Siemens CPU 31 Series Technical Data Manual page 36

Communication
3.1 Interfaces
Properties of the PROFINET interface
Properties
IEEE standard
Connector design
Transmission speed
Media
Note
Networking PROFINET components
The use of switches, rather than hubs, for networking PROFINET components brings about
a substantial improvement in decoupling bus traffic, and improves runtime performance
under higher bus load. PROFINET CBA with cyclic PROFINET interconnections requires the
use of switches in order to maintain compliance with performance specifications. Full duplex
mode at 100 Mbps is mandatory for cyclic PROFINET interconnections.
PROFINET IO also requires the use of switches and 100 Mbps full duplex mode.
Reference
• For instructions on how to configure the integrated PROFINET interface, refer to
• For further information on PROFINET, refer to
• For detailed information on Ethernet networks, network configuration and network
•
• Further information about PROFINET: http://www.profinet.com
See also
PROFINET IO System (Page 3-19)
3-4
CPU 31xC and CPU 31x operating instructions (Setup)
components refer to the
available under article ID 8763736 at http://support.automation.siemens.com.
Component Based Automation, Commissioning SIMATIC iMap Systems - Tutorial,
Article ID 18403908
802.3
RJ45
Max. 100 Mbps
Twisted Pair Cat5 (100BASE-TX)
PROFINET System Description
SIMATIC NET Manual: Twisted-Pair and Fiber Optic Networks
.
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
S7-300,
,