# 通訊

- [NPN 輸出](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/oct-output-setup.md): 輸出
- [類比電流輸出(4-20mA)](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/current-output.md)
- [RS485 與 Modbus RTU 設定](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/rs485-setup.md)
- [Modbus RTU Protocol](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol.md)
- [唯讀型記憶體](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/wei-du-xing-ji-yi-ti.md)
- [唯讀型記憶體-列表](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/wei-du-xing-ji-yi-ti/wei-du-xing-ji-yi-ti-lie-biao.md)
- [唯讀型記憶體-讀取指令(04)](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/wei-du-xing-ji-yi-ti/read-only-memory-read-instruction-04-and-memory-lists.md)
- [讀寫型記憶體](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/du-xie-xing-ji-yi-ti.md): 讀寫型記憶體
- [讀寫型記憶體-讀取列表](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/du-xie-xing-ji-yi-ti/du-xie-xing-ji-yi-ti-du-qu-lie-biao.md)
- [讀寫型記憶體-讀取指令(03)](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/du-xie-xing-ji-yi-ti/du-xie-xing-ji-yi-ti-du-qu-zhi-ling-03.md)
- [讀寫型記憶體-單Register寫入指令(06)](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/du-xie-xing-ji-yi-ti/du-xie-xing-ji-yi-ti-dan-register-xie-ru-zhi-ling-06.md)
- [讀寫型記憶體-雙Register寫入指令(30)](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/du-xie-xing-ji-yi-ti/du-xie-xing-ji-yi-ti-shuang-register-xie-ru-zhi-ling-30.md)
- [讀寫型記憶體-四個Register寫入指令(31)](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/du-xie-xing-ji-yi-ti/du-xie-xing-ji-yi-ti-si-ge-register-xie-ru-zhi-ling-31.md)
- [Single Bit 資料讀寫指令(01/05)(人機介面常用)](/qr/fu-lt-ultrasonic-flowmeter-manual-chinese-v1/communication/modbus-rtu-protocol/single-bit-zi-liao-du-xie-zhi-ling-0105-ren-ji-jie-mian-chang-yong.md): 指令目的及使用時機： 部分的人機介面僅支援 05寫入指令 發送 重置累計量訊號。其中更有部分人機介面同時要求支援01讀取指令讓人機介面確認感測器能正常工作。