Patent ID: 8186948

Claim:
A wind energy plant comprising a nacelle ( 16 ), a rotor, which has at least one rotor blade ( 10 ) having an adjustable blade pitch angle, a central control device ( 18 ) for controlling the wind energy plant and a control unit ( 36 ) disposed in the rotor for controlling the blade pitch angle of the at least one rotor blade ( 10 ), wherein the central control device ( 18 ) and the control unit ( 36 ) in the rotor can exchange data with each other via a data link, which comprises at least one first sending and receiving device ( 22 ) at the nacelle and at least one second sending and receiving device ( 26 ) at the rotor, wherein a wireless network connection ( 76 ) with a safety-oriented communication protocol is provided between the at least one first sending and receiving device ( 22 ) and the at least one second sending and receiving device ( 26 ), wherein a first monitoring- and communication device ( 32 ) is associated to the at least one first sending and receiving device ( 22 ), and can monitor a function of the at least one first sending and receiving device ( 22 ) and initiate a predetermined action in the case of an error, wherein a second monitoring- and communication device ( 34 ) is associated to the at least one second sending and receiving device ( 26 ) and can monitor a function of the at least one second sending and receiving device ( 26 ) and initiate a predetermined action in case of an error, wherein at least one emergency shut-down push button switch ( 74 ) is disposed in the rotor, the actuation of which can be notified to the central control device ( 18 ) via a network, wherein the wireless network connection ( 76 ) represents a component of the network.