Hi German,

You can use the GetAnalogTrendDataMessage to obtain trend data with a specified time range:

Disclaimer: 

“Note that this is an internal call, and we do not recommend using this, as it is not officially supported, and we cannot guarantee that it will still work in the future. As a rule, you should avoid using SLNet calls, as these are subject to change without notice. We recommend using instead always the correct UI or automation options provided in DataMiner Automation or through our web API.”