵的信道都被100%地三重化，以保證安全性和利用率。在簡易型模塊上，只有那些保證安全運行所需的信號通路部分才被三重化。簡易型模塊用于低成本比利用率更重要的關(guān)鍵安全場合。
>>>>>型號:9566-810 端子底座 提供三重模塊冗余結(jié)構(gòu)
【英文介紹】
To ensure the integrity of the system at all times, Tricon has the following features:
- Provides a triple module redundancy structure where three identical sub-circuits independently perform the degree of control. There is also a dedicated hardware/software structure to "vote" on inputs and outputs.
- Withstand harsh industrial environments.
- Can be installed on site, and can be installed and repaired online at the module level without disrupting onsite cables.
- Supports up to 118 I/O modules (analog and digital) and optional communication modules that can be connected to Modbus master and slave stations. Or connect Foxboro to Honeywell Distributed Control Systems (DCS), other Tricons within Peer-to-Peer networks, and external hosts over TCP/IP networks.
- Can support remote I/O modules located up to 12 km (7.5 mi) away from the main frame.
- Complete the development and debugging of the control program by using programming software based on WINDOWS system.
- Intelligent functions in the input and output modules to reduce the workload of the main processor. Each I/O module has three microprocessors. The input module's microprocessor filters and repairs the input and diagnoses hardware failures on the module. The output module microprocessor provides information for the voting of the output data, checks the validity of the output status by the feedback loop voltage at the output, and can diagnose problems with the field line.
- Provide comprehensive online diagnostics with repair capabilities.
- Routine maintenance can be performed while Tricon is operating normally without interrupting the control process.
- Provides hot backup for I/O modules in critical situations where services cannot be provided in a timely manner.
System configuration
Specifically, a basic Tricon high-density system consists of the following components: modules, racks housing each module, field terminal boards, and programming workstations. This section briefly describes these major components and their specifications.
Tricon module
The Tricon module consists of electronic components housed in a metal skeleton and can be replaced in situ. When the module is removed from the rack, no guaranteed parts or circuits are exposed. The connectors on the printed circuit board prevent the modules from being inserted headdown, and the "keys" on the modules prevent the modules from being inserted into the wrong slots.
Tricon supports digital and analog input and output points, as well as thermocouple input and a variety of communication capabilities.
Power module
Each Tricon rack has two power modules that work in double redundancy. Each power supply can independently supply power to all modules in the rack, and each power supply is equipped with an independent power guide rail on the back of the rack. There is also an internal diagnostic circuit to check the voltage output range and overtemperature conditions. Each module obtains power from the backplane, and each sub-circuit is equipped with two independent voltage regulators. A short circuit in the sub-circuit can only affect the power regulator in this sub-circuit, but not the entire power supply route
Main processor module
The Tricon system consists of three main processor modules. Each module controls an independent path of the system and works in parallel with the other two main processors (see figure below).
Each main processor has a dedicated I/O communication processor that manages the data exchanged between the main processor and the I/O module. A triple I/O bus is located on the backplane of the rack, and the racks are connected by an I/O bus cable.
When each input module is queried, the corresponding branch of the I/O bus passes the new input data to the main processor. A table of input data is stored in the main processor and stored in memory for use in hardware voting.
Each individual input table within the main processor is passed to its neighboring main processor via TriBus. During this transfer, hardware voting is completed. It uses a direct memory access programmable device to synchronize, transfer, vote, and compare data between the three main processors.
If an inconsistency is found and the signal is consistent in both tables, the third table is corrected. Differences due to sampling time differences can be limited by different data patterns. Each host processor keeps the necessary corrections to the data in local memory. Any differences are identified and used by Tricon's internal fault analyzer at the end of the scan to determine whether a particular module is faulty.
The main processor feeds the corrected data into the control program. The 32-bit main microprocessor is executed in parallel with adjacent main processor modules
Line control program.
According to the rules defined by the user in the program, a summary table of the output values can be generated based on the input value table. I/O on each master process
The processor sends the output data to the output module through the I/O bus.
Digital input module
Tricon offers two basic types of digital input modules: TMR and Simple. On the TMR module, all critical channels are 100% triaged to ensure security and utilization. On simple modules, only those parts of the signal path required for safe operation are triplicated. Simple modules are used in safety-critical situations where low cost is more important than utilization.
>>>>>型號:9566-810 端子底座 提供三重模塊冗余結(jié)構(gòu)
