WAGO 750-830 Manual page 194

194 • Fieldbus Communication
BACnet/IP
Object
20 Multi-State Value
21 Notification Class
22 Program
23 Pulse Converter
24 Schedule
25 Trend Log
4.2.1.2.2 Properties
Objects are described by specific properties with their values. In this manner,
object information, such as name, status and behavior of the object in question
can be read.
The following three properties are common to all objects:
• Object_Identifier
• Object_Name
• Object_Type
Other properties are object-specific. Currently, there are over 150 different
properties (BACnet Standard 135-2004).
The values of the properties are visible and readable (R) throughout the entire
BACnet network. Some are also writable (W) by remote BACnet devices, de-
pending on property and configuration.
Object properties are accessed through services.
Function
Multi-level value, delivers logical states of the
object
Notification class, assigns alarm and event re-
ports to times and recipients
Program, used to access programs in the BACnet
device
Impulse entry, counts quantities for control and
monitoring
Schedule, for establishing certain actions at pre-
defined times
Trend log of properties of certain criteria, either
cyclic or after value changes (COV)
WAGO-I/O-SYSTEM 750
BACnet/IP Controller