Arithmetic instructions
463
Part III FP Instructions
F275_MEAN
Total and mean numbers calculation in 16-bit data table
Input s1_Start specifies the starting area of the data table, and s2_End specifies the end. The sum
of all elements in the data table is returned at output Sum and the arithmetic mean of all elements
in the data table is returned at output Mean. The arithmetic mean is rounded off if it is not a whole
number.
This instruction also exists as a P instruction (for FP2/2SH, FP3/5, FP10/10SH PLC types), which
is only executed at the rising edge of the EN trigger. Select [Insert P instruction] from the
"Instructions" pane if you require a P instruction. To facilitate reuse, the instruction then appears
under "Recently used" in the pop-up menu. Press <Ctrl>+<Shift>+<v> within the programming
area to open the list of recently used elements.
PLC types Availability of F275_MEAN (see page 1323)
Variable Data type Function
s1_Start starting area of data table
s2_End
ANY16
ending area of data table
Mean INT mean of all elements in data table area specified
Sum DINT sum of all elements in data table area specified
For Relay T/C Register Const.
s1_Start,
s2_End
WX WY WR WL SV EV DT LD FL -
Mean - WY WR WL SV EV DT LD FL -
Sum - DWY DWR DWL DSV DEV DDT DLD DFL -
No. IEC address Set If
R9007 %MX0.900.7 permanently
R9008 %MX0.900.8 for an instant
the address of the variable at input
s1_Start > s2_End.
the address areas are different.
R9009 %MX0.900.9 for an instant the total value range overflows or
underflows the 16-bit range.
Description
This function calculates the sum and the arithmetic mean of numbers (both with +/- signs) in the
specified 16-bit data table.
Data types
Operands
Error flags
Example
In this example, the same POU header is used for all programming languages. For an example
using IL (instruction list), please refer to the online help.
POU header
All input and output variables used for programming this function have been declared in the POU
header.
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