LED Indicators
- Updated2023-02-17
- 2 minute(s) read
LED Indicators
The IC-3121 provides the following LED indicators.
The following table describes the LEDs and indications.
| LED | LED Color | LED State | Indication |
|---|---|---|---|
| STATUS | Yellow | OFF | The IC-3121 initialized successfully and is ready for use. |
| 2 blinks | (RT only) There is no software installed, which is the out-of-box state, or the IC-3121 has detected an error in its software. The device has automatically started up into safe mode. This usually occurs when an attempt to upgrade the software is interrupted or if system files are deleted from the IC-3121. Reinstall software on the IC-3121. | ||
| 3 blinks | (RT only) The IC-3121 has booted into safe mode. Refer to the Safe Mode section for information about the safe mode state. | ||
| 4 blinks | (RT only) The IC-3121 has experienced two consecutive software exceptions. The IC-3121 automatically restarts after an exception. After the second exception, the IC-3121 remains in the exception state, alerting you to resolve the problem. Reinstall software on the IC-3121 or contact NI for assistance. Refer to the IC-3121 Getting Started Guide for information about installing software on the IC-3121. | ||
| Continuous blinking | (RT only) The IC-3121 has not booted into NI Linux Real-Time. The controller either booted into an unsupported operating system, was interrupted during the boot process, or detected an unrecoverable software error. | ||
| Solid |
(RT only) The IC-3121 is booting up. (Windows only) An internal drive is being accessed. |
||
| PWR/FAULT | — | OFF |
The IC-3121 is OFF. This is not an indication of whether power is applied or not. |
| Green | Solid |
The IC-3121 is operating normally and is properly powered on. |
|
| Red | Blinking |
The IC-3121 power-up sequence failed. |
|
| USER1/USER2 | Green/Yellow | — |
User-controlled LEDs that can be controlled using the NI System Configuration API. |