My companion died today. How long before I can cast 630? Will it's affinity to my charcter be damaged?

I seem to recall it being 24 hours before your companion recovers from a death.

Keith/Brinret/Shiun

Brinret says, "Bring it on."
A bolt of lightning streaks down from the sky and strikes Brinret!
... 16428101 points of damage!
Powerful blast reduces Brinret to a smoldering pile of ash!