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Device Object Description
This section describes in further detail each of the Device Objects in the Object/Property
Support Matrix and a brief description of each object associated with each Device Object
type.
System Controller
The System Controller is the main Device Object for the system. It acts as a virtual
BACnet router for the other Device Objects populated on the Intelli-Hood system. The
System Controller Device Object has the following objects which reflect the status of I/O
on the System Controller hardware.
Digital Input Status
These three Binary Values reflect the state of the three physical Digital Inputs located on
the System Controller I/O board. These are dry contacts which can be used to command
the Intelli-Hood system to react to external input. If the digital input is inactive (“Open”),
then the physical digital input does not have a completed circuit between the referenced
digital input and ground. If the digital input is active (“Closed”), then the physical digital
input circuit has been completed and the digital input is commanding the system. The
following is the list of possible digital input configurations and how they affect the Intelli-
Hood system.
Remote On/Off
A Remote On/Off digital input is an edge sensitive input. When the digital input changes
state from inactive to active, it requests that the fans in the associated Hood Groups turn
on. When the digital input changes state from active to inactive, it requests that the fans
in the associated Hood Groups turn off. Since a Remote On/Off digital input is edge
sensitive, multiple digital inputs (i.e., toggle switches on either end of a kitchen) can be
used to turn on and off the same set of fans. Also note that the Remote On/Off command
will be ignored if the Hood Group is disabled or in High Temperature Alarm.
Remote Enable/Disable
A Remote Enable/Disable input is a level sensitive input. When the digital input is
inactive, the associated Hood Groups are disabled and the fans will not turn on unless a
High Temperature Alarm has been reached. When the digital input is active, the
associated Hood Groups are enabled and fans can be turned on or off. If there are
multiple Remote Enable/Disable digital inputs associated with a Hood Group, all digital
inputs need to be active before the fans are allowed to turn on. Note that the Remote
Enable/Disable input does not turn any fans on itself.
