Canon Speedlite 600EX-RT Mode D'emploi page 74

Linked Shooting with Radio Transmission
72
Set all the Speedlites.
5
Repeat steps 1 to 4 and set all the
Speedlites to "Master unit" or "Slave
unit" in the linked shooting mode.
Set the transmitters used in linked
shooting in the same way.
When pressing the <I> button to
change the setting of a unit from
"Slave unit" to "Master unit", the other
Speedlites (or transmitters) that were
set as "Master unit" until then
automatically switch to "Slave unit".
Set up the slave unit cameras.
6
Check that the <D> lamp of the
slave unit is lit in green.
Set up all the slave unit cameras
within approximately 30 m/98.4 ft. of
the master unit camera.
Take the picture.
7
Check that the <D> lamp of the
master unit is lit in green and take the
picture.
The slave unit cameras are released
in coordination with the master unit
camera.
After shooting with linked shooting,
the <D> lamp of the slave unit is
briefly lit in orange.