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7 BACnet Communication
3-142
WindO/I-NV4 User’s Manual
Binary Output Object
Present_Value of the Binary Output object can be allocated to a bit device and set to the value of that bit device.
The following diagram illustrates the concept when a device address is allocated to Present_Value of the Binary
Output object and the BACnet device writes the state of the external output.
The following table shows Present_Value, Polarity, and the physical state of the output.
Present_Value Polarity Physical State of Output
INACTIVE NORMAL OFF or INACTIVE
ACTIVE NORMAL ON or ACTIVE
INACTIVE REVERSE ON or ACTIVE
ACTIVE REVERSE OFF or INACTIVE
BACnet objects
BACnet device
Device addresses Physical output
Binary Output
object
Present_Value:
0
Priority_Array
#Q0030: 0
External output:
OFF
Reflected
OUT 0: OFF
Write value:
0
Priority:
2
MICRO/I Digital output module
Write from BACnet device Read out to device address