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ROC827 Instruction Manual
Issued Mar-06 General Information 1-5
The ROC827 holds up to six communication ports (refer to Chapter 5,
Communications). Three communication ports are built-in:
Local Operator Interface (LOI) – Local Port EIA-232 (RS-232D).
Ethernet – Comm1 Port for use with the DS800 Development Suite
Software.
EIA-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:
EIA-232 (RS-232C) – Point-to-point asynchronous serial
communications include Data Terminal Ready (DTR) support, Ready
To Send (RTS) support, and radio power control.
EIA-422/EIA-485 (RS-422/RS-485) – Point-to-point (EIA-422) or
multiple-point (EIA-485) asynchronous serial communications.
Multi-Variable Sensor (MVS) – Interfaces with MVS Sensors (up to
two modules per ROC827).
Dial-up modem – Communications over a telephone network (14.4K
V.42 bis with throughput up to 57.6K bps).
Hot-Swappable &
Hot-Pluggable
Modules—whether I/O or communication—easily install in the
module 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:
32-bit microprocessor based on Motorola
MPC862 Quad Integrated
Communications Controller (PowerQUICC
™
) PowerPC
processor.
SRAM (Static Random Access Memory) with battery backup.
Flash ROM (Read-Only Memory).
SDRAM (Synchronous Dynamic Random Access Memory).