3M Multimedia Projector X62w - Manual (Page 77)

77
Command format
Command formats differ among the different communication ports.
TCP #23
You can use the RS-232C commands without any changes. The reply data format
is the same as the RS-232C commands. However, the following reply will be sent
back in the event of authentication failure when authentication is enabled.
<Reply in the event of an authentication error>
Reply Error code
0x1F 0x04 0x00
TCP #9715
Send Data format
The following formatting is added to the header (0x02), Data length (0x0D),
Checksum (1byte) and Connection ID (1 byte) of the RS-232C commands.
Header
Data
length
RS-232Ccommand Checksum
Connection
ID
0x02 0x0D 13 bytes 1 byte 1 byte
Header → 0x02, Fixed
Data length → RS-232C commands byte length (0x0D, Fixed)
RS-232C commands → RS-232C commands that start with 0xBE 0xEF (13 bytes)
Check Sum
→ This is the value to make zero on the addition of the lower
8 bits from the header to the checksum.
Connection ID → Random value from 0 to 255 (This value is attached to
the reply data)
4. Utilize projector – Advanced -