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• Fieldbus Coupler/Controller
Fieldbus Coupler 750-306
WAGO-I/O-SYSTEM 750
DeviceNet
3.1.5.1 Communication Interfaces
For a data exchange, the DeviceNet fieldbus Coupler is equipped with two in-
terfaces:
•
the interface to fieldbus (-master) and
•
the interface to the bus modules.
Data exchange takes place between the fieldbus master and the bus modules.
Access from the fieldbus side is fieldbus specific.
3.1.5.2 Memory Areas
The Coupler uses a memory space of 256 words (word 0 ... 255) for the physi-
cal input and output data.
The division of the memory spaces is identical with all WAGO fieldbus Cou-
plers.
I
O
1
2
memory area
for input data
I/O modules
input
modules
word 255
output
modules
word 0
word 255
word 0
memory area
for output data
fieldbus coupler
fieldbus
Fig. 3-9: Memory areas and data exchange for a fieldbus Coupler
g012433e
The Coupler process image contains the physical data of the bus modules in a
storage area for input data and in a storage area for output data (word 0 ... 255
each).
1
The input module data can be read from the fieldbus side.
2
In the same manner, writing to the output modules is possible from the
fieldbus side.
