Model 3008 Main Processors (MP)
- Compatibility: Available for Tricon v9.6 and later systems.
- Installation Requirement: Three MPs must be installed in the Main Chassis of every Tricon system.
- Functionality: 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.
Diagnostics
Extensive diagnostics validate the health of each MP, I/O module, and communication channel.
- Transient Faults: Recorded and masked by the hardware majority-voting circuit.
- Persistent Faults: Diagnosed, and the errant module can be hot-replaced.
MP Diagnostics Tasks:
- Verify fixed-program memory and static RAM.
- Test all basic processor and floating-point instructions and operating modes.
- Validate user memory using 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 RS-485 transceivers.
- Verify the TriClock and TriBus interfaces.
Physical Description of Model 3008 Main Processors
| Feature |
Description |
| Microprocessor |
Motorola MPC860, 32 bit, 50 MHz |
| Memory |
– 16 MB DRAM (non-battery backed-up) |
|
– 32 KB SRAM, battery backed-up |
|
– 6 MB Flash PROM |
| Tribus Communication Rate |
– 25 megabits per second |
|
– 32-bit CRC protected |
|
– 32-bit DMA, fully isolated |
| I/O Bus and Communication Bus Processors |
Motorola MPC860, 32 bit, 50 MHz |
Indicators on Main Processors
| Indicator |
Description |
| PASS |
Module has passed self-diagnostic tests |
| FAULT |
Module has a fault and should be replaced |
| ACTIVE |
Module is executing the user-written control program |
| MAINT1 |
Maintenance indicator 1 |
| MAINT2 |
Maintenance indicator 2 |
| COM TX |
Transmitting data across COMM bus |
| COM RX |
Receiving data from COMM bus |
| I/O TX |
Transmitting data across I/O bus |
| I/O RX |
Receiving data from I/O bus |
Tricon Communication Module (TCM)
- Compatibility: Only with Tricon v10.0 and later systems.
- Purpose: Allows the Tricon to communicate with:
- TriStation 1131
- Other Tricon or Trident controllers
- Modbus master and slave devices
- External hosts over Ethernet networks
Features of TCM:
- Ports:
- Four serial ports
- Two network ports
- One debug port (for Triconex use)
- Serial Port Configuration:
- Each serial port is uniquely addressed and can be configured as a Modbus master or slave.
- Serial Port #1: Supports either the Modbus or the Trimble GPS interface.
- Serial Port #4: Supports either the Modbus or the TriStation interface.
- Data Rate: Supports an aggregate data rate of 460.8 kilobits per second across all four serial ports.
Communication
- Any standard Modbus device can communicate with the Tricon through the TCM, provided that aliases are assigned to the Tricon variables. Alias numbers must also be used when interfacing with host systems.
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