Data Exchange - WAGO 750-306 Technical Description

3.2.5 Data Exchange

With DeviceNet, the transmission and exchange of data is made using objects.
For a network access on the single objects, it is necessary to create a connec-
tion between the desired participants and to allocate connection objects.
The DeviceNet fieldbus Controller 750-806 can communicate via the UCMM-
Port (Unconnected Message Manager Port).
The UCMM-Port permits a dynamic connection via one or several connections
from one or more clients.
The object configuration for the data transmission is defined by the Assembly
Object. The Assembly Object can be used to group data (e.g.: I/O data) to
form blocks (mapping) and send this data via one single communication con-
nection. This mapping results in a reduced number of accesses to the network.
A differentiation is made between input and output assemblies.
An Input Assembly reads data from the application via the network or pro-
duces data on the network respectively.
An Output Assembly writes data to the application or consumes data from the
network respectively.
Various Assembly instances are permanently programmed (static assembly) in
the fieldbus Controller.
Further information
The Assembly instances for the static Assembly are described in chapter
5.5.1.1 "Assembly Instance".
In addition to the static assembly, dynamic assembly can also be used with the
fieldbus Controller. The dynamic assembly can be used to set up Assembly In-
stances in which process data from various application objects can be config-
ured as required.
Further information
For information regarding the dynamic Assembly, please refer to chapter
3.2.7.4 "Dynamic Assembly".
WAGO-I/O-SYSTEM 750
DeviceNet
Feldbus-Koppler/-Controller • 73
Fieldbus Controller 750-806