Skytec ST-1000 Mode D'emploi page 22

TIMER
Push the TIMER button (4) to activate the timer function. The set
interval time is displayed and counts towards 0. After that the
smoke machine will emit the set volume of smoke during the set
duration time, followed by a rest period. This sequence is
repeated automatically until you push the TIMER button (4) again
to switch off timer operation.
VOLUME
By pushing the VOLUME button (5), the units emits smoke of the
previously set volume (VOLUME Out). Push the button again to
switch this function off.
MANUAL
As long as you keep the MANUAL button (6) pressed, the machine
will emit smoke of 100% volume.
DMX Settings:
The smoke machines ST1500 and ST3000 both use two DMX
channels to control the functions. Every channel can be set between
0 and 255 (0 and 100%).
Thus you can run the smoke machine via a DMX control within a
program and control it remotely.