al
drum_vacuum_on
dvo
ThermoFlex
state al dvo is set to 1 whenever the drumvacuum system is turned on, likewise it is
set to 0 when the drum vacuum system is turned off. This parameter exists to aid in
the decision of whether or not to turn the drum vacuum on after a reset - ie. if the
machine was to reset/crash for some reason, if this parameter is 1 then the drum
vacuum will startup at reset to provide vacuum to any plate that may still be on the
drum.
Setting or clearing this flag will have no effect other than to possibly cause an
unexpected state of the drum vacuum system after a reset.
uint8