If you are using FlexLogger 2018 R4 or earlier, there is no way to set the acquisition mode for these modules in FlexLogger. The modules will default to using the High-Resolution mode. In this case, you can upgrade to FlexLogger 2019 R4 or perform your acquisition in another software, such as LabVIEW.
The different filtering modes and the time they take to convert 1 piece of data is explained in the datasheet for your module.
For example, the NI 9219 datasheet
shows the High resolution mode takes 500 ms to convert a piece of data, limiting the acquisition to 2 Hz.
Meanwhile, the High speed mode takes 10 ms for the conversion, so you can up to 100 Hz.