Chapter 10 - Create/Edit

Trend

The Trend Type dropdown allows the user to define the trend type (COV or Timed). This field can be edited in existing Trend Objects.

The Value field allows the user to define the time interval for time-based trends. The default value is 900 seconds (15 minutes). The minimum value is 1 second, and the maximum value is 480 hours or 1728000 seconds.

The Start Date/Time and Stop Date/Time checkboxes allow the user to enter a trend start and stop Date/Time. This option can be edited in existing Trend Objects. By default, these checkboxes are not checked, so a trend start and stop Date/Time are all wildcarded.

The Start Date/Time fields allow the user to specify a date/time value for a trend to begin (if the enable checkbox is checked). These fields can be edited in existing Trend Objects.

The Stop Date/Time fields allow the user to specify a date/time value for a trend to end (if the enable checkbox is checked). These fields can be edited in existing Trend Objects.

The Stop when full checkbox allows the user to define whether trending will stop when the trend log is full. Otherwise new trend records will rollover old trend records. This checkbox defaults to unchecked (NO).

The Notification Threshold field allows the user to define the notification threshold for filling the trend buffer. This field defaults to 80% of maximum samples.

The Notification Class dropdown allows the user to select the notification class desired for sending alarm notification. This option can be edited in existing Trend Objects. This field defaults to Notification 0 or the first Notification Class.

For more information on trending, see the TALON Controllers User's Manual (588- 580).

Off-Node Trending

On-node trending is when the trended object resides in the local panel.

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125-3584T

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Siemens 125-3584T manual Off-Node Trending