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F270_MAX
The function searches for the maximum value and its position in a 16-bit data table.
Description
Input s1 specifies the starting area of the data table, and s2 specifies the end. The maximum value
is returned at output max and its position at output pos.
The position pos is relative to the position at the beginning of the data table to the first occurrence
of the maximum value.
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.
Availability of F270_MAX (see page 1323)
PLC types
Data types
Variable
Data type
s1
ANY16
s2
INT
max
INT
pos
Operands
For
s1, s2
max, pos
Error flags
No.
IEC address
%MX0.900.7
R9007
%MX0.900.8
R9008
In this example, the same POU header is used for all programming languages. For an example
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.
Body
When the variable start is set to TRUE, the function is carried out. It searches for the maximum
value and its position in the data_field. The result is here: maximum_value = 6 and position = 2.
Maximum value search in 16-bit data table
Function
starting area of data table
ending area of data table
specifies maximum value
position where maximum value was found
Relay
WX
WY
WR
WL
-
WY
WR
WL
Set
permanently
for an instant
T/C
Register
SV
EV
DT
LD
SV
EV
DT
LD
If
the address of the variable at input s1 >
s2.
the address areas of s1 and s2 are
different.
Arithmetic instructions
Const.
FL
-
FL
-
451
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