74Pin assignments and signal namesThe 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 projectorsStart(1 byte) ID designate3 commandcharacters (3 bytes)Parameter(undefined length)End(1 byte)Two 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)AttentionNotePCD-Sub 9-pin (female)D-Sub 9-pin (male) Communication cableSERIALIN OUTRS-232C (G)RS-422 (R)RS-232C (G)RS-422 (R)D-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 600bpsNone8 bits1 bitNoneNonePCD-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)SERIALIN OUTRS-232C (G)RS-422 (R)RS-232C (G)RS-422 (R) SERIALIN OUTRS-232C (G)RS-422 (R)RS-232C (G)RS-422 (R)• When the wrong command is sent, the "ER401" or "ER402" status is sent from the projector to thepersonal 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 thefollowing 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.• No command can be sent or received for 10 to 60 seconds after the lamp starts lighting. Trysending any command after that period has elapsed.• When sending several commands, be sure to wait for a response from the projector before sendingthe next command. When sending commands without parameters, a colon (:) is not necessary.Communication 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.Using the serial terminals
