PWS is a function of the Weather Radar, not connected to RAs.
The reactive wind shear, on the other hand:
Originally Posted by FCOM DSC-22_40-40 "A": AUTO FLIGHT - FLIGHT AUGMENTATION Windshear Detection Function
The windshear detection function is provided by the Flight Augmentation Computer (FAC) in takeoff and approach phase in the following conditions:
- At takeoff, 3 s after liftoff, up to 1 300 ft RA
- At landing, from 1 300 ft RA to 50 ft RA
- With at least CONF 1 selected.
The warning consists of:
- A visual “WINDSHEAR” red message displayed on both PFDs for a minimum of 15 s.
- An aural synthetic voice announcing “WINDSHEAR” three times