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ROC800-Series Instruction Manual

Revised Jul-14

General Information

1-9

1.3.1 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 Motorola MPC862 Quad Integrated Communications

Controller (PowerQUICC) PowerPC processor. Bus clock frequency

at 65 MHz with a watchdog timer.

Flash ROM (Read-Only Memory).

SDRAM (Synchronous Dynamic Random Access Memory).

Diagnostic monitoring.

Real-Time Clock.

Automatic self-tests.

Power saving modes.

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

EIA-232 (RS-232C) serial Comm2 port.

Ethernet Comm1 port.

1.3.2 Real-Time Clock (RTC)

You can set the ROC800’s real-time clock (RTC) for year, month, day,

hour, minute, and second. The clock provides time stamping of the

database values. The battery-backed clock firmware tracks the day of

the week and corrects for leap year. The time chip automatically

switches to backup power when the ROC800 loses primary input power.

The internal Sanyo 3-volt CR2430 lithium battery provides backup for

the data and the RTC when the main power is not connected. The

battery has a one-year minimum backup life with the battery installed,

the jumper disengaged, and no power applied to the ROC800. The

battery has a ten-year backup life with the backup battery installed and

power applied to the ROC800 or when the battery is removed from the

ROC800.

Note

:

If the real-time clock does not keep the current time when you

remove power, replace the lithium battery.

1.3.3 Diagnostic Monitoring

The ROC800 has diagnostic inputs incorporated into the circuitry for

monitoring system integrity. Use ROCLINK 800 software to access the

System Analog Inputs (on the directory tree, double-click

I/O

,

System

Analog Input

, and

#1, Battery

to open the System Analog Input

screen). Refer to

Table 1-3

.