3008 | Invensys PROCESSOR MODULE

3008 Main Processor, 16 megabytes DRAMModel 3008 Main Processors (MP) are available for Tricon v9.6 and later systems. For detailed specifications, see the Planning and Installation Guidefor Tricon Systems. 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 programDuring 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.Extensive diagnostics validate the health of each MP, I/O module and communication channel. Transient are recorded and masked by the hardware majority-voting circuit. Persistent faults are diagnosed and the errant module is hot-replaced. 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