Rockwell Automation Publication 2198-UM004A-EN-P - October 2019 197
Modes of Operation Chapter 10
For example:
UY: Filter Width Setting
When the pulse frequency is too high, the pulse width becomes smaller than the
filter width setting, which causes this pulse to be filtered out as noise. Thus, the
filter width must be set smaller than the actual pulse width. Set the filter width to
be four times smaller than the actual pulse width.