Emerson ROC827 instruction manual Central Processor Unit CPU

ROC827 Instruction Manual

The ROC827 holds up to six communication ports (refer to Chapter 5,

Communications). Three communication ports are built-in:

ƒLocal Operator Interface (LOI) – Local Port EIA-232(RS-232D).

ƒEthernet – Comm1 Port for use with the DS800 Development Suite Software.

ƒEIA-232(RS-232C)– Comm2 Port for point-to-point asynchronous serial communications.

Communication modules (which install in the ROC827’s Comm3, Comm4, and Comm5 slots) provide additional ports for communicating with a host computer or other devices. Modules include:

ƒEIA-232(RS-232C)– Point-to-point asynchronous serial communications include Data Terminal Ready (DTR) support, Ready To Send (RTS) support, and radio power control.

ƒEIA-422/EIA-485 (RS-422/RS-485) – Point-to-point(EIA-422) or multiple-point(EIA-485) asynchronous serial communications.

ƒMulti-Variable Sensor (MVS) – Interfaces with MVS Sensors (up to two modules per ROC827).

ƒDial-up modem – Communications over a telephone network (14.4K V.42 bis with throughput up to 57.6K bps).

Hot-Swappable & Modules—whether I/O or communication—easily install in the Hot-Pluggablemodule slots. Modules are both “hot-swappable” (they can be

removed and another module of the same kind installed while the ROC827 is powered) and “hot-pluggable” (they can be installed directly into unused module slots with the ROC827 is powered).

Modules are also self-identifying, which means that the ROCLINK 800 Configuration software recognizes the module (although you may need to configure the module using the software). The modules have extensive short circuit, overvoltage protection, and are self-resetting after a fault clears.

1.2.1 Central Processor Unit (CPU)

The CPU contains the microprocessor, the firmware, connectors to the backplane, the three built-in communication ports (two with LEDs), a LED low power wakeup button, a RESET button, the application license key connectors, a STATUS LED indicating system integrity, and the main processor.

CPU components include:

ƒ32-bit microprocessor based on Motorola→ MPC862 Quad Integrated Communications Controller (PowerQUICC™) PowerPC→ processor.

ƒSRAM (Static Random Access Memory) with battery backup.

ƒFlash ROM (Read-Only Memory).

ƒSDRAM (Synchronous Dynamic Random Access Memory).

Issued Mar-06 General Information 1-5