Samsung SPH700AE User Manual (ENGLISH) - Page 78

RS-232C Connection and Control Other Information Connecting the Projector to a PC You can connect the Projector to a PC using the RS232C (Crossed, Female Type) cable to control the projector. I Do not disconnect or connect the RS-232C cable while the Computer or the Projector is operating. It may cause serious damage to the Computer or the Projector. I If the PC is not properly configured, the RS-232C connection may not work properly. For further details, refer to the Computer's product documentation. Communication Format (Complies with the RS232C Standard) I Transmission Speed: 115,200 bps I Parity Bit: No I Data Length: 8 data bits, 1 stop bit Transmission Sequence and Data Format Transmission Sequence Argument 1 → Argument 2 → ----Argument N, Command, Response Structure for Variables (8 bytes) 0x08 0x11 N PN CS N : Variable's Number (Hexadecimal) PN : Value of the Variable (Implemented in 4 bytes - Hexadecimal) CS : Checksum (Boolean complementation of the summation of all bytes except the CS) Command Structure (4 bytes) CN 0x12 CC CS CN : Command + Number of Variables (Hexadecimal) CC : Command - Hexadecimal (Refer to the commands table) CS : Checksum (Boolean complementation of the summation of all bytes except the CS) Command Structure (4 bytes) - Confirms proper data transmission CN 0x12 CC CS - No response for communication errors or invalid commands I Transmit the following control command to transmit one or more control commands if there was a successful response for the previous transmission or there was no response in over 3 seconds. I While controlling the Projector using a Computer, you cannot check the Projector's status change using the Computer nor will it be displayed on the Projector's screen. Transmit the INFORMATION command to display the current information on the Projector's screen. 78 I All the control commands apply to the input source and the Projector's status currently displayed. RS-232C Connection and Control