Can you elaborate on your circuit/amplifier design? I might suggest you read the How PLECS Works chapter of our User Manual. Basically, after the setup of the physical model, PLECS determines the execution order of the block diagram where the physical model is treated as a single atomic subsystem of the block diagram. But any results the user wants to monitor in a Scope, Display block, etc are presented simultaneously. Further, the Op-Amp component, for example, is nothing more than an ideal gain under the mask. Therefore, it isn't possible to measure a time delay based on the native implementation of your circuit.