Arithmetic instructions
455
Part III FP Instructions
F350_FMAX
Maximum value search in real number data table (floating point data)
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 address of the maximum value at output pos is relative to the beginning address in the data
table as specified at input s1.
If more than one maximum value is found, the first one found beginning from the starting address
specified at s1 is stored in d.
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 F350_FMAX (see page 1325)
Variable Data type Function
s1 REAL starting area of data table
s2 REAL ending area of data table
max REAL specifies maximum value
pos INT position where maximum value was found
For Relay T/C Register Const.
s1, s2 DWX DWY DWF DWL DSV DEV DDT DLD DFL -
max - DWY DWR DWL DSV DEV DDT DLD DFL -
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 addresses of variables at inputs s1 >
s2.
the address areas are different.
the floating point values exceed the
processing range.
Description
The function searches for the maximum value and its position in a floating point 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.
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