Enable case-sensitive UOM abbreviations

Case-sensitive UOM abbreviations are enabled by default in PI AF 2017 R2 and later versions. For older versions of PI AF server, UOM abbreviations are not enabled. To enable case-sensitive UOMs, see PI AF Diagnostics utility.

Enable case-sensitive UOM abbreviations

To enable case-sensitive UOM abbreviations, you enter afdiag /ucs on the command line.

A new UOM, millivolt with a UOM abbreviation of mV, is added to the UOM database provided that there is no conflict with existing units of measure.

Disable case-sensitive UOM abbreviations

You can reset the PI AF server to case-insensitive UOM abbreviations with the same afdiag utility.

To disable case-sensitive UOM abbreviations, you enter afdiag /ucs- on the command line.

If any existing UOM abbreviations differ only by case, the utility does not allow the feature to be disabled and displays a list of the conflicting abbreviations. At a minimum, you need to remove the millivolt unit of measure that was created when you enabled case-sensitive UOM abbreviations, because millivolt (mV) conflicts with megavolt (MV).