51 ENGLISHUsing the serial terminalsPin assignments and signal namesCommunication conditions (Factory setting)Basic formatTransmission from the computer begins with STX, then the ID, command, parameter, and ETX are sent in thisorder. Add parameters according to the details of control.The main unit is equipped with SERIAL terminals located in its terminal section on the side, and this terminal iscompliant with RS-232C. Also a serial output terminal is provided to enable plural projector control.Examples of connectionSingle projector Plural projectorsPCD-Sub 9-pin(male)Communication cableD-Sub 9-pin(male)D-Sub 9-pin(female)Communication cable D-Sub 9-pin(female)D-Sub 9-pin(female)D-Sub 9-pin(male)D-Sub 9-pin(male)Start(1 byte) ID designate3 commandcharacters (3 bytes)Parameter(undefined length)End(1 byte)2 IDcharacters(2 bytes) Semicolon(1 byte)Colon(1 byte)ZZ, 1 to 64 and 0A to 0ZSTX C1 C2 C3 : P1 P2 … Pn ETXA D I 1 I 2 ;(2 bytes)• If a command is sent within about 60 seconds after the lamp is turned on, the response may bereturned late or the command may be unable to be executed. Try sending and receiving commandsafter 60 seconds has elapsed.• When sending several commands, be sure to wait for more than 0.5 seconds after receiving aresponse from the projector, and then send the next command. When sending commands withoutparameters, a colon (:) is not necessary.Attention• If a command cannot be executed, the projector will send an “ER401” response to the computer.• If an invalid command is received, the projector will send an “ER402” response to the computer.• Projector ID supported on the RS-232C interface is ZZ (ALL) and a group of 1 to 64 and 0A to 0Z.• If a command is sent with a projector ID specified, the projector will return answer back only in the following cases:if it coincides with the projector ID,ID specification is ALL and VPS-SYSTEM is the master, orID specification is group and Group is the master.• In the hexadecimal format, STX has the character code 02 and ETX the character code 03.NotePCD-Sub 9-pin (female)D-Sub 9-pin (male) Communication cableD-Sub 9-pin (female),external appearanceSerial input terminalPin No. Signal nameTXDRXDGNDCTSRTSDescriptionNCSend dataReceive dataConnected internallyGroundNCConnected internallyNCD-Sub 9-pin (male),external appearanceSerial output terminalPin No. Signal nameRXDTXDGNDRTSCTSDescriptionNCReceive dataSend dataNCGroundNCConnected internallyNCSignal levelSynchronization methodBaud rateParityCharacter lengthStop bitX parameterS parameterRS-232C compliantStart-stop synchronization9 600 bpsNone8 bits1 bitNoneNone