Data Exchange Between Modbus Master And I/O Modules - WAGO 750 Series Manual

Adding an offset of 0x0200 to the MODBUS output address lets you read
back output data.
Note
For MODBUS mapping, all output data over 256 words resides in the
memory area 0x6000 to 0x62FC, and can be read back with an offset of
1000
Fig. 3-9: Data exchange between MODBUS master and I/O modules
The MODBUS register assignments allow for a Fieldbus Master to read and
write data from the controller. The register mapping for IEC 61131.1 varies
from the MODBUS assignments. Please refer to section 3.1.5.6.2 for a
comparison of MODBUS TCP and IEC 61131.1 address mapping.
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
(0x1000) added onto the MODBUS address.
hex
MODBUS master
0x0000
0x6000
PII
0x62FC
0x00FF
Inputs
I/O modules
Programmable Fieldbus Controller
Fieldbus Controller 750-841
0x0000 0x6000
(0x0200) (0x7000)
PIO
00x0FF 0x62FC
(0x02FF) (0x72FC)
Outputs
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Data Exchange
PII = Process Input
Image
PIO = Process Output
Image
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