Marantz VP-12S3 Marantz RC codes All PJ - Page 2

RS232C Control Specification for VP-12S3 1. PC Control Interface * RS-232C(Straight Cable) * Baud rate 9600 bps * Data length 8 bits * Parity None * Stop bit 1 bit * Flow Control RTS/CTS * Communication procedure Full duplex 2. PC Control Command Reference 2.1. Command Communications Sequence Projector returns ACK, NAK, or Status after reception of Command within 1 second. An ASCII code is used for data. It is discriminated whether transmitting character sequences are a capital letter and a small letter. Although there is no distinction of a capital letter small letter, let a capital letter be a standard. Command transmission and Status reply add Start Character and End Character as follows. Start Character : End Character : Command Sample : Feedback Sample : '@' 0x0D "@PWR?", 0x0D "@PWR1", 0x0D, 0x0A (Request Power Status) (Power Status = On) ACK and NAK use the following control code. ACK(Reception success) NAK(Reception failure) :0x06, 0x0D, 0x0A :0x15, 0x0D, 0x0A A reception side cancels data before '@'. When 0x0D comes, with '@' not coming, NAK (reception failure) is returned. That which made Hex the ASCII code is used for transmission and reception of digital data. Between a command and a numerical value, '/' is inserted as a delimiter. For Example: When 26(decimal) of the number is expressed '1', 'A' → 0x31, 0x41 2.2. Normal Command It is Command which demands processing. In data other than an appointed command, or the state where '@' does not come, when 0x0D comes, it becomes reception failure, and NAK is returned. 2