FAQ: Preventing Modification of Tag Properties Except Questionable Data, Manual Data, and Alarm Disable

Question:       I want operators to access to Questionable Data, Manual Data, and Alarm Disable tag properties, but I do not want these operators to be able to modify any other tag properties.

 

A:        Many VTS developers require that the operators of the application have the ability to flag questionable data, enter manual data for a tag, or disable alarms; however, they do not wish operators to have access to change other tag properties.

There are system privileges that deal with tag properties:

•    Alarm Disable;

•    Manual Data;

•    Parameter View;

•    Questionable; and

•    Tag Modify.

Granting the Tag Modify privilege alone provides operators with all of the above functionality. If you wish operators to have access to only the first 4 tag properties, do not grant the tag modify privilege; rather, grant the first 4 privileges instead.