BACnet/IP Controller 750-830 • 155
BACnet Building Controller (B-BC)
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
3.1.12.2.4 Binary Output Object
The Binary Output object defines a standardized object whose properties rep-
resent the externally visible characteristics of a binary output. A "binary out-
put" is a physical device or hardware output that can be in only one of two dis-
tinct states. In this description, those states are referred to as ACTIVE and
INACTIVE. A typical use for a Binary Output is the switching of a mechani-
cal device, for example a ventilator or a pump. The state ACTIVE corresponds
to the situation when the equipment is on or running, and INACTIVE corre-
sponds to the situation when the equipment is off or idle.
In some applications, electronic circuits may reverse the relationship between
the application-level logical states ACTIVE and INACTIVE and the physical
state of the underlying hardware. For example, a normally open relay contact
may result in an ACTIVE state (device energized) when the relay is energized,
while a normally closed relay contact may result in an ACTIVE state (device
energized) when the relay is not energized. The Binary Output Object pro-
vides for this possibility by including a Polarity property.
The Binary Output Object and its properties are summarized in Tab. 3-31. The
properties are described in section
.
Tab. 3-31: Properties of the Binary Output Object
Property
Data type:
Default Value
Writable via BACnet
by means of
BACnetObjectIdentifier
-
-
CharacterString
Binary_Output_X
-
BINARY_OUTPUT
-
BACnetBinaryPV
-
-
CharacterString
*see
footnote
WriteProperty
'
' WriteProperty
'000' -
BACnetEventState
State_Normal (0)
-
0 WriteProperty
BOOLEAN '0'
-
BACnetPolarity
0
WriteProperty
"inactive"
WriteProperty
CharacterString
"active"
WriteProperty
UNSPECIFIED -
Unsigned
0
-
BACnetDateTime
UNSPECIFIED
-
Unsigned32
0
-
UNSPECIFIED
-
Unsigned32
1
WriteProperty
Содержание 750-830
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