_dp_fct

"_dp_fct.._delay" attribute

If the attribute _dp_fct.._delay is not set when configuring a dp function, a default value of 5 seconds is used.

Constants for the ".._type" attribute

The following integer constants assign, to a datapoint, a config to mathematically link with other datapoint elements (see dpSet()).

"_dp_fct.._param" attribute

parameter list for datapoint function. Contains statistical attributes to be monitored.

"_dp_fct.._fct" attribute

definition of datapoint function.

"_dp_fct.._global" attribute

The dp_fct..global attribute defines global variables and their initialization value. The initialization runs when there are changes in the config or when starting. Logical uses of these global variables are determined by CTRL library functions and by transferring the global variables as reference parameters.

"_dp_fct.._stat_type" attribute

This attribute controls the statistical functions accompanying the DP function. The time parameters define the calculation times. Global variables can also be used here.

Example

Applies a config with parameter settings for a DP function (DPE link). It calculates the function (p1+p2)*p3 on the DPE "TestDP_1.element", p1="ExampleDP_Arg1.", p2="ExampleDP_Arg2.", p3="TestDP_2.element":

main()
{
  string p1, p2, p3;
  dyn_string ds;
  p1="ExampleDP_Arg1.:_original.._value";
  p2="ExampleDP_Arg2.:_original.._value";
  p3="TestDP_2.element:_original.._value";
  ds=makeDynString(p1, p2, p3);
  dpSetWait("TestDP_1.element:_dp_fct.._type",
  DPCONFIG_DP_FUNCTION,
  "TestDP_1.element:_dp_fct.._param",
  ds,
  "TestDP_1.element:_dp_fct.._fct",
  "(p1+p2)*p3");
}

For more details on the config "_dp_fct" see chapter Module PARA - dp_fct (DP function).