Canon 5246B002 Instruction Manual page 36

Wireless Flash ShootingN
To perform wireless flash shooting, the camera or the Speedlite
attached to the camera must have a master function. The 320EX fires
as a slave flash when controlled from a master unit. For the detailed
shooting method, refer to the instruction manual of the camera or the
Speedlite with a master function.
34
Set the camera or Speedlite as
1
the master unit.
Refer to the instruction manual of the
camera or Speedlite.
Set the 320EX as the slave unit.
2
Set the power switch of the 320EX to
<SLAVE>.
Set the transmission channel.
3
Set the transmission channel on the
master unit.
Set the 320EX to the same
transmission channel as the master
unit.
Set [Firing group].
4
Set the firing group to match the
shooting purpose of the master unit.