hello all, i am implementing modbus protocol for HMI touch screen display with LPC2148. i have written my code and it is working fine. i am facing problem is function code of 0x10. i get query and i response. upto this it is fine but after responding HMI again gives me 01 00 00 DF (DF can be any 8bit number but 01 00 00 is constant). pls explain me what it is. thank you reagards