b = oData.ReadFromSocketEx(nType, nSubType, nFrom, nCount)
|nType||(Integer) Subtype of the data protocol|
|nSubType||(Integer) Version of the data protocol subtype|
|nFrom||(Long) Index (zero-based index) of the variable in the object from which (including) the data are received|
|nCount||(Long) Number of variables in the object that are received|
It enables the user to specify the subtype of the data protocol by which will communicate it with the server and for example the value and number of values of the PmData object from which the data received from the network will be written into the object. The exact meaning of the nFrom and nCount parameters can depend on the nType and nSubType parameters.
Supported subtypes of the protocol:
|0||0||protocol for the transfer of the whole PmData object. Parameters nFrom and nCount are ignored.|
|1||1||this enables to enter by the nFrom and nCount parameters from which value and how many values of the object have to be received.|
The method only activates the data transfer but there is no assurance that data are already transferred after ending this method. The data transfer termination is announced by the onEndOfTransfer event.
Calling this method is meaningful only if the Sockets page is configured as the Socket client.
Variables on the Data page of this object are filled up by the incoming data.