To change how often the data loaders collect data, change the frequency of data collection per loader.
For EGO data loaders, edit EGO_TOP/perf/conf/plc/plc_ego.xml.
For Symphony data loaders, edit EGO_TOP/perf/conf/plc/plc_soam.xml.
<DataLoader Name="egodynamicresloader" Interval="300" ... />
<DataLoader Name="egodynamicresloader" Interval="200" ... />