Siemens SIMATIC S7-1200

Basic instructions
8.5 Math functions
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
261
8.5.7
MIN (Get minimum) and MAX (Get maximum)
Table 8- 59 MIN (get minimum) and MAX (get maximum) instructions
LAD / FBD
SCL
Description
out:= MIN(
in1:=_variant_in_,
in2:=_variant_in_
[,...in32]);
The MIN instruction compares the value of two parameters IN1
and IN2 and assigns the minimum (lesser) value to parameter
OUT.
out:= MAX(
in1:=_variant_in_,
in2:=_variant_in_
[,...in32]);
The MAX instruction compares the value of two parameters IN1
and IN2 and assigns the maximum (greater) value to parameter
OUT.
1
For LAD and FBD: Click the "???" and select a data type from the drop-down menu.
Table 8- 60 Data types for the parameters
Parameter
Data type
1
Description
IN1, IN2
[...IN32]
SInt, Int, DInt, USInt, UInt, UDInt, Real, LReal, Time,
Date, TOD, Constant
Math operation inputs (up to 32 inputs)
OUT SInt, Int, DInt, USInt, UInt, UDInt, Real, LReal, Time,
Date, TOD
Math operation output
1
The IN1, IN2, and OUT parameters must be the same data type.
To add an input, click the "Create"
icon or right-click on an input stub for one of
the existing IN parameters and select the "Insert input" command.
To remove an input, right-click on an input stub for one of the existing IN parameters (when
there are more than the original two inputs) and select the "Delete" command.
Table 8- 61 ENO status
ENO
Description
1
No error
0 For Real data type only:
• At least one input is not a real number (NaN).
• The resulting OUT is +/- INF (infinity).