TRICONEX 8310N2

Description

TRICONEX 8310N2
To ensure the highest possible system integrity at all times, the Trident controllerincludes the following features:Trident Planning and Installation Guide• Provides Triple Modular Redundant (TMR) architecture, whereby each ofthree identical channels independently executes the application, andspecialized hardware and software mechanisms vote all inputs and outputs.• Withstands harsh industrial environments.• Integrates the I⁄O module with the termination assembly.• Enables field installation and repair to be done at the module level while thecontroller remains online without disturbing field wiring.• Supports up to 14 I⁄O modules. (If the controller includes AO or PIModules, up to 10 modules are supported.)• Provides TriStation and Modbus communication directly from the MainProcessor (MP) or from the Communication Module (CM).• Executes applications developed and debugged using TriStation.• Provides a dedicated co-processor which controls the input and outputmodules to reduce the workload of the MP. Each I⁄O module is supported bycustom application-specific integrated circuits (ASICs), which scan inputsand perform diagnostics to detect hardware faults. Output module ASICs dothe following:– Supply information for voting of output data.– Check I⁄O loop-back data from the output terminal for final validation ofthe output state.– Perform diagnostics to detect hardware and field-wiring problems.• Provides integral online diagnostics with adaptive-repair capabilities.• Allows normal maintenance while the controller is operating, withoutdisturbing the controlled process.• Supports hot-spare I⁄O modules for critical applications for which promptservice may not be possible.• Provides integral support for redundant field and logic power sources.
Fault tolerance, the most important capability of the controller, is the ability todetect transient and steady-state error conditions and take appropriate correctiveaction online. Fault tolerance provides an increase in safety and the availability ofthe controller and the process being controlled.The Trident controller provides fault tolerance through TMR architecture. Thecontroller consists of three identical channels (except for the power modules whichare dual-redundant). Each channel independently executes an application inparallel with the other two channels. Voting mechanisms qualify and verify alldigital inputs and outputs from the field; analog inputs are subject to a mid-valueselection process.Because each channel is isolated from the others, no single-point failure in anychannel can pass to another. If a hardware failure occurs in one channel, the faultychannel is overridden by the other channels. Repair consists of removing andreplacing the failed module in the faulty channel while the controller is online andwithout process interruption.Extensive diagnostics on each channel, module, and functional circuit immediatelydetect and report operational faults by means of indicators or alarms. All diagnosticfault information is accessible by the application and the operator. The operator canuse the diagnostic information to modify control actions or direct maintenanceprocedures