FOXBORO FBM240 P0917GZ通道隔離開關(guān)
這種情況可能是由錯(cuò)誤的消息格式（如波特率或成幀）、兩個(gè)RS485雙絞線連接的極性顛倒或主機(jī)未發(fā)送當(dāng)前編程的PQM地址造成的。如果PQM被有效消息定期尋址，RX1/2指示燈將點(diǎn)亮，TX1/2指示燈隨后點(diǎn)亮。?TX1:PQM點(diǎn)亮?xí)r通過COM1 RS485通信端口傳輸信息。?RX1：點(diǎn)亮?xí)r，PQM通過COM1 RS485通信端口接收信息。?TX2:PQM點(diǎn)亮?xí)r通過COM2 RS485通信端口傳輸信息。?RX2：當(dāng)點(diǎn)亮?xí)r，PQM通過COM2 RS485通信端口接收信息。3.2.4繼電器輸出繼電器的狀態(tài)與這些指示器一起顯示。?報(bào)警：報(bào)警繼電器用于通用報(bào)警輸出。報(bào)警繼電器工作時(shí)，該指示燈點(diǎn)亮。當(dāng)條件清除時(shí)，報(bào)警指示燈熄滅。如果報(bào)警繼電器已編程為鎖定，則只能通過按鍵或發(fā)出計(jì)算機(jī)重置命令來清除報(bào)警條件。
This condition can be caused by incorrect message formats (such as baud rate or framing), reversed polarity of the two RS485 twisted-pair connections, or the master not sending the currently programmed PQM address. If the PQM is being periodically addressed with a valid message, the RX1/2 indicator will turn on followed by the TX1/2 indicator. ? TX1: The PQM is transmitting information via the COM1 RS485 communications port when lit. ? RX1: The PQM is receiving information via the COM1 RS485 communications port when lit. ? TX2: The PQM is transmitting information via the COM2 RS485 communications port when lit. ? RX2: The PQM is receiving information via the COM2 RS485 communications port when lit. 3.2.4 Relays The status of the output relays is displayed with these indicators. ? ALARM: The ALARM relay is intended for general purpose alarm outputs. This indicator is on while the ALARM relay is operating. When the condition clears, the ALARM indicator turns off. If the alarm relay has been programmed as latched, the alarm condition can only be cleared by pressing the key or by issuing a computer reset command.
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