Communication Interfaces; Memory Areas - WAGO 750-306 Technical Description

48 • Fieldbus Coupler/Controller
Fieldbus Coupler 750-306

3.1.5.1 Communication Interfaces

For a data exchange, the DeviceNet fieldbus Coupler is equipped with two in-
terfaces:
•
•
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.
fieldbus
Fig. 3-9: Memory areas and data exchange for a fieldbus Coupler
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
the interface to fieldbus (-master) and
the interface to the bus modules.
fieldbus side.
fieldbus coupler
memory area
for input data
word 0
1
input
modules
word 255
memory area
for output data
word 0
2
output
modules
word 255
I/O modules
I
O
g012433e
WAGO-I/O-SYSTEM 750
DeviceNet