Selection instructions
255
Part II IEC Instructions
MIN
Minimum value
To add an enable input and enable output to the instruction, select [With EN/ENO] from the
"Instructions" pane (LD, FBD or IL editor). To reuse an instruction select "Recently used" from the
context menu or press <Ctrl>+<Shift>+<v> in the programming window.
PLC types
Availability of MIN (see page 1328)
The number of input contacts lies in the range of 2 to 28.
Data type I/O Function
all except
STRING
1st input value 1
all except
STRING
2nd input value 2
all except
STRING
output as input result, whichever input variable's value is smallest
In this example the input variables (value_1 and value_2) have been declared. Instead, you may
enter a constant directly at the input contact of a function.
Description
MIN detects the input variable with the lowest value.
Data types
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
Value_1 and value_2 are compared with each other. The lower value of the two is written into
minimum_value.
LD
ST
When programming with structured text, enter the following:
minimum_value:=MIN(value_1, value_2);