Communications Capabilities
S5-115F Manual
The following two figures show the schematic sequence of data traffic between the master and
the slave.
Figure 7-2. Schematic of Master-Slave Data Traffic via SINEC L1 LAN
User program
of the source PLC
Inputs
Outputs
Flags
Data blocks
”Send” coordination
byte
2
7
2
0
Send mailbox
Flags
Data blocks
Operating system of the source PLC
Send buffer
Operating system of the destination PLC
Receive buffer
”Receive”
coordination byte
2
7
2
0
Receive mailbox
Flags
Data blocks
User program
of the destination PLC
Inputs
Outputs
Flags
Data blocks
7-4
EWA 4NEB 811 6148-02