Sanyo VCC-MD300 Technical Manual

Sanyo VCC-MD300 Technical Manual Manual pdf 7 page image

− 6 −[1] Communications FormatThe communication unit is a 4 (min)-24 (max) bytepacket.・Communications Speed:2400, 4800, 9600, 19200, 384009600 bps(DEFAULT MD800 – 500)* MD400 and MD300 cannot connect at 38400bps.DEFAULT is 19200bps.・Data Length: 8 bit・Start Bit: 1 bit・Stop Bit: 1 bit・Parity:None・Flow Control: NonePacket Format⁃Header Message0 Message1 Message2 Checksum Terminator(0xFF)Header Format⁃Bit 7(MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0(LSB)Bit 11 0/1 0/1 0 0 0 00・Bit 0-2: Fixed [0] *Reserved bit: Camera address(0-7)・Bit 3: Fixed [0] *Reserved bit: During broadcasttransmissions・Bit 4: Fixed [0]・Bit 5: During query commands [0], during settingscommand [1]・Bit 6: During settings/query [0], during response toquery [1]Terminator Format⁃Bit 7(MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0(LSB)Bit 11 1 1 1 1 1 11・Bit 0-7: Fixed [1]Message Format⁃Bit 7(MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0(LSB)Bit 10 0/1 0/1 0/1 0/1 0/1 0/10/1・Bit 0-6:Refer to the various commands (0-127)・Bit 7: Fixed [0]Checksum Format⁃Bit 7(MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0(LSB)Bit 10 0/1 0/1 0/1 0/1 0/1 0/10/1・Bit 0-6: Take the value that sets the lower 7 bits ofthe values added from the header to thechecksum to 0.・Bit 7: Fixed [0]Response Command Format⁃Bit 7(MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 0(LSB)Bit 11 1 1 1 0/1 0/1 0/10/1・Bit 0-3: ACK(Ah) / NACK(Bh) / ERR(Ch)・Bit 4-7: Fixed [1]・ACK: This is the response when the process of thereceived command is correctly completed afterreceiving the data in the correct format.・NACK: This is the response when data is received in anincorrect format.・ERR: Although the data is received in the correct format,this is the response when the process regardingthe received command is incorrect or cannot beconducted.Communications Protocol