This document contains the NI-Sync known issues that were discovered before and since the release of NI-Sync 17.0. Not every issue known to NI will appear on this list; it is intended to only show the severe and common issues.
The PXI-6682 and PXI-6683 may revert to using the TCXO (because Clk10 is no longer available) without notifying the user
The PXI-6682 and PXI-6683 have a protection mechanism so that if they are running off Clk10 and Clk10 disappears, the card will revert to using the TCXO, and will not hang. However, because there is no notification, users who have configured their board to run off Clk10 might unknowingly have a board running off its own TCXO.
NI-Sync may use cached MAX configuration data.
If you place an NI PXI-6682 module in a slot which previously housed a different NI PXI-6682, NI-Sync will use the the MAX configuration data from the previous module.
Workaround: Set the NI PXI-6682 to recalculate the position on reboot.
IEEE 1588 synchronization does not work between PXI-668x modules in the same real-time PXI system. IEEE 1588 synchronization does not work between two or more PXI-668x modules that are in one of the following setups:
In a single PXI chassis with a real-time controller
Spread across multiple PXI chassis that are connected via MXI to a PXI chassis with a real-time controller
NI-Sync real-time support may fail to install if DAQmx (Full) has previously been installed without its real-time component
Workaround: Reinstall DAQmx (Full) and ensure that real-time support has installed. Once the real-time support for DAQmx has been installed, run the NI-Sync installer to install NI-Sync's real-time support.
Software triggers sent with niSync Send Software Trigger may not be sent or may be sent non-deterministically if they are requested at a frequency higher than that of the front or rear synchronization clock sources.
Workaround: Designate higher frequency synchronization clock sources with the niSync Property Node or decrease the rate at which you are requesting software triggers.