Ethernet
58 DDLS 200 Leuze electronic
10.6.1 Typical bus configuration
Figure 10.10: Typical Ethernet bus configuration
The optical data path has a maximum data rate of 2MBit/s in each direction of data transmission. In
the network, it must be ensured that the average data rate in each direction of transmission is less
than or equal to 2MBit/s. This is, amongst others, achieved by the following measures.
• Address filtering by upstream switch:
The upstream switch ensures that only messages are transmitted that are intended for the partici-
pant on the other end of the optical data transmission path. This leads to a significant reduction in
data
• Receive buffer:
Via the 16kByte receive buffer, brief peak loads can be managed without data loss. If the receive
buffer overflows, the subsequent messages are rejected (dropped).
• Primary transmission protocol:
The primary protocol (e.g., TCP/IP) ensures that messages are re-sent if they are lost or have
remained unacknowledged. In addition, protocols such as TCP/IP automatically adapt to the avail-
able bandwidth of the transmission medium.
TN
PLC
PLC
10/100MBit/s
10/100MBit/s
Moving cell 2
Moving cell 1
2MBit/s
2MBit/s
SwitchSwitch
10/100MBit/s
TN
TN TN
DT DT
DT DT
DDLS200_E.book Seite 58 Mittwoch, 19. Februar 2020 12:22 12
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