Patent ID: 8567869

Claim:
A shield control device of a longwall shield for carrying out the longwall functions of the longwall shield in the longwall face working in a mine, wherein for the purpose of electrical data transfer the shield control device is connected on the one hand with the external shield control devices, in particular with the shield control devices of the other longwall shields of the longwall face as well as with the central control device and on the other hand via internal connecting means with the function elements of the shield, and wherein the shield control device comprises a microprocessor with memory to store a code signal containing a shield codeword assigned to it and allows data transfer to its function elements via the internal connecting means only when it is triggered by the shield codeword assigned to it, wherein to each function element of the longwall shield a code signal containing an address codeword that is valid only for this function element is assigned, wherein in the internal connecting means between the shield control device and the function elements and spatially close to it a distributor is connected, wherein the distributor comprises a microprocessor with memory as well as switching equipment to switch the internal connecting means, wherein in the memory the address codewords of the assigned function elements are stored, and wherein the switching equipment upon receiving a code signal from the shield control device containing a call codeword can be actuated by the microprocessor in that sense that the connecting means for signal transfer between the shield control device and that function element whose address codeword is identical with the call codeword, can be activated.