Posted 8 Jul 2016 (edited) I want to control plc mitsubishi FX3U via FX-USB-AW, but when i send command RR (<ENQ>00FFRR0) by using terminal, plc FX3U always return 0x95 0x95 0x95 0x95. I setting parameter of plc like this topic: http://stackoverflow.com/questions/13807495/rs232-communication-protocol-mitsubishi-fx3g-plc Does anyone had experience with control plc via FX-USB-AW? please help me. Edited 8 Jul 2016 by Legend22 Share this post Link to post Share on other sites