List of all BACnet Properties in Native Operation • 299
Present_Value
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
Tab. 6-7: Interrelationships for the Polarity property
Present_Value Polarity
Physical state of the
input or output
Physical state
of device
INACTIVE
NORMAL
OFF or INACTIVE
not running
ACTIVE
NORMAL
ON or ACTIVE
running
INACTIVE
REVERSE
ON or ACTIVE
not running
ACTIVE
REVERSE
OFF or INACTIVE
running
6.58 Present_Value
Data Type
see Objects
Objects
Calendar (BOOLEAN), Binary input (BACnetBinaryPV),
Binary output (BACnetBinaryPV), Analog input (REAL),
Analog output (REAL), Scheduler (Any)
Description Calendar:
This property, of the type BOOLEAN, indicates the current
value of the calendar: TRUE if the current date is in the
Date_List and FALSE if it is not.
Binary Input:
For this object, the property Present_Value of the type
BACnetBinaryPV indicates the logical state of the Binary
Input. The logical state of the input is either INACTIVE or
ACTIVE. The relationship between the Present_Value and
the physical state of the input is determined by the Polarity
property. Possible states are summarized in Tab. 6-8.
Tab. 6-8: Interrelationships for the Polarity property (Binary Input)
Present_Value Polarity
Physical state of
the input
Physical state of
device
INACTIVE
NORMAL OFF or INACTIVE Not in operation
ACTIVE NORMAL
ON
or
ACTIVE In
operation
INACTIVE
REVERSE ON or ACTIVE
Not in operation
ACTIVE
REVERSE OFF or INACTIVE In operation
The Present_Value property shall be writable when
Out_Of_Service is TRUE.
