WAGO 750-341 Manual page 67

Digital Inputs/Outputs
Process data word
Byte
Table 3.1.2: Allocation of digital inputs/outputs to process data word acc. Intel format
The outputs can be read back by adding 0x0200 to the MODBUS address.
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. 3.1-7: Data exchange between the MODBUS master and I/O modules
Starting from address 0x1000 there are the register functions. The register
functions made available in the coupler, can be addressed by the MODBUS
master along with the implemented MODBUS function codes (read/write). To
this effect, the individual register address is entered in place of the address of
a module channel.
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
16. 15. 14. 13. 12. 11. 10. 9.
Bit Bit
15 14
High-Byte
D1
(0x1000) added onto the MODBUS address.
hex
MODBUS master
0x0000
PII
0x00FF
Inputs
I/O modules
Fieldbus Coupler
Fieldbus Coupler 750-341
Bit Bit Bit Bit Bit Bit
13 12 11 10 9 8
0x0000
0x6000
(0x0200)
00x0FF
0x62FC
(0x02FF)
Data Exchange
8. 7. 6. 5. 4. 3.
Bit Bit Bit Bit Bit Bit
7 6 5 4 3 2
Low-Byte
D0
0x6000
(0x7000)
PIO
0x62FC
(0x72FC)
Outputs
PII = Process Input
PIO = Process Output
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2. 1.
Bit Bit
1 0
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