Method of meter reading and maintenance multiplexing of interface converter rs485 communication interface
A technology of interface converter and communication interface, which is applied in the direction of instruments, signal transmission systems, electrical signal transmission systems, etc., can solve the problems of reducing the efficiency of on-site construction, and achieve the effect of reducing human intervention, reducing quantity, and increasing construction efficiency
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[0021] Interface converter RS485 communication interface meter reading and maintenance multiplexing method, such as figure 1 shown, including the following steps:
[0022] Step 1. Determine the current state of the RS485 communication interface. According to the function, it is divided into idle state, maintenance state and meter reading state. If it is in the maintenance state, enter step 4. If it is in the maintenance state at this time, the current RS-485 communication interface is considered It is still in the interactive state of passive reception and does not have the ability to actively initiate communication for the time being. It needs to wait for the end of the maintenance state; otherwise, go to step 2; the current state of the RS485 communication interface is judged as follows: If the initiator of this communication is the converter itself, It is considered that the current RS485 communication interface is in the meter reading state; if the initiator of this commun...
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