Addressing - WAGO 750-306 Technical Description

3.2.5.3 Addressing

3.2.5.3.1 Fieldbus Specific
Once the supply voltage is applied, the Assembly Object maps data from the
process image. As soon as a connection is established, a DeviceNet Master
(scanner) can address and access the data by "Class", "Instance" and "Attrib-
ute" or read and/or write the data using I/O connections.
Data mapping depends on the selected Assembly instance of the static assem-
bly or on the application specific determination with the dynamic Assembly.
Further information
The Assembly Instances of the static Assembly are described in chapter
5.5.1.1 "Assembly Instance".
Further information
For information regarding the dynamic Assembly, please refer to chapter
3.2.7.4 "Dynamic Assembly".
Fig. 3-2: Fieldbus specific data exchange for a DeviceNet fieldbus Controller
Note
For the number of input and output bits or bytes of the individual I/O modules,
please refer to the corresponding I/O module description.
Note
A process image restructuring may result if a node is changed or extended. In
this case, the process data addresses also change in comparison with earlier
ones. In the event of adding a module, take the process data of all previous
modules into account.
WAGO-I/O-SYSTEM 750
DeviceNet
Connection
Object
Producer
fieldbus
master
Consumer
Programmable fieldbus controller
Object directory()
Assembly Application
Object Object
Input-
Assemly
Digital I/O,
Analog I/O
Output-
Assemly
Feldbus-Koppler/-Controller • 77
Fieldbus Controller 750-806
memory area
for input data
word 0
1 1
input
modules
word 255
3 3
word 256
IEC 61131
PFC
program
input
variables
CPU
word 511
memory area
for output data
word 0
2
output
modules
word 255
word 256 4
PFC
output
variables
word 511
I/O modules
I
O
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