Hello Mike,
some things are not perfect with your vi, just have a look at it now...
The value at "Wait until next multiple" is completly wrong! Have a look
at the help!
Why don't you use "Get Date/Time in seconds" or "Tick Count" as your time stamp?
Best regards,
GerdW
using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019