WAGO -I/O-SYSTEM 750 Series Manual page 58

58 • Fieldbus-specific behavior
ETHERNET
The AS-Interface master module occupies a process image of 12 bytes when
the mailbox size is 6 bytes. The mailbox is permanently superimposed.
Fig. 4-4: Register assignment, AS-Interface master module
The input data for the AS-Interface master module are mapped onto input
registers 2 to 7. Register 2 contains the status byte and one empty byte.
Registers 3 to 5 contain the mailbox data. Registers 6 and 7 contain the
process data.
The data can be read with FC 3 (start address 2, length 6).
The output data are mapped onto output registers 0 to 5. Register 0 contains
the control byte and one empty byte. Registers 1 to 3 contain the mailbox data.
Registers 4 and 5 contain the process data.
The data can be written with FC 16 (start address 0, length 6).
1 2 3 4 5 6 7 8
DI DI DI DI
DI DI AI AI AS-i AO AO
452
402 402 402 602 655 602 550
9 10 11 12 13
AI AI AO AO AI AI DO DO
452 550 452 602 504 600
Input register
0
1
2 Status
3 Mailbox
4 Mailbox
5 Mailbox
6 Data
7 Data
8
9
10
11
12
Output register
0 Control
Mailbox
1
2 Mailbox
3 Mailbox
4 Data
5 Data
6
7
8
9
10
Access to data with FC 3,
Start address 2, Length 6
Access to data with FC 16,
Start address 0, Length 6
g065507e
WAGO-I/O-SYSTEM 750
I/O Modules