TRICON 3704E 隔离模拟输入 现代化的可编程逻辑与过程控制器

1.1 What is TRICON?
TRICON is a modern programmable logic and process controller that delivers high water
Soil the system’s fault tolerance of the controller 3 below explains how the two things are side-by-side suffering from the main features of the TRICON system. .
1.1.1 What is Fault Tolerance?
Fault tolerance is the most important capability of TRICON system, which refers to the transient and steady state
The ability to detect errors and take appropriate online action accordingly. 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 department
The 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. So repair work, including removal and replacement of the failed module in the failed branch can be performed with TRICON online, no
Interrupt the process. The system can reconfigure itself for full TMR operation.

Extensive diagnostic work for each branch, each module and each functional 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.