| 摘要 |
PURPOSE:To recognize the same control state by comparing an opposite party's address detected from a received packet signal with the set address of an opposite party's device in an address comparator circuit, and deciding and processing the packet signal if they coincide with each other. CONSTITUTION:An opposite party's address detection circuit 5 detects only an opposite party's address from the received packet signal, and the address comparator circuit 6 compares the detected address with a preset address and an address to be controlled. If those addresses are coincident with each other, a gate circuit 4 is opened, and the received packet signal is transmitted to a control circuit 9 from a reception buffer 3. If not, the gate circuit 4 is closed, and the operation is waiting for the time when the next packet signal is received. The addresses are coincident with each other, and the received packet signal transmitted to the control circuit 9 through the gate circuit 4 is decoded and processed by the control circuit 9 to display the result on a display circuit 10. Thus all controllers can recognize the same control state, and additional installation of a controller can be easily realized.
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