Serial command codes – 3M MP8740 User Manual

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Multimedia Projector MP8740

TECHNICAL

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 for the MP8740, 1) ASK, 2) REPLY, 3) SET and 4) DEFAULT.
Ask Code:
User:

XX is the attribute you are checking.
Projector:

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:

Y bytes of data

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

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:

XX is the attribute you are checking.
Projector:

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.

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