>>>>>型号:9566-810 端子底座 提供三重模块冗余结构
【功能描述】
为了保证在任何时候系统都有的完整性，Tricon有如下特点：
—提供三重模块冗余结构，三个完全相同的分电路各自独立地执行控制程度。而且备有专用的硬件/软件结构，可对输入和输出进行“表决”。
—能耐受严酷的工业环境。
—能够现场安装，可以现场在线地进行模块级的安装和修复工作而不需打乱现场接线。
—能支持多达118个I/O模块（模拟的和数字的）和选装的通讯模块，通讯模块可以与Modbus主站和从站连接，或者和Foxboro与Honeywell分布控制系统（DCS）、其它在Peer-to-Peer网络内的各个Tricon、以及在TCP/IP网络上的外部主机相连接。
—可以支持位于远离主机架12公里（7.5英里）以内的远程I/O模块。
—利用基于WINDOWS系统的编程软件完成控制程序的开发及调试。
—在输入和输出模块内备有智能功能，减轻主处理器的工作负荷。每个I/O模块都有三个微处理器。输入模块的微处理器对输入进行过滤和修复，并诊断模块上的硬件故障。输出模块微处理器为输出数据的表决提供信息、通过输出端的反馈回路电压检查输出状态的有效性、并能诊断现场线路的问题。
—提供全面的在线诊断，并具有修理能力。
—可以在Tricon正常运行时进行常规维护而不中断控制过程。
—对I/O模块提供“热备”支持，可用在某些不能及时提供服务的关键场合。
系统配置
具体地说，一个基本的Tricon高密系统由下列部件组成：模块、容纳各模块的机架、现场端子板、以及编程工作站。本节简要说明这些主要的部件及其规格。
Tricon模块
Tricon模块由装在一金属骨架内的电子元件所构成，可就地更换。当模块从机架上取下时，也不暴露保证任何部分或电路。印刷电路板上的接头使得各模块不可以头朝下地插入，各模块上的“键”又可避免模块被插入到错误的槽内。
Tricon支持数字的和模拟的输入与输出点，以及热电偶输入和多种通讯能力。
电源模块
每个Tricon机架有二个电源模块，以双重冗余方式工作。每个电源能独立承担机架中所有模块的供电，每个电源在机架的背面装有独立的电源导轨。并有内部的诊断电路用以检查电压的输出范围和超温条件。每个模块从背板上获取电源，每个分电路都配有两个独立的电压调整器，分电路短路只能影响这个分电路的电源调整器，而不影响整个电源总路线
主处理器模块
Tricon系统包含三个主处理器模块。每个模块控制系统的独立的一路，并与其它两个主处理器并行工作（见下图）。
每个主处理器上有一个专用的I/O通讯处理器，用以管理在主处理器和I/O模块之间交换的数据。一条三重I/O总线位于机架的背板上，机架间通过I/O总线电缆连接。
当每个输入模块被询问时，I/O总线的相应的一支就把新的输入数据传递给主处理器。输入数据汇成表存入主处理器内，并存入存储器以备用于硬件表决。
主处理器内的每一单个输入表通过TriBus传到其邻近的主处理器。在此传送过程中，完成硬件表决。TriBus利用一直接存储器存取可编程装置而对三个主处理器之间的数据进行同步、传送、表决、以及比较。
如果发现不一致，信号在两个表中是一致的，则对第三个表进行修正。由于取样时间差异而造成的差别可用不同的数据图样进行限制。每个主处理器把数据的必要的修正保持在当地存储器内。任何差异都被标识，并在扫描结束时被Tricon的内部故障分析器来判断某一模块是否存在故障。
主处理器把修正过的数据送入控制程序。32位的主微处理器和相邻的主处理器模块一起并行执
行控制程序。
根据用户在程序中定义的规则，可生成一个基于输入值表的输出值汇总表。每个主处理上的I/O
处理器通过I/O总线把输出数据送至输出模块。
数字输入模块
Tricon提供两种基本类型的数字输入模块：TMR和简易型。在TMR模块上，全部关键的信道都被100%地三重化，以保证安全性和利用率。在简易型模块上，只有那些保证安全运行所需的信号通路部分才被三重化。简易型模块用于低成本比利用率更重要的关键安全场合。
>>>>>型号:9566-810 端子底座 提供三重模块冗余结构
【英文介绍】
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.
>>>>>型号:9566-810 端子底座 提供三重模块冗余结构
