what order does the ecu calculate boost? is pid before trims or after trims?

[cbDrift]

so if your base duty cycle is say 50

and if your wastegate duty trim against IAT is currently -10%

and if your current boost is less than the target boost

does the ecu take the base duty cycle - do the pid stuff and then apply the trims?

or does the ecu take the base duty cycle - apply the trims and then do the pid stuff?

[Adamw]

A PID control system applies its correction terms based purely on "target error".  For boost control the target error is "Boost target" - "Boost Source".

The feed-forward (Base duty cycle from wastegate DC% and wastegate trim tables) has no influence on the PID terms, these just determine the base DC value before closed loop correction is added.