i have same problem,
i write this program in my fx3u
M8411 ----------- Move H00A1 D8400 (38400, None, 8 Bit, 1 Bit, Rs232c)
----------- Move H11 D8401 (slave, Rtu)
----------- Move K10 D8411 (delay 10ms)
----------- Move H1 D8414 (Slave ID = 1)
and then im try to read coil with Qmodbus, but still no respon from slave, Setting port in Q modbus and serial port at pc same 38400, None, 8Bit, 1 Bit
thanks so much for yout help