User Button; Led Indications; Power Led; Status Led - National Instruments roboRIO User Manual

• One stop bit
• No flow control

User Button

The User Button produces a logic TRUE when depressed and a logic FALSE when not
depressed. The User Button is not debounced in hardware.

LED Indications

Note The Radio, Comm, and Mode LEDs do not indicate any specific condition of
the device but can be configured to display a set of colors or turned off completely.

Power LED

The Power LED is a dual-color red/green LED that indicates specific conditions, as shown in
the following table.
Color State
Off Off Power is outside valid input range.
Green Solid Power is valid with no fault condition.
Red Solid Brownout condition detected. The user rail and outputs are disabled.

Status LED

The Status LED is a single-color yellow LED. The Status LED is off during normal operation.
The NI roboRIO 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 roboRIO indicates specific error conditions by flashing the Status
LED a certain number of times every few seconds, as shown in the following table.
Number of Flashes
Every Few Seconds
2
3
18 | ni.com | NI roboRIO User Manual
Table 13. Power LED Indications
Table 14. Status LED Indications
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.
The device is in safe mode.
Indication
Indication