Cause: Excel’s internal memory leak with frequent cell updates.
Fix: In PLX-DAQ v2.11, go to Settings > Logging Interval and increase to 250ms or higher. Disable Excel's "AutoSave" and "AutoRecover" temporarily.
To successfully run PLX-DAQ v2.11, the following environment is recommended: Plx-daq Version 2.11 Download -2021-
Because the original Parallax forums have shifted, finding the genuine 2021 build can be tricky. Here is how to get the safe, clean version: Cause: Excel’s internal memory leak with frequent cell
PLX-DAQ 2.11 is not high‑speed. It maxes out around 50–100 samples per second, and large macros can slow Excel. It’s also Windows‑only, and modern Mac Excel no longer supports VBA in the same way. Hardware:
But for its intended job — slow sensors (temperature, humidity, pressure, light, analog voltages) over hours or days — it’s nearly perfect.