5.2.6.2            Parameter Name

Users and operators will reference the elements in a block by appending the parameter name to the Block Tag name, Blockname:parametername. You should pick a parameter name that will be meaningful to ordinary users and operators. Do not include blank spaces within your parameter name.

For example, a Foxboro 761 device:

TIC101:DESCR1 for the Description of a Temperature controller,
TIC101:TEXTMSG1 for the Text Message in the controller
 

Range:                    up to 7 alphanumeric characters.
Field Type:            Text
Tag field:               .PNAME