158 •
I/O Modules
Structure of the PROFINET IO Process Data
WAGO-I/O-SYSTEM
750
PROFINET IO
5.2.5.7 Serial
Interfaces
750-650, 753-650, 750-651, 753-651, 750-653, 753-653
Process Image in [Byte]
Register communication using the
PROFINET IO process image?
Input Output
Yes (not possible)
-
-
No 6
6
Mapping with access to the register structure
Data format
MOTOROLA
INTEL
I/O
range
Input Output Input Output
S C S C
D0 D0 D0 D0
D1 D1 D1 D1
D2 D2 D2 D2
D3*
1)
D3*
1)
D3*
1)
D3*
1)
Channel 0
D4*
2)
D4*
2)
D4*
2)
D4*
2)
If bytes D3 and D4 contain data depends on the data width:
*1)
D3 contains data with cases 4 and 5 byte mode
*2)
D4 contains data in case 5 byte mode.
Bytes D3 and D4 are reserved in 3 byte mode (factory setting) and contain no reference
data.