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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