3M MP8770 manual Serial Command Codes

Serial Command Codes

All numbers in this document are in Hexadecimal. You must send at the same communication setting as the projector and use a null modem serial cable to connect to the projector.

There are four types of messages: 1) ASK, 2) REPLY, 3) SET and 4) DEFAULT. Ask Code:

User:

20

XX

XXis the attribute you are checking. Projector:

1Y

XX

Y bytes of data

This is a reply code. The Y is the number of extra bytes that come after the command. The XX is the same as in the Ask code.

Set Code: User:

3Y

XX

Y bytes of data

XXis the attribute you are checking. The Y is the number of bytes for the data. Projector:

1Y

XX

Y bytes of data

This is a reply code. The Y is the number of extra bytes that come after the command. The XX is the same as in the Set code.

Default Code:

User:

40

XX

XXis the attribute you are checking. Projector:

1Y

XX

Y bytes of data

This is a reply code. The Y is the number of extra bytes that come after the command. The XX is the same as in the Ask code.

Errors:

For an error, the projector will reply with the same code that was sent but with a 0 in the first nibble.

TECHNICAL

A-10

3M™ Multimedia Projector MP8755

© 3M 2000