STATUS LED Indicators

The STATUS LED is off during normal operation. The cRIO-9081 indicates specific software error conditions by flashing the STATUS LED yellow a certain number of times every few seconds, as shown in the following table.

Table 4. STATUS LED Software Indicators
Number of Yellow Flashes Every Few Seconds Indication
1 The chassis is unconfigured. Use MAX to configure the chassis. Refer to the Measurement & Automation Explorer Help for information about configuring the chassis.
2 The chassis has detected an error in its software. This usually occurs when an attempt to upgrade the software is interrupted. Reinstall software on the chassis. Refer to the Measurement & Automation Explorer Help for information about installing software on the chassis.
3 The chassis is in safe mode because the SAFE MODE DIP switch is in the ON position or there is no software installed on the chassis.
4 The software has crashed twice without rebooting or cycling power between crashes. This usually occurs when the chassis 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 The chassis has detected an unrecoverable error. Contact National Instruments.
Continuously Flashing or Solid The device may be configured for DHCP but unable to get an IP address because of a problem with the DHCP server. Check the network connection and try again. If the problem persists, contact National Instruments.

The cRIO-9081 indicates specific hardware error conditions by flashing the STATUS LED red a certain number of times every few seconds, as shown in the following table.

Table 5. STATUS LED Hardware Indicators
Pattern of Red Flashes Indication
Continuously Flashing An internal power supply has failed. 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 The cRIO-9081 internal temperature has exceeded a critical threshold. If the problem persists, contact National Instruments.