Reading all values of the data group (defined on the "Data
" tab) from the OPC server.
Boolean Refresh(Long Attr)
true - on success
false - on error
The method always reads all data. If it is requested to read only the specific data (into the "Data
" tab), then the Read
method can be used. The Refresh
method is the asynchronous operation (see OPC DA Basic terms
method needn't be called
if the "Update from server at server change
" configurator is checked (on the "Parameters
" tab) because the data are then "read" automatically.
var oOpcGroup = pMe.Pm("/OpcClient/Group1");