Dell C8618QT User Manual

Dell™ C5518QT/C8618QT RS232 Protocol Document

• RS232 Projector Pin Assignment (Facing Monitor)

• RS232 Serial Communication Cable Pin Assignment (Facing Cable)

Pin Assignments

RS232 PIN DESCRIPTION RS232

1 -

2 TXD 2

3 RXD 3

4 -

5 GROUND 5

6 -

7 Not Used 7

8 Not Used 8

9 -

Note 1: The RS232 (pin2-3 swap) cable is not provided by Dell.

• RS232 Protocol

Communication Settings

Connection Settings Value

Baud Rate 9600 bps

Data Bits 8 bits

Parity None

Stop Bits 1 bit

Flow control None

Control Command Syntax (From PC to Monitor)

[H0][H1][Len][R/W][Cmd][Data0]…[DataN][Chk]

[H0] = 0x37

[H1] = 0x51

[Len] = Length

[R/W] = Read/Write

Read = 0xEB

Write = 0xEA

[Cmd] = Command

[Data0]…[DataN] = Data0~N

[Chk] = Check Sum

Reply Command Syntax (From Monitor to PC)

[H2][H3][Len][Reply][RC][Cmd][Data0]…[DataN][Chk]

[H2] = 0x6F

[H3] = 0x37

[Len] = Length

[Reply] = Reply (0x02)

[RC] = Result Code

0 = Success

1 = Timeout

2 = Parameters Error

3 = Not connected

4 = Other Failure

[Cmd] = Command

[Data0]…[DataN] = Data0~N

[Chk] = Check Sum

Example: Get Monitor Name

[From PC to Monitor] = 37, 51, 02, EB, 01, 8E

[From Monitor to PC] = 6F, 37, 0F, 02, 00, 01, 44, 65, 6C, 6C, 20, 43, 35, 35, 31, 38, 51, 54, 1A

CheckSum calculation

Xor byte by byte from rst byte to the end of the command data stream.