15 April 2021
This will not be possible with electronic switches.
As the PIR open state will remove power to Dimmer, and the electronic dimmer will default to off state when PIR switches, the dimming mech will need to be pressed every time the PIR closes.
However, achieving dimming circuit compatible with a PIR will be possible with a rotary dimmer (PDL354RDMUN-VW) in place of the electronic dimmer. This will have to be switched with rocker switches, but can be wired for multi-way switching.