| 摘要 |
The method involves determining a root node as a basic element of a tree topology by the network nodes of the sub-network associated with communication devices. The sub-networks are coupled to each other through several communication devices. The communication terminal device (212, 214,223,224,231,233) of second terminal group is connected to the communication terminal device (211,221) of the first terminal group having the lowest path cost for a communications link to the root node of the sub-network among the communication terminal device of the first terminal group. The root node based loop-free connections to the other network nodes of the sub-network are constructed. The messages to other subnet according to a parallel or ring redundancy protocol are received. The communication terminal device of the first terminal group for a transmission of news is used according to the instep tree protocol within the subnet (101,102). The communication terminal device of the second terminal group for a transmission of news is used according to the parallel or ring redundancy protocol within the subnet (2). An independent claim is included for a communication apparatus for redundant operable industrial communication network. |
