
NI myRIO-1900 User Guide and Specifications
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© National Instruments
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13
Understanding LED Indications
Power LED
The Power LED is lit while the NI myRIO-1900 is powered on. This LED indicates that the
power supply connected to the device is adequate.
Status LED
The Status LED is off during normal operation. The NI myRIO-1900 runs a power-on self test
(POST) when you apply power to the device. During the POST, the Power and Status LEDs turn
on. When the Status LED turns off, the POST is complete. The NI myRIO-1900 indicates
specific error conditions by flashing the Status LED a certain number of times every few
seconds, as shown in Table 4.
LEDs 0-3
You can use LEDs 0-3 to help debug your application or easily retrieve application status. Logic
TRUE turns an LED on and logic FALSE turns an LED off.
Using the USB Host Port
The NI myRIO-1900 USB host port supports Web cameras that conform to the USB Video
Device Class (UVC) protocol as well as machine vision cameras that conform to the USB3
Vision standard and are USB 2.0 backward compatible. The NI myRIO-1900 USB host port also
supports Basler ace USB3 cameras.
The NI myRIO-1900 USB host port also supports USB Flash drives and USB-to-IDE adapters
formatted with FAT16 and FAT32 file systems. LabVIEW usually maps USB devices to the
/U
,
/V
,
/W
, or
/X
drive, starting with the
/U
drive if it is available.
Table 4.
Status LED Indications
Number of Flashes
Every Few Seconds
Indication
2
The device has detected an error in its software. This usually
occurs when an attempt to upgrade the software is interrupted.
Reinstall software on the device.
3
The device is in safe mode.
4
The software has crashed twice without rebooting or cycling
power between crashes. This usually occurs when the device runs
out of memory. Review your RT VI and check the memory usage.
Modify the VI as necessary to solve the memory usage issue.
Continuously flashing
or solid
The device has detected an unrecoverable error. Contact National
Instruments.