Dell 1800MP User Manual
DellTM 1800MP RS232 Protocol Pin Assignment
(Facing Projector)
RS232 Pin Assignment
RS232 Protocol
• Communication Settings
Connection settings Va lu e
Baud Rate: 19200
Data Bits: 8
Par ity No ne
Stop Bits 1
• Command types
To pop up the OSD menu and adjust the settings.
• Control command Syntax (From PC to Projector)
[H][AC][SoP][CRC][ID][SoM][COMMAND]
• Example: Power ON Command (Send low byte firstly)
--> 0xBE, 0xEF, 0x10, 0x05, 0x00, 0xC6, 0xFF, 0x11, 0x11, 0x01, 0x00, 0x01
Header "BE EF"
Address Code "10" ==> Fixed
Payload Size "05 00"==> From wMsgID to end
CRC "C6 FF" ==> If CRC value is "C6 (Low Byte) FF (High Byte)"
MsgID "11 11"
MsgSize "01 00"==> From command to end.
Command "01"==> "Power ON" command.
• Projector Response Message Table:
0x00: Success
0x01: Invalid command (on the control command list but not valid. e.g. card reader
command while no card reader plug-in)
0x02: Error command (includes CRC error and unknown commands).
0x03: System Status - Projector ON (Normal Mode).
NACK: System Status - Projector OFF (Standby Mode).
Note: When the projector is in the standby mode, no acknowledgement (NACK)
response is sent by the projector.
• Projector Response Lamp Hour:
Byte0, Byte1, Byte2, Byte3
Byte0: 0x00 (Success)
Byte1: 0x2F (the header of lamp hour)
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Byte2: LSB (Hex)
Byte3: MSB (Hex)
Ex: 800 (3x256+2x16=800) hours --> 0x00, 0x2F, 0x20, 0x03
• Firmware version Response:
Firmware version: 4 Bytes ASCII Code: "V*.*"
V: Ve r si o n
*: 0-9
• Example: Version 1.5 --> "V1.5" --> 0x00, 0x30, 0x56, 0x31, 0x2E, 0x35 (Success,
header of firmware version, 4 Bytes ASCII Code: "V*.*")
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