11.4 MODBUS RTU Format11-1311.4 MODBUS RTU Format11.4.1 MODBUS RTU Command Format MODBUS RTU command formatSTART ADDRESS FUNCTION DATA CRC CHECK END3.5-charactertime8 bits 8 bits n*8 bits 16 bits 3.5-charactertimeADDRESS(station no.)8 bits, 0 to 247 (decimal)(Note) 0 = Broadcast addressFUNCTION 8 bitsDATA Varies depending on commands.CRC 16 bitsEND 3.5-character time(Differs depending on baud rate. Refer to the "reception judgment time" section.) Reception judgment timeThe process for receiving a message completes when the time that is exceeding the time mentioned below haspassed after the final data was received. Reception done judgment time is set at approx. 32 bits of time.Baud rate Reception donejudgment time300 Approx. 106.7 ms600 Approx. 53.3 ms1200 Approx. 26.7 ms2400 Approx. 13.3 ms4800 Approx. 6.7 ms9600 Approx. 3.3 ms19200 Approx. 1.7 ms38400 Approx. 0.8 ms57600 Approx. 0.6 ms115200 Approx. 0.3 ms230400 Approx. 0.14 msPhone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
