DataTimeout - property of the PmgTrendViewer object
Maximum time to wait for data (in seconds), that are asked by individual tvTrend
objects (only objects connected to any server - to the data source).
Property access for read and write
The default value is 20 seconds.
var oTView = pMe.Items("../TrendView");
var nTimeout = oTView.DataTimeout; //reading
oTView.DataTimeout = 25; //writing