User`s guide

Data Storage Configuration
Storage Data Types
184 UMC800 Control Builder User’s Guide Release E
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Storage Data Types
Trends
Two Trend groups of up to 12 points each can be stored. Floppy disk capacity for trends is inversely
proportional to the number of trend points and the storage time interval (that is, the time between trend
samples). For example, when storing 2 trend groups of 12 points each at a storage interval of 2 seconds,
the floppy disk will be filled in a few hours. Conversely, when storing 1 trend group of 3 points at a
storage interval of 30 minutes, the floppy disk could take several months to be filled.
Point log (unit data samples)
A point log file to take a “snapshot” of process data for up to 12 points is also provided. Point log samples
can be scheduled to occur at a user-specified time synchronized to the controller’s Real Time Clock (RTC)
or by a digital event in the controller. The maximum sample rate for point log data is 60 seconds per
sample. The Point log file has a maximum capacity of 2000 records per file.
Alarms
Alarm recording is available to store up to 150 on and off alarm actions. Alarm data includes the point tag,
a 16-character point description, and the time and date of alarm occurrence.
Digital events
Digital event recording is also available to store up to 150 on and off transitions of digital events in the
controller. Event data includes the point tag, a 16-character point description, and the time and date of
event occurrence.
What cannot be stored
Setpoint Programs/Schedules, instrument configurations, recipes, variables, diagnostics, and calibrations
are not part of the Data Storage feature.