Figure 41: Data Exchange Between Modbus Master And I/O Modules; Table 31: Allocation Of Digital Inputs And Outputs To Process Data Words In - WAGO -I/O-SYSTEM 750 XTR Manual

WAGO-I/O-SYSTEM 750 XTR
750-352/040-000 FC ETHERNET G3 XTR
Access by word to the digital I/O modules is carried out in accordance with the
following table:
Table 31: Allocation of Digital Inputs and Outputs to Process Data Words in Accordance with the
Intel Format
Digital inputs/
outputs
Process data
word
Byte
Output can be read back in by adding an offset of 200
MODBUS address.
Data > 256 words can be read back by using the cumulative offset!
All output data greater than 256 words and, therefore located in the memory
range 0x6000 to 0x62FC, can be read back by adding an offset of 1000
(0x1000) to the MODBUS address.

Figure 41: Data Exchange Between MODBUS Master and I/O Modules

Register functions start at address 0x1000. These functions can be addressed in
a similar manner with the MODBUS function codes that are implemented
(read/write).
The specific register address is then specified instead of the address for a
module channel.
Additional Information
A detailed description of the MODBUS addressing may be found in Chapter
"MODBUS Register Mapping".
16. 15. 14. 13. 12. 11. 10.
Bit Bit Bit Bit Bit
15 14 13 12 11
High byte D1
Function Description
9. 8. 7.
Bit Bit Bit Bit Bit Bit
10 9 8 7 6
(0x0200) to the
hex
83
6. 5. 4. 3. 2. 1.
Bit Bit Bit Bit Bit
5 4 3 2 1
Low byte D0
hex
Manual
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