FOXBORO FBM241 P0914TG輸入電壓監(jiān)視器
在模擬模式下，PQM將忽略在其輸入端檢測到的測量參數(shù)，并使用存儲在S5測試\模擬設定點組中的模擬值自檢：在PQM自檢過程中檢測到的任何異常情況，如硬件故障，都會導致自檢指示燈亮起。PQM失去控制電源也會導致自檢指示器亮起，表明不存在計量。3.2.3通信通信指示器監(jiān)控RS485通信端口的狀態(tài)。當沒有通過后部串行端口端子接收到串行數(shù)據(jù)時，RX1/2指示燈熄滅。如果沒有連接、串行線斷開或主計算機處于非活動狀態(tài)，則會出現(xiàn)這種情況。如果串行端口上有活動，但PQM未收到其內(nèi)部編程地址的有效消息，則TX1/2指示燈保持關(guān)閉。
While in simulation mode, the PQM will ignore the measured parameters detected at its inputs and will use the simulated values stored in the S5 TESTING \ SIMULATION setpoints group. ? SELF TEST: Any abnormal condition detected during PQM self-monitoring, such as a hardware failure, causes the SELF TEST indicator to be on. Loss of control power to the PQM also causes the SELF TEST indicator to turn on, indicating that no metering is present. 3.2.3 Communicate The COMMUNICATE indicators monitor the status of the RS485 communication ports. When no serial data is being received through the rear serial ports terminals, the RX1/2 indicators are off. This situation occurs if there is no connection, the serial wires become disconnected, or the master computer is inactive. If there is activity on the serial port but the PQM is not receiving valid messages for its internally programmed address, the TX1/2 indicators remain off.
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