Table Of Contents

cRIO-904x LEDs

Version:
    Last Modified: August 30, 2018

    Learn more about the LEDs for your cRIO-904x.

    Figure 1. cRIO-904x Front Panel LEDs
    1. POWER LED
    2. STATUS LED
    3. USER1 LED
    4. USER FPGA1 LED
    5. Gigabit Ethernet LEDs
    6. SD In Use LED

    POWER LED Indicators

    The POWER LED on the cRIO-904x indicates which power input is in use, as shown in the following table.

    Table 1. POWER LED Indicators
    LED Color LED Pattern Indication
    Green Solid The cRIO-904x is powered from the V1 input.
    Yellow Solid The cRIO-904x is powered from the V2 input.
    Off The cRIO-904x is powered off.

    For more information about connecting the cRIO-904x to power, refer to Connecting the Controller to Power.

    STATUS LED Indicators

    The following table describes the STATUS LED indicators.

    Table 2. STATUS LED Indicators
    LED Color LED Pattern Indication
    Yellow Blinks twice and pauses

    The cRIO-904x is in safe mode. Software is not installed, which is the factory default state, or software has been improperly installed on the cRIO-904x.

    An error can occur when an attempt to upgrade the software is interrupted. Reinstall software on the cRIO-904x. Refer to Installing Software on the Controller for information about installing software on the cRIO-904x.

    Blinks three times and pauses

    The cRIO-904x is in user-directed safe mode, or the cRIO-904x is in install mode to indicate that software is currently being installed.

    This pattern may also indicate that the user has forced the cRIO-904x to boot into safe mode by pressing the reset button for longer than five seconds or by enabling safe mode in MAX. Refer to the RESET Button section of Buttons for information about safe mode.

    Blinks four times and pauses

    The cRIO-904x is in safe mode. The software has crashed twice without rebooting or cycling power between crashes.

    Continuously blinks

    The cRIO-904x has not booted into NI Linux Real-Time. The cRIO-904x either booted into an unsupported operating system, was interrupted during the boot process, or detected an unrecoverable software error.

    On momentarily

    The cRIO-904x is booting. No action required.

    Red Continuously blinks

    This indicates a hardware error. An internal power supply has failed. Check front-panel I/O and C Series module connections for shorts. Remove any shorts and cycle power the cRIO-904x. If the problem persists, contact NI.

    Solid The cRIO-904x internal temperature has exceeded a critical threshold. Ensure the ambient operating temperature does not exceed the specified operating temperature. If the problem persists, contact NI.
    Off

    The cRIO-904x is in run mode. Software is installed and the operating system is running.

    Ethernet LED Indicators

    The following table lists the Ethernet LED indicators.

    Table 3. Ethernet LED Indicators
    LED LED Color LED Pattern Indication
    ACT/LINK - Off LAN link not established
    Green Solid LAN link established
    Flashing Activity on LAN
    10/100/1000 Yellow Solid 1,000 Mbit/s data rate selected
    Green Solid 100 Mbit/s data rate selected
    - Off 10 Mbit/s data rate selected

    SD In Use LED Indicator

    The cRIO-904x has a SD In Use LED to indicate the card drive mount status. The following table lists details of the SD In Use LED indicator.

    Table 4. SD In Use LED Indicator
    LED LED Color LED Pattern Indication
    SD IN USE Green Off There is no SD card present in the slot or the cRIO-904x has unmounted the SD card from the operating system. It is safe to remove the SD card from the slot.
    Solid The SD card in the slot is mounted in the operating system. Do not remove the SD card while this LED is lit.

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