Multi-master wire controller conflict detection method and master wire controller
A technology of conflict detection and main wire controller, which is applied in the direction of heating mode, heating and ventilation control system, lighting and heating equipment, etc., can solve problems such as communication failure and data disorder, and achieve the effect of safe and reliable communication
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Embodiment 1
[0034] Figure 4 It is a flow chart of the multi-master wire controller conflict detection method described in this embodiment. The purpose of this embodiment is to detect whether there is more than one master wire controller in the air conditioning system or air conditioning unit, so as to avoid multiple master wire controllers in the air conditioning system or air conditioning unit. Unreliable communication and other problems caused by the master wire controller, such as the detection of two or more wire controllers that are mistakenly set as the master wire controller during the dial setting, applicable In the case that the air conditioner or the air conditioner unit includes at least two main wire controllers, the at least two main wire controllers are connected to each other and to the air conditioner or the air conditioner unit through control lines, the method described in this embodiment can be implemented by the air conditioner system or the air conditioner The unit i...
Embodiment 2
[0047] Compared with Embodiment 1, on the basis of Embodiment 1, this embodiment further double-confirms the judgment of whether there is more than one main wire controller in the air-conditioning system, so as to avoid misjudgment caused by data sending and receiving errors , specifically, after the detection of the master wire controller conflict, it also includes:
[0048] The master wire controller adds one to the conflict count used to identify the number of conflicts between multiple master wire controllers. If the conflict count reaches a preset threshold, the master wire controller judges that the air conditioning system includes at least two master wire controllers, and sends a message to the air conditioning system. The bus sends an early warning message.
[0049] Further, preferably, the lengths of the first data and the second data are equal to a preset length.
[0050] Preferably, the preset length is one bit.
[0051] Furthermore, in this embodiment, the preset...
Embodiment 3
[0054] Figure 7 It is a schematic diagram of the zero-crossing circuit of the wire controller in this embodiment. The wire controller and the inner board of the air conditioner are connected through a three-core AC communication bus, A and B are the full-wave AC signals output by the transformer, and C is the data terminal. The AC communication protocol stipulates that the wire controller transmits in the positive half cycle of AC, and the internal board transmits in the negative half cycle. Such as Figure 7 As shown, D401, D402, C401, R409, R402, C402, Q402, R410, R411 form a zero-crossing detection circuit. R401, Q401, R408, U401, R412, C405, R404, R405 are data sending circuits. R406, R407, U402, R408, C404 are data receiving circuits. The wire controller only sends data in the positive half cycle of the AC. When the data sent by the wire controller is 0, the MCU output terminal = 0, Q401 is cut off, the U401 light-emitting terminal has no current, the thyristor is cu...
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