Layout and connections vacon • 17
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4
4.3.2 Machine to machine
Requirements:
- Industrial environment
- Fast communication in use
Figure 4. Ethernet, Machine to Machine
4.4 Connections and wiring
The option boards have two Ethernet ports and an embedded switch. An option board is seen in
network as a single device as it has only one MAC and IP address. This configuration enables three
different topologies:
• Star (see Chapter 4.4.1 "Topology: Star")
• Daisy chain (see Chapter 4.4.2 "Topology: Daisy Chain")
• Ring (see Chapter 4.4.3 "Topology: Ring")
Each of these topologies has their own advantages and disadvantages. When designing the network
you must carefully consider the risks and benefits against the cost of the selected topology.
Both boards support 10/100 Mb speeds in both Full- and Half-duplex modes. However, real-time
process control requires the Full-duplex mode and the 100-megabit speed. The boards must be
connected to the Ethernet network with a Shielded Twisted Pair (STP) CAT-5e cable (or better).
Use only industrial standard components in the network and avoid complex structures to minimize
the length of response time and the amount of incorrect dispatches. Both option boards have an
internal switch, so it does not matter in which port of the option board the Ethernet cables are
connected to.
Power
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MASTER
Real-Time Control
- Start/Stop, Direction,...
- Reference
- Feedback
Ethernet switch
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