This article explains how to set the polling rate less than 1 second for Modbus TCP in Aveva Edge SITUATION:
This example is tested in Aveva Edge 2020 R2.ACTION:
This can be achieved by setting up a Standard Driver Sheet and configure a tag to its Read Trigger & Write Trigger to control the polling rate.
And this tag can be associated to a scheduler function to determine the polling rate value.
Example is shown below.