4
Installation notes
MOVI-C® CONTROLLER power UHX85A – R / power eco UHX84A–R
Manual – MOVI-C
®
CONTROLLER
26
4.3.4 The integrated Ethernet switch
The device is equipped with an integrated 2 port Ethernet switch for connecting the
fieldbus technology. The following network topologies are supported:
• Tree topology
• Star topology
• Line topology
• Ring topologies (supported by device firmware version V19 and later)
INFORMATION
The number of industrial Ethernet switches connected in line impacts the telegram
runtime. If a telegram passes through the devices, the telegram runtime is delayed by
the "store-and-forward" function of the Ethernet switch:
• For a telegram length of 64 bytes by approximately 10µs (at 100 MBit/s)
• For a telegram length of 1500 bytes by approximately 130µs (at 100 MBit/s)
→ This means the more devices a telegram has to pass through, the higher the tele-
gram runtime is.
Auto-crossing
The two ports leading out of the Ethernet switch have auto-crossing functionality. You
can use both patch and crossover cables to connect to the next Ethernet node.
Auto-negotiation
The baud rate and duplex mode are negotiated by both Ethernet nodes when estab-
lishing the connection. For this purpose, both Ethernet ports of the EtherNet/IP™ con-
nection support an auto-negotiation functionality and work with a baud rate of either
100 MBit or 10 MBit in full duplex or half-duplex mode.
Notes on multicast handling
• The integrated Ethernet switch does not provide a filter function for Ethernet mul-
ticast telegrams. Multicast telegrams are sent from the adapters (device) to the
scanners (PLC) and passed on to all switch ports.
• IGMP snooping (e.g. Managed Switches) is not supported.
INFORMATION
SEW‑EURODRIVE recommends to connect the device only with the following net-
work components:
• That support IGMP snooping (e.g. Managed Switch).
• That have protection mechanisms against high Multicast load (e.g. units from
SEW‑EURODRIVE). Devices that do not have this function may be faulty due to
high network load.
4.3.5 Status LEDs in EtherNet/IP™ and Modbus/TCP mode
Status LED "L23.2" (NETWORK STATUS)
Indicates the status of the fieldbus system.
22781455/EN – 05/2016
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