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HOW TO USE EXTERNAL
CONTROL
(cont.)
Ⅵ HOW TO USE THE RS-232C TERMINAL
You can control the monitor from your PC via the RS-232C terminal.
For details on operating the monitor from the PC, consult your dealer or service centre for details.
1. Cable
Prepare a straight cable with a D-sub connector (9-pin, female) and a D-sub
connector (9-pin, male)
2. Communications Specifications
Baud Rate : 4800/9600/19200 (factory pre-set; 4800)
Data Bits : 8 bits
Parity : No parity
Stop Bits : 1
Flow Control : Hardware (RTS/CTS)
3. Commands
Format
Header ID Command Data CR
Header
! Control from the PC to the monitor
? Reference from the PC to the monitor
@ Answer from the monitor to the PC
ID + Command + Data
B Basic command Characters 00, 01 or No data
D Command for adjusting the picture size 00 ~ 07 –20 ~ +20
S Command for adjusting the picture quality 00 ~ 05 –20 ~ +20
M Command for selecting the menu item 00 ~ 0E 00, 01, 10, 11
F Command for selecting the menu item 00 ~ 07 00, 01
W Command for adjusting the white balance 00 ~ 05 –256 ~ +255
C Command for inquiring for the monitor’s status 00 0 ~ 655
During Communication from the PC to the Monitor
The monitor receives the data when DSR remains ON (high) and CTS is set to ON.
During Communication from the Monitor to the PC
The monitor sends the data when both DSR and DCD are set to ON and RTS is set to ON.
Communication Procedures
The following is the communication procedures.
1. Starting the communication
Receives the connection command (!BCN1Cr) from the PC [ Sends the monitor’s status (@BOKCr) to the PC
2. Performing the external control
Receives the control command (!XXXXCr) from the PC [ Sends the monitor’s status (@BOKCr) to the PC
* The monitor repeats these receiving and sending if necessary.
3. Terminating the communication
Receives the termination command (!BCN0Cr) [ Sends the monitor’s status (@BOKCr) to the PC
* After sending the data to the monitor, the PC must first receive the data from the monitor and then send the next command
because the communication is performed in a hand-shake system. If the PC does not receive the status from the monitor after
sending the command, re-send the command.
4
3
2
1
9
8
5
7
6
Pin No. Signal
1 DCD (Data Carrier Detect)
2 RD (Recive Data)
3 TD (Transmit Data)
4 DTR (Data Terminal Ready)
5 GND (Ground)
6 DSR (Data Set Ready)
7 RTS (Request To Send)
8 CTS (Clear To Send)
9 RI (Ring Indication)
18