Memory Areas - WAGO 750 Series Manual

3.1.5.1 Memory areas

Fig. 3.1-9: 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 on the output modules is possible from the
In addition, all output data of the ETHERNET TCP/IP coupler are mirror
imaged on a storage area with the address offset 0x0200. This allows to read
output values back by adding 0x0200 to the MODBUS address.
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
fieldbus
master
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
Fieldbus coupler 750-342 • 49
Data exchange
I/O modules
I
O
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