Three windows cover most of a session: the capture with its fitted model, the computed gains with their margins, and the write-back dialog that puts the numbers into the controller. Drawn here from a real run on a flow loop; your plant data goes in the same places.
Capture window. The PV trace (dark) against the setpoint step (amber); the fitted K, T and L and the residual appear the moment the step settles. A residual over the threshold is called out so you do not tune a bad fit.Gains panel. The chosen rule on the left, the resulting gains in the controller's convention, and on the right the gain and phase margin checked against your target with a plain tick or cross.Write-back. Flintloop maps each gain to a register or node, shows exactly what it will send, and reads the value back after writing so a silent failure cannot hide.