Hitachi CPX275W RS-232C communication, Communications setting, Protocol, Header, Command data

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TECHNICAL (continued)

RS-232C communication

(1)Turn off the projector and computer power supplies and connect with the RS-232C cable.

(2)Turn on the computer power supply and after the computer has started up, turn on the projector power supply.

	Projector
Control jack		2
D-sub 15-pin shrink jack	SELORTS109345678
1510149138127116	GND	2
	RDT	43
		15

Computer		RS-232C jack
2	RD	D-sub 9-pin
3456789	TDGNDDRITRSRTS	162738495

Communications setting

19200bps, 8N1

1 Protocol

Consist of header (7 bytes) + command data (6 bytes).

2 Header

BE + EF + 03 + 06 + 00 + CRC_low + CRC_high

CRC_low : Lower byte of CRC flag for command data.

CRC_high : Upper byte of CRC flag for command data.

3 Command data

Command data chart

byte_0		byte_1	byte_2		byte_3	byte_4		byte_5

Action				Type		Setting code
low		high	low		high	low		high
low		high	low		high	low		high

		Action (byte_0 - 1)
Action	Classification		Content

1	SET		Change setting to desired value.

2	GET		Read projector internal setup value.

4	INCREMENT		Increment setup value by 1.

5	DECREMENT		Decrement setup value by 1.

6	EXECUTE		Run a command.

TECHNICAL

TECHNICAL - 5

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Contents CPX275W Contents Features Contents of packageBefore USE Front / Left View Before USEPart Names Rear / Right ViewFirst Loading Remote ControllerLoading the Batteries ReplacingAngle Adjustment InstallationInstallation of the Projector and Screen Installation ReferenceInstallation CablingCabling Power Connection Example of system setupPlug & Play Operations Power onPower OFF StandbyOperations Basic OperationBasic Operation Description Automatic Adjustment at Video Input Press the Auto button Set/Clear Mute Mode Press the Mute buttonAutomatic Adjustment at RGB Input Press the Auto button Menu Display Start/Stop Press the Menu buttonSelect Image Aspect Ratio Setup MenuSetup Menu Select Position of ImageInput Menu Input MenuImage Menu Setup Initial Screen Display Select Turn on withSelect Color Temperature Image Menu DescriptionSelect Menu Background Color Select with Options MenuOptions Menu Description Select Menu Display Language Select withSetup Initial Screen Display Select the Turn on with No Signal MenuNo Signal Menu Select Blank Screen Color Select the color withLamp MaintenanceLamp Lamp LifeMaintenance Resetting the Lamp TimerReplacing the Lamp Maintenance Inside the Equipment Air Filter MaintenanceOther Maintenance Cleaning the LensOSD Message TroubleshootingMessage Contents OSD MessagesIndicators Message TroubleshootingIndicators Message IndicatorSymptom SymptomSymptom Possible cause Remedy Specifications SpecificationsWarranty and AFTER-SERVICE Page Sub 15-pin Shrink Connector RGB Dimension DiagramSignal Connector Pin Assignment Mini Din 4-pin Connector S-VIDEOExample of computer signal TechnicalInitial set signals Connection to the Mouse Control RS-232C communication Communications settingCommand data ProtocolUsing the projector default settings Reset Command Requesting projector status Get commandChanging the projector settings Set command Increasing the projector setting value Increment commandCRC Be EF BA D2 Be EF FD D3 Be EF Ntsc PAL Regulatory Notices FCC Statement WarningFor the Customers in Canada Pour les utilisateurs au Canada Hitachi