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:SP for the setpoint of a Temperature controller,
TIC101:MEAS for the measurement,
TIC101:OUTP for the output of the primary controller.
Range: up to 7 alphanumeric characters.
Field Type: Text
Tag field: .PNAME
Figure 5-11Parameter Names: AM, DI, DO, MEAS and SP on tag TIC101