Cmos Battery And Cmos Reset Button; Resetting The System Cmos And Bios Settings - National Instruments NI cDAQ-9139 User Manual

Chapter 1 Getting Started with the cDAQ Controller
LED
LED Color
STATUS Red
—
USER1 Green/
yellow

CMOS Battery and CMOS Reset Button

The cDAQ controller contains a CMOS battery, a lithium cell battery that stores the system
clock information when the controller is powered off. There is only a slight drain on the CMOS
battery when power is applied to the cDAQ controller power connector. The rate at which the
CMOS battery drains when power is disconnected depends on the ambient storage temperature.
For longer battery life, store the cDAQ controller at a cooler temperature. Refer to the CMOS
Battery section of the specifications document for your cDAQ controller for the expected battery
lifetime.
The
CMOS Battery Is Dead
battery is dead. The controller still starts, but the system clock is reset to the date and time of the
BIOS release. The battery is not user replaceable. If you need to replace the CMOS battery,
contact National Instruments.

Resetting the System CMOS and BIOS Settings

The cDAQ controller BIOS configuration information is stored in a nonvolatile memory
location that does not require a battery to preserve the settings. Additionally, the BIOS optimizes
boot time by saving specific system information to memory backed up by a battery (CMOS).
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Table 1-8. LED Indications (Continued)
LED State
Continuously Hardware error—An internal power supply has failed.
flashing Check front-panel I/O, CXM, and C Series module
connections for shorts. Remove any shorts and power
cycle the controller. If the problem persists, contact
National Instruments.
Solid Hardware error—The cDAQ controller internal
temperature has exceeded a critical threshold. Ensure that
the ambient operating temperature does not exceed the
range specified in the Environmental section of the
specifications document for your cDAQ controller. If the
problem persists, contact National Instruments.
Off Normal operation.
— This LED is controlled directly from your LabVIEW RT
application You can define the USER1 LED to meet the
needs of your application. To define the LED, use the RT
LEDs VI in LabVIEW. For more information about the RT
LEDs VI, refer to the LabVIEW Help.
warning appears onscreen during the power-on self test if the
Indication