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ROC800-Series Instruction Manual

1-18

General Information

Revised Jul-14

Voltage tests (battery low and battery high) ensure the ROC800 has

enough power to run. The ROC800 operates with 12 Volts dc

(nominal) power provided either through a PM-12 or PM-24 power

input module (see

Figures 3-1

or

3-2

). The LED at the top of each

module lights when you apply input power with the proper polarity

and startup voltage. For the PM-12 module, apply 9.00 to 11.25

volts DC to the BAT+/BAT- connectors; for the PM-24 module,

apply 20 to 30 volts DC to the POWER INPUT +/POWER INPUT –

connectors; and for the PM-30 module, apply 10.5 to 30.0 volts DC

to the POWER INPUT +/POWER INPUT – connectors.

The CPU controls the software “watchdog.” This watchdog checks

the software for validity every 2.7 seconds. If necessary, the

processor automatically resets.

The ROC800 monitors Multi-Variable Sensor(s), if applicable, for

accurate and continuous operation.

A memory validity self-test is performed to ensure the integrity of

memory.

1.5.6 Low Power Modes

The ROC800 uses low power operation under predetermined conditions

and supports two low power modes, Standby and Sleep.

Standby

The ROC800 uses this mode during periods of inactivity. When the

operating system cannot find a task to run, the ROC800 enters

Standby mode. This mode keeps all peripherals running and is

transparent to the user. The ROC800 wakes from Standby mode

when it needs to perform a task.

Sleep

The ROC800 uses this mode if it detects a low battery voltage. The

System AI Battery Point Number 1 measures the battery voltage and

compares it to the LoLo Alarm limit associated with this point. (The

default value for the LoLo Alarm limit is 10.6 Volts dc.) When in

Sleep mode, AUX

sw

is turned off. For information on configuring

alarms and System AI points, refer to the

ROCLINK 800

Configuration Software User Manual (for ROC800-Series)

(Part

Number D301250X012) or the

ROCLINK 800 Configuration

Software User Manual (for ROC800L)

(Part Number

D301246X012).

Notes

:

Sleep mode applies

only

to ROC800s using the 12 V dc Power

Input module (PM-12).

The design of the PM-30 and PM-24 power modules does not

include the low voltage cutoff feature present in the PM-12

module: should power fall below the set LoLo alarm (a default