WAGO 750-341 Manual page 47

If the quantity of I/O data is greater than 256 words, the additional data is
appended at the end of the process image in word 256 to 511.
In contrast to the above, access from the fieldbus side is fieldbus specific. For
the ETHERNET TCP/IP fieldbus coupler, either a MODBUS/TCP master or
an Ethernet/IP master is used. MODBUS/TCP accesses the data via
implemented MODBUS functions. Here decimal and/or hexadecimal
MODBUS addresses are used. With Ethernet/IP, data access occurs with the
use of an object model.
Further information
A detailed description of these fieldbus-specific data access operations is
given in the sections "MODBUS functions" and "Ethernet/IP
(Ethernet/Industrial Protocol)".
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Fieldbus Coupler 750-341
Process image
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