Comparison instructions
614
Part III FP Instructions
F346_FWIN
Floating point data band compare
Flags
Comparison between
s1, s2 and s3
R900A (>flag) R900B
(=flag)
R900C (<flag)
s1_In < s2_Min Off Off On
s2_Min s1_In
s3_Max
Off On Off
s1_In > s3 On Off Off
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 F346_FWIN (see page 1324)
Variable Data type Function
s1_In REAL number data to be compared to s2_Min and s3_Max
s2_Min lower limit
s3_Max
REAL
upper limit
For Relay T/C Register Constant
s1, s2, s3 DWX DWY DWR DWL DSV DEV DDT DLD DFL dec. or hex.
No. IEC address Set If
R9007 %MX0.900.7 permanently
R9008 %MX0.900.8 for an instant
the values at inputs s1_In, s2_Min, and
s3_Max are not REAL numbers
if the value at s2_Min > s3_Max.
Description
The function compares a data band whose upper and lower limits are specified at inputs s2_Min
and s3_Max with a value that is entered at input s1_In. The result is returned as follows:
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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