Panasonic PT-L720E Operating Instructions Manual

Also see for PT-L520E: Service manual

ENGLISH-45 Advanced Operation44-E NGLISHUsing the SERIAL connectorThe serial connector which is on the side connector panel of the projectorconforms to the RS-232C interface specification, so that the projector can becontrolled by a personal computer which is connected to this connector.ConnectionNOTE:B Use a proper communicationcable which is suitable for thepersonal computer to connect theserial connector and the personalcomputer.Pin layout and signalnames for SERIALconnectorD-Sub9p (male)Communication cableSERIAL(female)ComputerBasic formatThe data sent from the computer tothe projector is transmitted in theformat shown below.NOTE:B The projector can not receive thecommand for 10 seconds afterthe lamp is switched on. Wait 10seconds before sending thecommand.B If sending multiple commands,check that a response has beenreceived from the projector forone command before sending thenext command.B When a command which doesnot require parameters is sent,the colon (:) is not required.B If an incorrect command is sentfrom the personal computer, the“ER401” command will be sentfrom the projector to the personalcomputer.PinNo.Communications settingsSignalname Contents1 56 9# NC$ TXD Transmitted data% RXD Received data& NC' GND( DSR) CTS Connected internally* RTSNC+D-SUB 9-pin connector seen fromoutsideSignal level RS-232CAsynchronousSync. methodBaud rateParity9600 bpsNoneCharacter length 8 bitsStop bit 1 bitX parameter NoneS parameter NoneSTX Command : Parameter ETXControl commandsThe commands which the personal computer can use to control the projectorare shown in the following table.Start byte(02h) 3 bytes1 byte1 byte–5 bytesEnd byte(03h)Command ControlContents RemarksIn standby mode, all commands other thanthe PON command are ignored.B The PON command is ignored duringlamp ON control.B If a PON command is received while thecooling fan is operating after the lamphas switched off, the lamp is not turnedback on again straight away, in order toprotect the lamp.Power ONPONPower OFFPOFVolumeAVL Parameter000–063(Adjustment value 0–63)Input signalselectionIISParameterVID=VIDEO SVD=S-VIDEORG1=RGB1(YP B PR1) RG2=RGB2(YPBPR2)Lamp ONcondition queryQ$SParameter0 = Standby1 = Lamp ON control active2 = Lamp ON3 = Lamp OFF control activeCable specifications(When connected to a personal computer)123456789123456789NCNCNCNCNCNCNCNCAt the projector At the computer(DTE specifications)