List of all BACnet Properties in Native Operation • 277
Active_COV_Subscriptions
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
6.2 Active_COV_Subscriptions
Data Type
List of BACnetCOVSubscription
Object
Device
Description
The Active_COV_Subscriptions property is a List of
BACnetCOVSubscription, each of which consists of a Re-
cipient, a Monitored Property Reference, an Issue Con-
firmed Notifications flag, a Time Remaining value and an
optional COV Increment. This property provides a network-
visible indication of those COV subscriptions that are active
at any given time. Whenever a COV Subscription is created
with the SubscribeCOV or SubscribeCOVProperty service,
a new entry is added to the Active_COV_Subscriptions list.
Similarly, whenever a COV Subscription is terminated, the
corresponding entry is removed from the Ac-
tive_COV_Subscriptions list.
This property is required if the device supports execution of
either SubscribeCOV or SubscribeCOVProperty service.
6.3 Active_Text
Data Type
CharacterString
Object
Binary input, Binary output
Description
This property, of type CharacterString, characterizes the in-
tended effect of the ACTIVE state of the Present_Value
property from the human operator's viewpoint.
The content of this string is determined locally, but it is in-
tended to contain a description of the ACTIVE state that can
be read by the user.
Example for Binary Input:
For example, if the physical input is a switch contact, then
the Active_Text property might be assigned a value such as
"Fan 1 On". If either the Active_Text property or the Inac-
tive_Text property are present, then both of them shall be
present.
Example for Binary Output:
For example, if the physical output that ultimately controls
the device from the operator's point of view is a relay con-
tact that turns on a light, then the Active_Text property
might be assigned a value such as "Light On". If one of the
optional properties Inactive_Text or Active_Text is present,
then both of these properties should be present.
