WAGO-I/O-SYSTEM 750 XTR
Function Description 83
750-352/040-000 FC ETHERNET G3 XTR
Manual
Version 1.3.0
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
16. 15. 14. 13. 12. 11. 10. 9. 8. 7. 6. 5. 4. 3. 2. 1.
Process data
word
Bit
15
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
Byte
High byte D1
Low byte D0
Output can be read back in by adding an offset of 200
hex
(0x0200) to the
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
hex
(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".
