Technical data

276 • List of all BACnet Properties in Native Operation
Acked_Transitions
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
The difference between the properties "BACnetARRAY" and "List of" is that
the elements of a field can be individually accessed through a field index
while this is not possible for the elements of a "List of". Furthermore, the
number of elements of a "BACnetARRAY" can be determined by reading the
field index 0; the number of elements in a "List of" can only be determined by
reading the whole value of the property and conducting a count.
In the following list, the associated BACnet data type is indicated for each
property. Under "Object", all objects in which the respective property occurs
are listed. The description explains functions and interrelationships of the
properties in question. If the meanings of the properties are different for dif-
ferent objects, the explanations for these objects are given separately.
6.1 Acked_Transitions
Data Type BACnetEventTransitionBits
Object Binary Input, Binary Output, Analog Input, Analog
Output
Description This property of the type BACnetEventTransitionBits
transmits three flags that indicate the receipt of the confir-
mation for TO-OFFNORMAL, TO-FAULT and TO-
NORMAL events. In the context of the Analog Input ob-
jects, transitions the High_Limit and Low_Limit
Event_States are considered to be OFFNORMAL events.
The flags are deleted after the corresponding event has
taken place and set under the following conditions:
• upon receipt of the corresponding acknowledgment;
• upon the occurrence of the event if the correspond-
ing flag is not set in the Event_Enable property
(meaning event notifications will not be generated
for this condition and thus no acknowledgment is
expected);
• upon the occurrence of the event if the correspond-
ing flag is set in the Event_Enable property and the
corresponding flag in the Ack_Required property of
the Notification Class object implicitly referenced by
the Notification_Class property of this object is not
set (meaning no acknowledgment is expected).
This property is required if intrinsic reporting is sup-
ported by this object.