| 摘要 |
A communication system consisting of network nodes for operating industrial machines and a method for controlling a communication system. The invention relates to a communication system consisting of network nodes ( 1, 2, 3, 4, 5 ) belonging to a control and/or drive network ( 11, 12 ) wherein control and/or regulating signals are exchanged between network nodes via a closed ring-shaped signal line ( 6,7 ) in order to operate industrial machines. A network node ( 2 ) exchanges signals with at least one other network node ( 1, 3 ) via a bi-directional signal path. At least one network node ( 2 ) comprises a switching unit ( 8 ) which can be connected to two other network nodes via two bi-directional signal paths ( 10 ). The communication system can by configured to form various networks ( 11,12 ) by means of a corresponding switching position of the switching units of the network nodes, said networks ( 11, 12 ) being provided with separate signal lines ( 6,7 ). |
