Offline, Idle, Loading – AEC VacTrac Series Conveying Systems User Manual
Page 39: 2 operation states, Startup)
Page 38
12-Station Controllers
VacTrac™ Conveying Systems
6-2 Operation States
OFFLINE
The
OFFLINE
operation state is the default state at the point
when you apply power to the controller. While in this state, all
outputs in the system are deactivated and access to the menu
system is permitted. All station demands are ignored.
IDLE
(Startup)
If you press the
START/STOP
key in the
OFFLINE
state, the
controller enters the
IDLE
(Startup) state. If no demand is on the
system, the controller immediately enters the
READY
state. With a
valid demand, the
IDLE
(Startup) state allows the pump to get up
to speed before starting to load a station.
While in the
IDLE
(Startup) state, all station sequence valves are
closed and the vent valve is open. The vent valve allows the
vacuum pump to vent to atmosphere, keeping the system from
becoming depressurized.
LOADING
Following the
IDLE
(Startup) state, the vent valve is closed and
the first station in demand loads when that station sequence valve
opens. This is the
LOADING
state. You can define load times for
each station. The controller loads the station in demand until one of
two events occur:
• The volume fill sensor becomes active.
- or -
• The load time is exhausted.
At the end of the
LOADING
cycle, the controller closes the
sequence valve and continues to the next station in the queue. If all
stations are satisfied, the controller enters the
IDLE
(No Activity)
state.