Setting sampling and execution rate parameters

Model identification and validation depend on the availability of data at precise sampling points. Therefore, the test data (or data from an external file) must have accurate parameter settings which determine the data sampling. The following three parameters, accessible through the Control Studio and PredictPro applications, are used to determine the data sampling:

Data Sampling Rate (DSR): the block history sample rate configured in the Control Studio application. If you are using file data, this is the file data rate.
Module Execution Rate (MExec): the Module scan rate configured in the Control Studio application.
Time to Steady State (TSS): the process time to steady state configured in the PredictPro application.

Since PredictPro uses a horizon of 120 (120 sample points along the process TSS so that the block executes at the rate TSS/120 in seconds), the fundamental requirements, in mathematical form, for accurate data sampling are:

Equation 1: TSS = 120 x DSR x n
Equation 2: TSS = 120 x MExec x m (where m and n are integers )

Ideally, DSR = MExec x p (p is an integer) should also be satisfied.