Table 7. LED 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.
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IC-3121 User Manual