Siemens SIMATIC S5-115F - Page 194

Communications Capabilities S5-115F Manual
Figure 7-10. Mailbox Structure in the Case of a Single-Channel SINEC L1 LAN
30 bytes
40 bytes
10 bytes
Send mailboxes Receive mailboxes
30 bytes
20 bytes
Master
SINEC L1 LAN
1
1
2
3
4
A0
B0
A2
B2
A3
B3
30 bytes
A4
B4
10 bytes
A0
B0
50 bytes
A1
B1
10 bytes
A0
B0
50 bytes
A1
B1
A0
B0
50 bytes
A1
B1
2A
2B
3A
3B
4A
4B
1A
1B
1A
1B
1A
1B
Slave 1
Slave 2
Slave 3
Slave 4
User
program
0A
0B
Send
mailbox
Operating
system
User
program
Receive
mailbox
Operating
system
7-18 EWA 4NEB 811 6148-02