Tricon™ v9–v11 Systems triconex

Main Processor Modules

A Tricon controller contains three Main Processor modules. Each Main Processor controls a separate channel of the system and operates in parallel with the other Main Processors. A dedicated I/O Processor on each Main Processor manages the data exchanged between the Main Processor and the I/O modules. A triplicated I/O bus, located on the chassis backplane, extends from chassis to chassis by means of I/O bus cables. 

As each input module is polled, the appropriate channel of the I/O bus transmits new input data to the Main Processor. The input data is assembled into a table in the Main Processor and is stored in memory for use in the voting process.

The individual input table in each Main Processor is transferred to its neighboring Main Processors over the TriBus. During this transfer, voting takes place. The TriBus uses a direct memory access programmable device to synchronize and transmit data among the three Main Processors. 

If a disagreement occurs, the signal value found in two out of three tables prevails, and the third table is corrected accordingly. One-time differences which result from sample timing variations are distinguished from a pattern of differing data. Each Main Processor maintains data about necessary corrections in local memory. The Tricon controller built-in fault analyzer routines flag any disparity in the data and use it at the end of the scan to determine whether a fault exists on a particular module. The Main Processors transmit the corrected data to the control program. The 32-bit main microprocessor executes the control program in parallel with the neighboring Main Processor modules. 

The control program generates a table of output values which are based on the table of input values according to customer-defined rules built into the control program. The I/O Processor on each Main Processor manages the transmission of output data to the output modules by means of the I/O bus. 

Using the table of output values, the I/O Processor generates output messages, each corresponding to an individual output module in the system. Each output message is transmitted to the appropriate channel of the corresponding output module over the I/O bus. For example, Main Processor A transmits the appropriate table to Channel A of each output module over I/O Bus A. The transmittal of output data has priority over the routine scanning of all I/O modules. The I/O Processor manages the data exchanged between the Main Processors and the communication modules using the communication bus which supports a broadcast mechanism. 

Main Processors receive power from dual Power Modules and power rails in the Main Chassis. A failure on one Power Module or power rail does not affect the system performance

8110 8111 8112 8310 8311 8312 3008 4200 4200-3 4201 4201-3 4351B 4352B 4353 4354

9251-210 9553-610 9561-110 9563-810 9566-810 9570-610 9572-610 9653-610 9661-510 9662-810 

9662-110 9663-610 9664-110 9668-110 9671-610 9671-810 9750-810 9750-310 9753-110 9760-210 

9761-210 9762-210 9763-810 9764-310 9765-210 9765-610 9771-210 9786-110 9791-610 9793-110