cifX Communication Interfaces Real-Time Ethernet - Hilscher

Device Connections and Switches 220/274
9.3.3 Use of Hubs and Switches
For the corresponding communication systems, the use of hubs and/or
switches is either forbidden or allowed. The following table shows the
acceptable use of hubs and switches by each communication system:
Communication System Hub Switch
EtherCAT forbidden only allowed between EtherCAT Master
and first EtherCAT Slave
(100 MBit/s, Full Duplex)
EtherNet/IP allowed allowed
(10 MBit/s/100 MBit/s,
Full or Half Duplex, Auto-Negotiation)
Open Modbus/TCP allowed allowed
(10 MBit/s/100 MBit/s,
Full or Half Duplex, Auto-Negotiation)
POWELINK allowed forbidden
PROFINET IO RT forbidden Only allowed, if the switch supports
‚Priority Tagging’ and LLDP
(100 MBit/s, Full Duplex)
SERCOS III forbidden forbidden
Table 67: Use of Hubs and Switches
NOTICE!
Failure of the Network Communication
• Do not operate hardware with the communication controllers netX 50,
netX100 or netX 500 with the protocols Ethernet TCP/UDP/IP,
EtherNet/IP or Modbus TCP at 10 MBit/s in half-duplex mode, otherwise
failure of the network communication can occur.
• Use only switches or 10/100 MBit/s dual-speed hubs and ensure that
the network operates at 100 MBit/s and in full-duplex mode.
Failure of the Network Communication
• Do not operate hardware with the communication controllers netX 50,
netX100 or netX 500 with the protocols Ethernet TCP/UDP/IP,
EtherNet/IP or Modbus TCP at 10 MBit/s in half-duplex mode, otherwise
failure of the network communication can occur.
• Use only switches or 10/100 MBit/s dual-speed hubs and ensure that
the network operates at 100 MBit/s and in full-duplex mode.
For further information refer to section Failure in 10 MBit/s Half Duplex
Mode and Workaround on page 199.
cifX Communication Interfaces Ethernet | Installation, Operation and Hardware Description
DOC060501UM30EN | Revision 30 | English | 2011-06 | Released | Public © Hilscher, 2006-2011