The RS485 transmission net is made up of the data collection station, which can transmit for remote distance and restrain common mode interference.
各采集器以网络结点的方式挂接到RS485传输网络上，传输距离远，还可有效的抑制共模干扰。
The paper mainly introduces data collection system of oil-well measurement station, and control system based on PLC, and discusses system working principle of measurement station.
文章介绍了油井计量站油井产量数据自动采集系统和基于PLC的自动控制系统构成，阐述了系统工作原理。
The communication net depends on telephone as warning flood channel; data transmission instrument as data collection transmission base equipment; middle station as merged point.
介绍了以电信电话公网为报汛信道，以数传仪为数据采集传输基础设备，中间站为汇集点的星形远程自动报汛通信网。
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