jsonReadVariableList

This function block reads a list of variables and outputs their current values as a JSON object.

Function Block Interface

I/O	Parameter	Description	Data type	Default Value
IN	pVariableList	Address of the list of variables to read	UDINT (STRING*)
IN	pCache	Address of the cache variable to use	UDINT (jsonCache_typ*)
IN	BufferSize	Size of memory to allocate for internal data buffers	UDINT	100000
IN	MaxIterations	Maximum number of iterations to perform while processing	UDINT	10000
OUT	Status	Function block status. 0 = Successful read.	UINT
OUT	pJSONObject	Address of the JSON object containing the variable values	UDINT (STRING*)
OUT	JSONObjectLength	String length of the JSON object	UDINT

Protocol

VariableList: ["globalVar", "myTask:localVar"]

JSONObject: [
    {
      "globalVar": 25
    },
    {
      "myTask:localVar": {
        "elem1": "Hello",
        "elem2": 123.456
      }
    }
  ]