Failed_Reason_Other_Than_A_Connection_Already_Exists是什么意思？

Question

我正在尝试使用LLRP连接到Impinj Speedway RFID读取器，并收到以下错误代码: Failed_Reason_Other_Than_A_Connection_Already_Exists

更具体地说，我发送了一条GET_READER_CONFIG消息，并获得：

<?xml version="1.0" encoding="UTF-8"?>
<llrp:READER_EVENT_NOTIFICATION xmlns:llrp="http://www.llrp.org/ltk/schema/core/encoding/xml/1.0" Version="1" MessageID="0">
    <llrp:ReaderEventNotificationData>
        <llrp:UTCTimestamp>
            <llrp:Microseconds>50408-10-10T04:34:25.209Z</llrp:Microseconds>
        </llrp:UTCTimestamp>
        <llrp:ConnectionAttemptEvent>   
            <llrp:Status>Failed_Reason_Other_Than_A_Connection_Already_Exists</llrp:Status>
        </llrp:ConnectionAttemptEvent>
    </llrp:ReaderEventNotificationData>
</llrp:READER_EVENT_NOTIFICATION>