Communication device for the connection of a field device of an industrial automation system with a fail-safe control unit and industrial automation system

摘要

For the highly available connection of automation devices with completely independent ethernet - interfaces within a redundant komunikationsnetzes is connected to simple automation devices for the respective simple bonded, automation device is used a y - switch. In this case, the y - switch via a first or second port having a first and / or sub-network of the redundant communications network, while it is provided with a third port directly or indirectly with the automation device is connected simply tied. In addition, incoming data frame at the first, second and third port a first, second and third vlan associated with. In addition, the first and second port as untagged member for the first and third vlan and / or for the second and third vlan arranged. The third port is performed for all three vlans untagged member is set up as. At the first two ports learned unicast - mac - addresses are automatically as a static entry for the third vlan taken. In the case of erasing a at the first two ports learned unicast - mac - address is also a deletion of the corresponding static entry for the third vlan.