Numeric Text Field (COMA DISPLAY)

I am using an Numeric Text Field to send INPUTS to the the PLC. However when I type 789,45 the object shows 78,945. Why that? How Ignition understands the “comma”?
Another question, is there a way to forbid the “COMA”. I only need to write using the “DOT”. like 789.45

Thank you
I’m using Ignition 8.1.