Chapter 13 Data manipulation instructions
298 Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
AVERAGE stores a value at each cycle and calculates the average value of all
already stored values. Only the N last values are stored.
Average function block operation
• The number of samples (N) cannot exceed 128.
• If the RUN command is FALSE (reset mode), the output value is equal to
the input value.
• When the maximum number of stored values is reached, the first stored
value is erased by the last one.
Arguments
Parameter Parameter type Data type Description
RUN Input BOOL TRUE = run/FALSE = reset.
XIN Input REAL Any real variable.
N Input DINT Application defined number of samples.
XOUT Output REAL Running average of XIN value.
ENO Output BOOL Enable out.
Applies only to LD programs.
Tip: Using floating-point data types could result in inaccurate calculations due to the rounding limitations inherent in floating-point mathematics.
Tip: When setting or changing the value for N, you need to set RUN to FALSE, then set it back to TRUE.
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