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产品描述:TRICON 3704E 隔离式模拟输入控制器

1.1什么是TRICON?

TRICON是一种现代化的可编程逻辑与过程控制器，可以提供高水土的系统容错能力的控制器3下面说明衮错是怎么二回事并列患TRICON系统的主要特性。.

1.1.1什么是容错?

容错是TRCON系统的最为重要的能力，它是指对瞬态的和稳态的出错情况的探查发现的能力以及采取适当的相应的在线措施的能力。具有容错能力时，控制器及其控制的过程的安全性得以增强，利用率得以提高。

TRICON通过三重组合式冗余结构(TMR)而给出其容错能力。此系统由三个完全相同的系统支路组成(电源模件除外，该模件是双重冗余的)。每个系统支路独立地执行控制程序，并与其它两个支路并行工作。硬件表决机制则对所有来自区域场的数字式输入和输出进行考核和验定。模拟输入则经受中值选择处理过程。

因为每一个支路都是和其它两个隔离的，任一支路内的任何一个单点失效都不会传递给其它两支。如果在一支内有硬件故障发生，该失效的一支就能被其它两支所补偿。所以修理工作，包括拆卸和更换失效的支路内的失效模件都可以在TRICON在线情况下进行，不使过程中断。系统能自行重新配置而进行充分的TMR运作。

对于各个支路、各模件和各功确电路的广泛的诊断工作能够及时地探查到运行中的故障，并用指示器或警报作出报告。诊断还可以把有关故障的信息存储在系统变量内。在发现有故障时，操作者可以利用诊断信息以修改控制动作，或者指导其维护过程。

从用户的观点看，使用是简单的，因为此三重系统工作起来和一个控制系统一样。用户连接感应器和作动器于单一的接线端上，并且用一组应用逻辑为TRICON编程。其余的事都由TRICON自行经管。

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Product Description :TRICON 3704E Isolated analog input controller

1.1 What is TRICON?

TRICON is a modern programmable logic and process controller that can provide a high system fault tolerance controller 3 below explains how two things are side-by-side suffering from the main features of TRICON systems. .

1.1.1 What is Fault Tolerance?

Fault tolerance is the most important capability of TRCON system, which refers to the ability to detect transient and steady error situations and take appropriate online measures. With fault tolerance, the safety and utilization of the controller and the processes it controls are enhanced.

TRICON gives its fault tolerance through the triple combined redundant structure (TMR). This system consists of three identical system branches (except for the power module, which is doubly redundant). Each system branch executes the control program independently and works in parallel with the other two branches. The hardware voting mechanism checks and validates all digital inputs and outputs from the field. Analog inputs undergo a median selection process.

Because each branch is isolated from the other two, any single point failure in any branch is not transmitted to the other two branches. If a hardware failure occurs on one side, that failure can be compensated for by the other two. As a result, repair work, including removal and replacement of failed modules in failed branches, can be carried out while TRICON is online without interrupting the process. The system can reconfigure itself for full TMR operation.

Extensive diagnostic work for each branch, each module and each power circuit can detect faults in operation in time and report them with indicators or alarms. Diagnostics can also store information about faults in system variables. When a fault is found, the operator can use the diagnostic information to modify the control action or to guide its maintenance process.

From the user's point of view, use is simple because this triple system works like a control system. Users connect sensors and actuators to a single terminal and program TRICON with a set of application logic. The rest is handled by TRICON itself.

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