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Programming Function Blocks and Features
Video Recorder – User Manual 139
Rolling Average
Outputs a rolling mean average CVn OV of the input over the specified Average Period. As new input
samples are collected, old samples are discarded. The function will calculate a new average at equally
spaced sample intervals.
Sample interval =
averaging period
# of samples
Rolling Average =
sum of samples
# of samples
Example
# of samples = 10
Average Period = 30 minutes
The first average will appear after 30 minutes, then will be updated every 30/10 or 3 minutes after.
When the Reset Input is ON(1) all accumulated samples are discarded and the output is held until the
Reset Input is OFF(0), then the averaging period resets.
Table 4-46 describes the Rolling Average prompts. See Table 4-2 for additional prompts.
Table 4-46 Rolling Average Prompts
Prompt Range/Selections Definition
RANGE LOW
RANGE HIGH
OFF or number Enter the output’s display limits. Output is not clamped or
flashed when it exceeds these limits.
INPUT OFF, analog parameter,
number
This parameter will be averaged.
RESET OFF, discrete parameter, 0, 1 Resets average.
# OF SAMPLES 1-60 Number of samples taken during average period.
AVG PERIOD MINS OFF or number Number of minutes in average period.