Rules for Using Time Profiles for Limit Profiles with WITS Database Points

If you want to configure variable limits for a WITS analog point or counter point, you will need to use one or more Time Profiles. While Time Profiles can be used by several ClearSCADA drivers, there are certain rules that you need to follow when using them with WITS. The rules differ, depending on the type of WITS database point.

 

For analog points (and integrator points and rate-of-change points):

• The Time Profile has to be a Float type of Time Profile.
• The Time Profile has to have its Mode set to Stepped and Time Zone set to UTC.
• The Maximum Vectors Per Day has to be set so that it is equal to, or lower than the maximum number of vectors per day specified in the Field Device's Device Profile (see Display a WITS Device Profile).
• The minimum number of vectors per day is 1.
• The first vector for each day has to be at midnight (as specified by the Water Industry Telemetry Standard).
• The range of the Time Profile has to be within the Zero Scale and Full Scale of the points that will use the Time Profile (see Alarm Limits for WITS Analog Points).
  

 

For counter points:

• The Time Profile has to be a Double type of Time Profile (as ClearSCADA scales counter points).
• The Time Profile has to have its Mode set to Stepped and Time Zone set to UTC.
• The Maximum Vectors Per Day has to be set so that it is equal to, or lower than the maximum number of vectors per day specified in the Field Device's Device Profile (see Display a WITS Device Profile).
• The minimum number of vectors per day is 1.
• The first vector for each day has to be at midnight (as specified by the Water Industry Telemetry Standard).
• The range of the Time Profile has to be between 0 and (2³² - 1) × Multiplier for the points that will use the Time Profile. (For more details on the Multiplier setting, see Configure the Multiplier Value in the ClearSCADA Guide to the DNP3 Driver.

 

For state counter and state runtime points:

• The Time Profile has to be an Unsigned Long type of Time Profile (state counter and state runtime points are not scaled)
• The Time Profile has to have its Mode set to Stepped and Time Zone set to UTC.
• The Maximum Vectors Per Day has to be set so that it is equal to, or lower than the maximum number of vectors per day specified in the Field Device's Device Profile (see Display a WITS Device Profile).
• The minimum number of vectors per day is 1.
• The first vector for each day has to be at midnight (as specified by the Water Industry Telemetry Standard).