This is the first step in creating a Discrete Parameter. The important thing is to get the Data type correct, you cannot change from Analog to Discrete to Text. All other properties can be changed.
Chosen from a Pull Down List on the Create Parameter properties page. Parameters are IO device driver dependant. Different drivers use different parameters.
Range:
analog, discrete or text.
Field
Type:
Text
Tag
field:
.PTYPE read only