## Trends for converted SuperVision® systems The following can be trended: Any input or output point Any value tied to an Analog Trend or Digital Trend microblock in the system All trend properties, including graph properties, are converted. Trend types are limited based on the following controllers: Exec 3 - can have only the following Exec 3-style trends: Standard Extended Enhanced Exec 4 - has Exec 3-style trending built in. However, if its function block was remade in Eikon with new-style trending with a trend microblock, the controller has probably been changed to use the new style. Exec 6 - can have only the new-style trends. The type of trends your SuperVision system uses at the time of conversion affects how you make changes to the trends in the WebCTRL® system. Trend types also affect the amount of trend data that can be stored, the sampling interval, and whether historical trend data can be stored in a database.
Control module | Type of trend | Number of samples stored per point | Number of points per function block or controller | Sampling rate (interval) | Can be saved to database?
Exec 3 or 4 | Exec 3-style standard | 60 | 1 per function block | 1 to 255 minutes | Yes
Exec 3 or 4 | Exec 3-style standard | 30 | 2 per function block | 1 to 255 minutes | Yes
Exec 3 or 4 | Exec 3-style with extended | 60 | 1 extra per controller (module driver) | 1 to 255 minutes | Yes
Exec 3 or 4 | Exec 3-style with extended | 30 | 2 extra per controller (module driver) | 1 to 255 minutes | Yes
Exec 3 | Exec 3-style with enhanced using XF2 function blocks | 288 | limited by available memory | 1 to 255 seconds or minutes | No
Exec 4 | New-style | 288 | 50 per controller (limited by available memory) | 1 to 255 seconds or minutes | Yes
Exec 6 | New-style | 288 | limited by available memory | 1 to 255 seconds or minutes | Yes
NOTE T-Line and U-Line controllers are used for low-end, high-volume terminal control applications so they are not suited for time-critical applications (including very short trend intervals). Trend intervals on T-Line and U-Line function blocks should be set to one minute or greater.
In This Section Trends and controller memory Trends for Exec 4 and 6 controllers Trends for Exec 3 and 4 controllers Historical trend reporting logic