WAGO I/O System 750 Series - Communication Interfaces; Memory Areas

Fieldbus Coupler • 51
Fieldbus Coupler 750-346
WAGO-I/O-SYSTEM 750
DeviceNet
3.1.5.1 Communication Interfaces
For a data exchange, the DeviceNet fieldbus coupler is equipped with two inter-
faces:
• 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 32 bytes for the physical input and 32
bytes for the physical output data.
I
O
1
2
memory area
for input data
I/O modules
input
modules
output
modules
memory area
for output data
fieldbus coupler
fieldbus
Fig. 3-9: Memory areas and data exchange for a fieldbus coupler g012447e
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 (32 bytes 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.