3M MP7650, MP7750 2 Header, 1 Protocol, 3 Command data, 19200bps, 8N1, Command data chart, Action (byte_0 - 1)

3M™ Multimedia Projector MP7650/7750

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	Computer	RS-232C jack
Control jack		D-sub 9-pin
D-sub 15-pin shrink jack

Communications setting

19200bps, 8N11 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 dataCommand data chart

byte_0	byte_1	byte_2	byte_3	byte_4	byte_5
Action		Type		Setting code
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.

© 3M 2002. All Rights Reserved.

TECHNICAL

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