RAND (random value)

The RAND instruction calculates random integer values from a defined range.
Languages supported: Function block diagram, ladder diagram, structured text.
This instruction applies to the Micro810, L20E, L50E, and L70E controllers.
RAND
RAND
RAND parameters
Parameter
Parameter Type
Data Type
Description
EN
Input
BOOL
When set to true, the instruction is enabled.
  • TRUE: Execute the current computation.
  • FALSE: There is no computation.
Applies to ladder diagram programs.
base
Input
DINT
Defines the supported set of numbers.
RAND
Output
DINT
Random value in set [0..base-1].
ENO
Output
BOOL
Enables output. Applies to ladder diagram programs.

RAND examples

RAND function block diagram example
RAND function block diagram example
RAND ladder diagram example
RAND ladder diagram example
RAND structured text example
RAND structured text example
(* ST Equivalence: *)
selected := MUX4 ( RAND (4), 1, 4, 8, 16 );
(*
random selection of 1 of 4 pre-defined values
the value issued of RAND call is in set [0..3],
so 'selected' issued from MUX4, will get 'randomly' the value
1 if 0 is issued from RAND,
or 4 if 1 is issued from RAND,
or 8 if 2 is issued from RAND,
or 16 if 3 is issued from RAND,
*)
Results
Results
Provide Feedback
Have questions or feedback about this documentation? Please submit your feedback here.
Normal