TRICONEX ML093290424 fault-tolerant controller

TRICONEX ML093290424 fault-tolerant controller

What is Fault-Tolerant  Control? 

A fault-tolerant control system identifies and compensates for failed control  system elements and allows repair  while continuing an assigned task  without process interruption. A highintegrity control system such as the  Tricon is used in critical process applications that require a significant degree  of safety and availability.

What is the Tricon? 

The Tricon is a state-of-the art  controller that provides fault tolerance  by means of Triple-Modular Redundant  (TMR) architecture. TMR integrates  three isolated, parallel control systems  and extensive diagnostics in one control  system. The system uses two-out-ofthree voting to provide high-integrity,  error-free, uninterrupted process operation with no single point of failure.

The Tricon controller uses three identical channels. Each channel independently executes the control program in  parallel with the other two channels.  Specialized hardware/software voting  mechanisms qualify and verify all  digital inputs and outputs from the  field, while analog inputs are subject to  a mid-value selection process.

Because each channel is isolated from  the others, no single-point failure in any  channel can pass to another. If a hardware failure does occur on one channel,  the other channels override it. Meanwhile the faulting module can easily be  removed and replaced while the controller is online without interrupting  the process.

Other key features of the Tricon  controller that ensure the highest  possible system integrity are:

• No single point of failure 

• Ability to operate with 3, 2 or 1  Main Processor before shutdown 

• Fully implemented and transparent  triplication 

• Comprehensive system diagnostics 

• Complete range of I/O modules 

• Dual and single I/O modules for  safety-critical points with a limited  need for availability 

• Remote I/O up to 7.5 miles  (12 kilometers) away from MPs 

• Simple, online module repair 

• Unsurpassed reliability and  availability

What about Communication  Capabilities? 

Optional modules enable the Tricon to  communicate with other Triconex  controllers and with other hosts such as: 

• Modbus masters and slaves 

• Distributed Control Systems (DCS) 

• Operator workstations 

• Host computers using Ethernet  (802.3) protocol

What is TriStation? 

TriStation 1131 Developer's Workbench is an integrated tool for developing, testing and documenting control  programs that execute in the Tricon  controller. TriStation 1131 complies  with the IEC 61131 International Standard for Programmable Controllers and  follows the Microsoft Windows guidelines for graphical user interfaces.

What are Typical User  Applications? 

Each day the Tricon supplies increased  safety, reliability and availability to a  worldwide installed base. The  following are a few typical applications. For more information on how a  Tricon controller can add value to your  applications, ask your sales representative for additional documentation and  customer references.