Technical data

194 • Fieldbus Communication
BACnet/IP
WAGO-I/O-SYSTEM 750
BACnet/IP Controller
Object Function
20 Multi-State Value Multi-level value, delivers logical states of the
object
21 Notification Class Notification class, assigns alarm and event re-
ports to times and recipients
22 Program Program, used to access programs in the BACnet
device
23 Pulse Converter Impulse entry, counts quantities for control and
monitoring
24 Schedule Schedule, for establishing certain actions at pre-
defined times
25 Trend Log Trend log of properties of certain criteria, either
cyclic or after value changes (COV)
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.