Hello,
The properties of the elements in INTERCONNECT are fixed over the course of a time-domain simulation, so you can't change them part of the way through the simulation. The only element parameters that change would be those that depend on the values of the input signals, for example the effective index of a modulator, which depends on the input electrical signal. One possible method to make a property that changes over time might be to use a Scripted Element, but this is an advanced feature that may require a lot of development time by the user.
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