TRLC0NEX Tricon fault-tolerant controller

2. System chassis configuration

(1) Chassis type and layout

Main chassis (Model 8110): accommodates 3 main processors, 2 power modules, and provides 6 logic slots (including hot spare positions)+1 COM slot.

Expansion chassis (Model 8111): No main processor, provides 8 logical slots, suitable for expansion within 100 feet (30 meters), and can be extended up to 1000 feet in restricted scenarios.

Remote Expansion Chassis (Model 8112): Equipped with RXM module, supporting fiber optic transmission, suitable for ultra long distance expansion.

Mechanical specifications: 19 inches wide x 22.75 inches high x 17.75 inches deep, made of cold-rolled steel material, with a main chassis weight of approximately 24.5kg.

(2) Chassis interconnection and power supply limitations

Interconnection method: Connected through a triple I/O bus cable (Model 9000), with a transmission rate of 375kbps, supporting up to 15 chassis networking (1 main+14 expansion/remote).

Power supply limitation: Under 60 ° C environment, a single power module outputs 175 watts, which needs to be planned and configured according to the module power consumption (such as NCM 20 watts, ACM 15 watts).

3. On site terminal options

External Terminal Panel (ETP): Passive PCB board that supports on-site wiring and quick module replacement. Available in standard, basic, hazardous area (non flammable), and intermediate relay types, with a coverage of 8/16/32/64 points.

Fan out cable: a low-cost alternative solution that connects one end to the chassis backplane and provides 50 lead wires with pin markings on the other end. It is only suitable for digital I/O modules and supports a maximum length of 99 feet (30 meters).

Terminal protection: Some panels are integrated with fuses and current limiting resistors, supporting overcurrent protection. Hazardous area panels are certified by T Ü V and suitable for Zone 2 and Class 1 Division 2 scenarios.

System software and programming tools

1. Core programming platform: TriStation 1131 Developer's Workbench

Compatibility: Supports Windows NT/2000/XP systems, compatible with Tricon v9.1 and above controllers in different versions (such as v4.1.433 compatible with v9.5-x-10.1. x).

Programming standard: Complies with IEC 61131-3 standard, supports three core languages+optional languages:

Function Block Diagram (FBD): Graphic circuit based programming, suitable for logical interconnection.

Ladder diagram (LD): Based on relay logic symbols, suitable for traditional industrial control scenarios.

Structured Text (ST): A Pascal like high-level language that supports complex arithmetic operations and conditional statements.

Optional CEMPLE language: Causal matrix programming, automatically converted to FBD, suitable for designing safe shutdown strategies.

Core functions: project management, controller configuration, tag declaration, program simulation testing, download and real-time monitoring, diagnostic data viewing.

New features (v4.1): Windows XP compatibility, automatic backup of project files, ST code export, enhanced diagnostic monitor (standalone application).

2. Sequence of Events (SOE) function

Principle: The main processor detects state changes (events) of specified discrete variables during scanning, records variable states, timestamps, and stores them in the SOE buffer.

Key parameters: A single SOE block can support up to 20000 events, with a total capacity of 60000 events and a time synchronization accuracy of ± 25 milliseconds (Peer to Peer network).

Data application: Supports exporting event data through Triconex SOE software, SMM/ACM module, or OPC client to generate reports for fault tracing and downtime analysis.

Trigger mechanism: Control event collection, stopping, status query, and clearing through the SOESRT/SOESTOP/SOESTAT/SOECLR function blocks.

3. Communication protocols and applications

Supported protocols: Modbus (RTU/ASCII/TCP), Ethernet (802.3), Peer to Peer, TSAA, SNTP, GPS timing, etc.

Typical applications: Interconnection with DCS systems (Honeywell TDC 3000, Foxboro I/A), operator workstations, third-party Modbus devices, network printers, supporting data reading and writing, alarm transmission, and time synchronization.

Typical application scenarios

Tricon controllers are widely used in global industrial safety critical scenarios, with core applications including:

1. Emergency safety shutdown (ESD)

Scenario: Equipment such as reactors and compressors in refineries, petrochemical plants, and chemical plants, monitoring parameters such as pressure, feed rate, and temperature.

Advantages: Compared to traditional mechanical/electronic relays, it reduces false shutdowns, supports sensor integrity detection, integrated control and safety functions, and connects with monitoring networks to achieve real-time status feedback.

2. Boiler flame safety control

Scenario: Start/stop interlocking, flame monitoring and protection of steam boilers in refineries.

Advantages: Integrating traditional decentralized protection functions, improving operational efficiency, and ensuring safety not inferior to electromechanical protection systems.

3. Turbine control system

Scenario: Speed control, start stop sequence, and fault protection of gas/steam turbines.