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3.1.5.4.1
Overview of the MODBUS TCP addresses
3.1.5.4.1.1
Word Access
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Method
FC3
- Read Multiple Register
FC4
– Read Holding Register
FC16
– Write Multiple Register
Fieldbus Coupler 750-341
MODBUS Addresses
decimal
hexadecimal
0...
255
256...
511
512 ...
767
768 ...
1023
illegal Address
4096...
8191
8192 ...
12287
12288...
24575
24576 ...
25340
28672 ...
29436
0...
255
256...
511
512...
767
768 ...
1023
illegal Address
4096...
8191
illegal Address
12288...
24575
24576 ...
25340
28672 ...
29436
Data Exchange
Description
0x0000 –
phys. Inputs (1)
0x00FF
0x0100 –
reserved
0x01FF
0x0200 –
phys. Outputs (1)
0x02FF
0x0300 –
reserved
0x03FF
0x0400 –
0x0FFF
0x1000 –
Configuration register
0x1FFF
0x2000 -
Firmware register
0x2FFF
0x3000 -
reserved
0x5FFF
0x6000-
phys. Inputs (2)
0x62FC
0x7000-
phys. Outputs (2)
0x72FC
0x0000 –
phys. Outputs (1)
0x00FF
0x0100 –
reserved
0x01FF
0x0200 –
phys. Outputs (1)
0x02FF
0x0300 –
reserved
0x03FF
0x0400 –
0x0FFF
0x1000 –
Configuration register
0x1FFF
0x2000 -
Firmware register
0x2FFF
0x3000 -
reserved
0x5FFF
0x6000-
phys. Outputs (2)
0x62FC
0x7000-
phys. Outputs (2)
0x72FC
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