Eaton easyE4 Manual page 648

10. Connection to other devices
10.2 Modbus TCP
644
Function code Modbus
Modbus reg. #
0x02 (Read dis- 1
crete input) Max.
...
512 inputs at once,
8
8 inputs are
grouped into a
17
byte
...
128
1001
...
1512
2001
...
2512
3001
...
3024
3125
...
3196
0x04 (Read Input 1
Register) Max. 125
...
registers at once, 1
4
register = 2 bytes /
1 word
5
...
48
1001
...
1512
2001
...
2032
If a function code is used on Modbus registers that are not listed (gray), a value of 0 or an exception code will be returned.
easyE4 10/19 MN050009 EN www.eaton.com
Operand Description
I1 Bit input 1
... ...
I8 Bit input 8
I17 Expansion bit input
... ...
I128 Expansion bit input
M1 Marker bit 1
... ...
M512 Marker bit 512
N1 NET marker bit 1
... ...
N512 NET marker bit 512
ID1 Diagnostics bit 1
... ...
ID24 Diagnostics bit 24
ID25 Diagnostics bit 25
... ...
ID96 Diagnostics bit 96
IA1 16-Bit analog input 1
... ...
IA4 16-Bit analog input 8
IA5 16-Bit analog input
... ...
IA48 16-Bit analog input
MW1 Marker word 1
... ...
MW512 Marker word 512
NW1 NET marker word 1
... ...
NW32 NET marker word 32
Remark
Local inputs base device
local inputs expansion
Only the local NET marker bits
and no marker bits of the other
stations are returned
Diagnostics for base device
Diagnostics extension
Local analog inputs base
device
Local analog inputs expansion
Only the local NET marker
words will be returned, i.e.,
accessing NET markers from
other nodes is not possible.
NET marker bytes and NET
marker double words can be
calculated based on the NET
marker words.