BACnet_BO
The Binary Output object type (WinCC OA data point type) defines a standardized object whose properties represent the externally visible characteristics of a binary output. A "binary output" is a physical device or hardware output 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 output is to switch a particular piece of mechanical equipment, such as a fan or pump, on or off. The state ACTIVE corresponds to the situation when the equipment is on or running, and INACTIVE corresponds to the situation when the equipment is off or idle (Polarity = NORMAL).
In some applications, it may happen that these logical states are reversed on the application-level (Polarity = REVERSE).
Data point Type Name
BACnet_BO
(Object/)Data point Type Structure
DP_Name.property
| Data Point Element (Property) | Data Type | Device-depending availability | Description | ||||||||||
| Present_Value | unsigned integer | No |
This property reflects the logical state of the Binary Output. The logical state of the Input can be either INACTIVE or ACTIVE. The relationship between the Present_Value and the physical state of the Output is determined by the Polarity property. The possible states are summarized as follows:
PV = Present_Value P = Polarity PSoI = Physical State of Input PSoD = Physical State of Device A = ACTIVE I = INACTIVE N = NORMAL R = REVERSE |
Faceplate
The state of Present_Value that is shown in the faceplate has the following meaning: green = ACTIVE (1) and gray = INACTIVE (0). When the hand mode is activated, the present state can be changed directly in the faceplate. For more details, see Value Input Panel.
Tabs
For more information on tabs, see Tabs.
Available Symbol Types
| Name | Usage | $ Parameter | Symbols |
| Simple_BO | State display in terms of color. Switching (e.g. switch command on/off, control command open/closed) | DP |
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| Lamp_1 | Light bulb (on/off) | DP |
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