| 摘要 |
<p>A data communication method, a communication equipment and a communication system are provided. The method comprises the following steps: a master equipment, through its first RS485/RS422 port and second RS485/RS422 port, is connected to at least two slave equipments by the RS485/RS422 bus loop line, when the data is transmitted from the first RS485/RS422 port of the master equipment to the slave equipment connected to the first RS485/RS422 port of the master equipment, starting the data transmission function on the first RS485/RS422 port of the master equipment while stopping the data transmission function on the second RS485/RS422 port of the master equipment(101); when a line interruption occurrence is detected, stopping the data transmission function on the first RS485/RS422 port of the master equipment while starting the data transmission function on the second RS485/RS422 port of the master equipment(102).</p> |
