Eaton easyE4 Manual page 649

Table 123: How the Modbus registers and write data for the easyE4 Modbus server are mapped
Function Modbus
codeModbus reg.#
0x06
(Write Single
1001
Register)
...
and
1512
0x10
(Write Multiple
2001
Register)
...
2032
Please note that little-endian is used when converting bytes to words in
an easyE4. If you want to implement Modbus communications with big-
endian, you will need to make the necessary adjustments.
See also
easyE4 10/19 MN050009 EN www.eaton.com
10. Connection to other devices
Operand Description
MW1 Marker word 1
... ...
MW512 Marker word 512
NW1 NET marker
word 1
... ...
NW32 NET marker
word 32
10.2 Modbus TCP
Remark
645