val = oOpcData.ItemEx(id).Value
oOpcData.ItemEx(id).Value = val
|id||(Variant) Specifies the variable. The value is: |
- Name (String, case sensitive text, for example "a1") or
- Index (Long, zero-based index)
|nAttr||[optional] (Long) It allows to change the behavior of the method.|
0 (default) - default behavior (as the Item method).
1 - when referencing the non-existent variable the global error in the INFO system won't be generated.
The PmVar object includes information about the variable (value, name, index, etc.).
This method enables access only to variables (with corresponding data extension) that are created directly in this object (own variables). In fact also other variables from PmaData objects are registered into this object - those that have corresponding data extension configured with path to this object. All data extensions registered in this object can be accessed by method GetVarExtensions.
var oItem = oOpcData.ItemEx("Temperature3", 1);