Marantz SR5002 IR Database "xcf file" for Marantz AV Receiver Common - Page 6

SR5002 RS-232C Control Specification 3-2. Transmission data format 3-2-1. Transmission data format from Host to Slave There are two kinds of transmission data form from Host shown below. 3-2-1-1. Form1: Command Command is a data that requests some status change. Start character : '@' COMMAND : see "Command list" End character (CR) : 0Dh Start Command End @ "xxx:"+"..." 0Dh Page: 6 / 21 Document Version [1.00] 3-2-1-2. Form2: Status request Status request is a data that requests a answer of some status. Start character : '@' Request status : see "Status request list" Request character : '?' End character (CR) : 0Dh Start Command End @ "xxx:?"+"..." 0Dh 3-2-2. Transmission data format from Slave to Host There are two kinds of transmission data form from Slave shown below. 3-2-2-1. Form1: ACK/NAK ACK is a reply data from Slave when Slave got an acceptable command data from Host. (ACK is sent to Host when Slave has no related status by the Command.) Start character : '@', ACK : 06h, End character (CR) : 0Dh Start ACK End @ 06h 0Dh NAK is a reply data from Slave when Slave got an incorrect Command data, Status request data or some other data from Host. Start character : '@', NAK Start NAK End : 15h, End character (CR) : 0Dh @ 15h 0Dh 3-2-2-2. Form2: Status answer and Auto status feedback Status answers are reply data when Slave got an acceptable Request status or Command data from Host. Auto status feedbacks are send to Host data when a Slave's status is changed. Start character : '@' Answer character : see "Status list" End character (CR) : 0Dh Start Status End @ "xxx:"+"..." 0Dh Company Restricted