AH500 Programming Manual 6. The data transmission speed is as follows. 6-398 0110 (16#6) ： 115200 0111 (16#7) ： 230400 RS-232 does not support the baud rate. 1000 (16#8) ： 460800 RS-232 does not support the baud rate. 1001 (16#9) ： 921600 RS-232 does not support the baud rate. b8~b15 Undefined (reserved) Baud rate (bps) RTU timeout timer (ms) Baud rate (bps) RTU timeout timer (ms) 4800 9 115200 1 9600 5 230400 1 19200 3 460800 1 38400 2 921600 1 57600 1