The cRIO-906x contains an internal real-time clock that maintains system time when the cRIO-906x is powered off. The system clock of the cRIO-906x is synchronized with the internal real-time clock at startup. You can set the real-time clock using MAX, or you can set the clock programmatically using LabVIEW.

Refer to the specifications for your controller for the real-time clock accuracy specifications.