TRICONEX TRICON 3007 CPU communicates with Honeywell (UCN) 

Description

Overview

Essential details：TRICONEX TRICON 3007 CPU communicates with Honeywell (UCN) 

Products Description

The Triconex system is based on the TMR patented technology that supports up to Safety Integrity Level 3 (SIL 3) and is usually used as a safety rather than a control system.^[1]

Operating theory[edit]

Fault tolerance in the Tricon is achieved by means of a Triple-Modular Redundant (TMR) architecture. The Tricon provides error-free, uninterrupted control in the presence of either hard failures of components, or transient faults from internal or external sources. The Tricon is designed with a fully triplicated architecture throughout, from the input modules through the Main Processors to the output modules. Every I/O module houses the circuitry for three independent legs. Each leg on the input modules reads the process data and passes that information to its respective Main Processor. The three Main Processors communicate with each other using a proprietary high-speed bus system called the TriBus. Once per scan, the three Main Processors synchronize and communicate with their two neighbors over the TriBus. The Tricon votes digital input data, compares output data, and sends copies of analog input data to each Main Processor. The Main Processors execute the userwritten application and send outputs generated by the application to the output modules. In addition to voting the input data, the TriBus votes the output data. This is done on the output modules as close to the field as possible to detect and compensate for any errors between the Tricon voting and the final output driven to the field.

TRICONEX 30083008

Hardware[edit]

The Triconex system usually consists of the following typical modules:

• Main Processor modules (triple).
• Communication module(s) .
• Input and output modules: can be analog and/or digital and work singularly or in hot-spare (standby).
• Power supply modules (redundant).
• Backplane(s) (chassis) that can hold the previous modules.
• System cabinet(s): can compact one or more chassis in one cabinet.
• Marshalling cabinets to adapt and standardize interface connections between the field instruments and the Triconex system cabinets.
• Human machine interface (HMI) to monitor the events.
• Engineering workstation (EWS) for programming. monitoring, troubleshooting, and updating.

Software[edit]

The Triconex main processors can communicate with the so-called TriStation 1131 application software to download, update and/or monitor programs.^[3] These programs are either written in:

• Function Block Diagram language,
• Ladder diagram language, or
• Structured text (Pascal like) Language.
• Cause and Effect Matrix Programmable Language (CEMPLE).

(Function Block Diagram, Ladder diagram and Structured Text are defined in IEC1131-3)

Besides, a Sequence of Events (SOE) recorder software and Diagnostic monitor software are implemented.

Triton malware[edit]

In December 2017, it was reported that the safety systems of an unidentified power station, believed to be in Saudi Arabia were compromised when the Triconex industrial safety technology made by Schneider Electric SE was targeted in what is believed to have been a state sponsored attack. The computer security company Symantec claimed that the malware, known as “Triton”, exploited a vulnerability in computers running the Microsoft Windows operating system.

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