WAGO-I/O-SYSTEM 750
Function Description
71
750-806 Fieldbus Controller DeviceNet
TM
Manual
Version 2.0.0
7.3
Data Exchange
Objects are used for exchange of process data for the DeviceNet
TM
- fieldbus
controller.
For access from the network to the individual objects, connections between the
required subscribes must first be established and connection objects set up or
activated.
The fieldbus controller can be addressed from the “Unconnected Message
Manager Port” (UCMM port).
The UCMM port allows dynamic connections via one or more connections from
one or more clients.
The “Assembly Object” specifies the structure of the objects for data
transmission. With the “Assembly Object”, I/O data can be combined into blocks,
for example, and sent via a single message connection. Creating blocks requires
less traffic on the network.
There is a distinction between input and output assemblies. An input assembly
reads in data from the application via network or produces data on the network.
An output assembly writes data to the application or pulls data from the network.
In the fieldbus controller, various assembly instances are pre-programmed (static
assembly).
Additional Information
The assembly instances for static assembly are described in the section “Fieldbus
Communication” > … > “Process Data and Diagnostic Status” > “Assembly
Instances.”
The dynamic assembly can also be used from the static assembly at the fieldbus
controller. In the dynamic assembly, assembly instances can be created in which
process data can be compiled from various application objects as required.
Additional Information
Information on the dynamic assembly is available in section “Programming PFC
with WAGO-I/O-
PRO”
> “Special DeviceNet
TM
Characteristics of the Fieldbus
Controller” > “Dynamic Assembly”.
