Arithmetic instructions
451
Part III FP Instructions
F270_MAX
Maximum value search in 16-bit data table
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.
PLC types
Availability of F270_MAX (see page 1323)
Variable Data type Function
s1 starting area of data table
s2
ANY16
ending area of data table
max INT specifies maximum value
pos INT position where maximum value was found
For Relay T/C Register Const.
s1, s2 WX WY WR WL SV EV DT LD FL -
max, pos - WY WR WL SV EV DT LD FL -
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 >
s2.
the address areas of s1 and s2 are
different.
Description
The function searches for the maximum value and its position in a 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.
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.
To Next Page
Loading...
Need help?
General
