Marantz VP 12 S 1 Control Specification

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PC Control Specification for VP-12S1 2 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 : 0x0D Command Sample : "@PWR?", 0x0D (Request Power Status) Feedback Sample : "@PWR1", 0x0D, 0x0A(Power Status = On) ACK and NAK use the following control code. ACK(Reception success) :0x06, 0x0D, 0x0A NAK(Reception failure) :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: W hen 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.

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PC Control Specification for VP-12S1 3 Commands, such as Power On Command at the time of notes Standby (Fan operation), return only ACK, when processing is not carried out. For example: When Power On is sent to Projector. Command transmission from PC. "@PWR", 0x0D After Command processing end and from a projector to a reply 0x06, 0x0D, 0x0A (ACK reception success) or 0x15, 0x0D, 0x0A (NAK reception failure) 2.3. Request Status Command It is Command which demands Status. Projector returns Status or NAK. 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. For Example: W hen Power Status is requested to Projector. Command transmission from PC. "@PWR?", 0x0D After Command processing end and from a projector to a reply "@PWR1", 0x0D, 0x0A (Power On) or "@PWR0", 0x0D, 0x0A (Standby) or 0x15, 0x0D, 0x0A (NAK reception failure)