TRICONEX 3008 Main Processor Modules

TRICONEX 3008 Main Processor Modules

Three MPs must be installed in the Main Chassis of every Tricon system.Each MP independently communicates with its I/O subsystem and executes the user-written control program.

Sequence of Events (SOE) and Time Synchronization
During each scan, the MPs inspect designated discrete variables for state changes known as events. When an event occurs, the MPs save the current variable state and time stamp in the buffer of an SOE block.

If multiple Tricon systems are connected by means of NCMs, the time synchronization capability ensures a consistent time base for effective SOE time-stamping.

The 3008's extensive diagnostics verify the health of each MP, I/O module, and communication channel. Transient faults are logged and masked by hardware majority voting circuits, permanent faults are diagnosed, and faulty modules can be hot-swapped out.

MP diagnostics perform these tasks:
• Verify fixed-program memory and static RAM
Test all basic processor and floatingpoint instructions and operating
modes
• Validate user memory by means of the TriBus hardware-voting circuitry
• Verify the shared memory interface with each I/O communication processor and channel
• Verify handshake and interrupt signals between the CPU, each I/O communication processor and channel
• Check each I/O communication processor and channel microprocessor, ROM, shared memory access and loopback of RS485 transceivers
• Verify the TriClock and TriBus interfaces