Eiki LC-XNB4000N Service Manual page 70

2. RS232 Command
-RS232 Control
-Communication Protocol
Standard Baud rate
Data length
Parity
Stop bit
Flow Control
-RS232 Cable Define
RX 2
TX 3
GND 5
- Communication
1. The Projector command is defined one command/one line that starts " C" and ends carriage
return CR .
2. There are two types of command, functional execution commands and status read commands
3. Response for status read command after accepting has different characters.
Example:
A. Functional execution command:
Power ON command is sent to the projector with "C00" CR, the projector returns a *ACK CR
or NAK CR code
PC Projector "C" "0" "0" CR
Projector
B. Status read command:
Power Status command is sent to the projector with "CR0" CR, the projector returns a
power status plus CR or NAK CR code
PC Projector "C" "R" "0" CR
Projector
Items
PC side
PC
PC processing command "0" "0" "0" (or NAK) CR
9600 bps
8 bits
None
1 bit
None
Projector side with D-sub pin
RX 3
TX 2
GND 5
processing command ACK (or NAK) CR
71
Specification