3M MP8670 用户手册
3M
™
Multimedia Projector MP8670
© 3M 1999
TECHNICAL
A-10
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.
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:
Ask Code:
User:
20
XX
XX is the attribute you are checking.
Projector:
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:
The XX is the same as in the Ask code.
Set Code:
User:
3Y
XX
Y bytes of data
XX is the attribute you are checking. The Y is the number of bytes for the data.
Projector:
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.
The XX is the same as in the Set code.
Default Code:
User:
User:
40
XX
XX is the attribute you are checking.
Projector:
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.
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.
For an error, the projector will reply with the same code that was sent but with a 0 in the first nibble.