WAGO 750-830 Manual page 202

202 • Fieldbus Communication
BACnet/IP
4.2.1.2.4 Interoperability Area (IA)
The requirements for the overall operability of the system are divided into 5
areas. These areas establish functions for sub-areas of the requirements and
serve as the basis for the evaluation of interoperability. They are called Inter-
operability Areas (IA).
4.2.1.2.4.1 Data Sharing (DS)
For the system-wide, joint processing of data items, e.g. sensor information,
target value and parameter changes, facility operation, etc., an agreement on
data sharing is necessary.
Communication can be possible in both directions, both reading and writing.
Two (2) types of communication are supported.
• Reading and writing through requests and tasks
• Event-oriented data transmission using COV/COS (Change of Value/State)
Example: DS-RP-A Data Sharing-ReadProperty-A
4.2.1.2.4.2 Alarm and Event Notification (AE)
Alarm and event processes are used to create and send notifications to certain
recipients. Alarm confirmations are also managed and organized.
Whether an operation or alarm notification is to be generated can be optionally
established through the object property "Notify_Type". This is necessary if in-
trinsic reporting is supported by the object.
An event can trigger special actions, represent a state that triggers an alarm,
request a confirmation through an operator or just be registered/logged.
Two mechanisms for creating a notification are defined.
• Intrinsic Reporting
• Rule-based notification (arithmetic change reporting)
The Client (A) makes the request to read a value (RP),
to the Server (B).
Relies on events internal to the object that are responsible for monitoring
events and alarms.
WAGO-I/O-SYSTEM 750
BACnet/IP Controller