WAGO 750-830 Manual page 153

3.1.12.2.3 Binary Input Object
The Binary Input object defines a standardized object whose properties repre-
sent the externally visible characteristics of a binary input. A "binary input" is
a physical device or hardware input that can be in only one of two distinct
states. In this description, those states are referred to as ACTIVE and
INACTIVE. A typical use of a binary input is to indicate whether a particular
piece of mechanical equipment, such as a fan or pump, is running or idle. The
state ACTIVE corresponds to the situation when the equipment is on or run-
ning, and INACTIVE corresponds 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 when the relay is energized, while a normally
closed relay contact may result in an INACTIVE state when the relay is ener-
gized. The Binary Input object provides for this possibility by including a Po-
larity property.
The Binary Input Object and its properties are summarized in Tab. 3-30. The
properties are described in section 6.
Tab. 3-30: Properties of the Binary Input Object
Property
Object_Identifier
Object_Name
Object_Type
Present_Value
Description
Device_Type
Status_Flags
Event_State
Reliability
Out_Of_Service
Polarity
Inactive_Text
Active_Text
Change_Of_State_Time
Change_Of_State_Count
Time_Of_State_Count_Reset
Elapsed_Active_Time
Time_Of_Active_Time_Reset
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
BACnet/IP Controller 750-830
BACnet Building Controller (B-BC)
Data type:
BACnetObjectIdentifier
CharacterString
BACnetObjectType
BACnetBinaryPV
CharacterString
CharacterString
BACnetStatusFlags
BACnetEventState
BACnetReliability
BOOLEAN
BACnetPolarity
CharacterString
CharacterString
BACnetDateTime
Unsigned
BACnetDateTime
Unsigned32
BACnetDateTime
Default Value Writable via BACnet by
means of
- -
Binary_Input_X -
BINARY_INPUT -
- -
*see footnote WriteProperty
' ' WriteProperty
'000' -
State_Normal (0) -
0 WriteProperty
'0' -
0 WriteProperty
"inactive" WriteProperty
"active" WriteProperty
UNSPECIFIED -
0 -
UNSPECIFIED -
0 -
UNSPECIFIED -
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