User Manual of EM760 High-Performance Inverter 2) Check whether the line is connected. Send: 01 08 00 00 AA 55 5E 94 Return: 01 08 00 00 AA 55 5E 94 (normal) Return: 01 88 04 47 C3 (exception, assuming a slave protection) 3) Change the carrier frequency (F00.23) to 4.0kHz. (use the function code 0x06 as such function codes are expected to be stored in EEPROM after change) Send: 01 06 00 17 00 28 39 D0 Return: 01 06 00 17 00 28 39 D0 (normal) Return:
01 86 04 43 A3 (exception, assuming a slave protection) 277 Send Normal Return Exception Return * Frame header ≥3.5 characters (idle) 1 Address 01 Address 01 Address 01 2 Function 08 Function 08 Function code 88 3 Sub-function code Hi 00 Sub-function code Hi 00 Exception code 04 (assumption) 4 Sub-function code Lo 00 Sub-function code Lo 00 CRC check Lo 47 5 Data Hi AA Data Hi AA CRC check Hi C3 6 Data Lo 55 Data Lo 55 7 CRC check Lo 5E CRC check Lo 5E 8 CRC check Hi 94 CRC check Hi 94 * Tail ≥3.5 characters (idle) Send Normal Return Exception Return * Frame header ≥3.5 characters (idle) 1 Address 01 Address 01 Address 01 2 Function code 06 Function code 06 Function code 86 3 Register address Hi 00 Register address Hi 00 Exception code 04 (assumption) 4 Register address Lo 17 Register address Lo 17 CRC check Lo 43 5 Register value Hi 00 Register value Hi 00 CRC check Hi A3 6 Register value Lo 28 Register value Lo 28 7 CRC check Lo 39 CRC check Lo 39 8 CRC check Hi D0 CRC check Hi D0 * Tail ≥3.5 characters (idle)