sosDoubleCreate (Function)

sosDoubleCreate will create a new DOUBLE object.

If the object already exists, it will be replaced.

Input:

key : STRING

The key for the object to create. May only contain a-z,A-Z,0-9, "." and "_" (maximum of 250 characters).

desc : STRING

The description for the object, to show in the IDE (maximum of 80 characters).

value : DOUBLE default 0

The initial value for the object. The value is not validated, making it possible to use it to e.g. determine unmodified values.

min_val : DOUBLE default 0

The minimum allowed value for the object. If both min_val and max_val are 0, there will be no limit. NaN is not a valid value for this parameter.

max_val : DOUBLE default 0

The maximum allowed value for the object. If both min_val and max_val are 0, there will be no limit. NaN is not a valid value for this parameter.

Returns: INT

Declaration:

FUNCTION sosDoubleCreate : INT;
VAR_INPUT
  key     : STRING;
  desc    : STRING;
  value   : DOUBLE := 0.0;
  min_val : DOUBLE := 0.0;
  max_val : DOUBLE := 0.0;
END_VAR;

Example:

INCLUDE rtcu.inc
INCLUDE math.inc
 
PROGRAM test;
VAR
  rc   : INT;
  temp : DOUBLE;
END_VAR;
BEGIN
  ...
  // Create double object
  rc := sosDoubleCreate(key := "config.max_temperature", value:=24.5, desc := "Largest temperature measured");
  DebugFmt(message:="sosDoubleCreate=\1", v1:=rc);
  // Update double object
  rc:= sosDoubleSet(key:="config.max_temperature", value:=26.7);
  DebugFmt(message:="sosDoubleSet=\1", v1:=rc);
 
  // Read double object
  rc:= sosDoubleGet(key:="config.max_temperature", value:=temp);
  DebugFmt(message:="sosDoubleGet=\1 => " + doubleToStr(v:=temp), v1:=rc);
  ...
END;
 
END_PROGRAM;