JVC DT-V1900CG  HOW to USE the RS-232C Terminal, Cable, Communications Specifications, Commands

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)

9	5
	4
8
	3
7
	2
6
	1

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
D	Command for adjusting the picture size	00	~ 08
S	Command for adjusting the picture quality	00	~ 05
M	Command for selecting the menu item	00	~ 0E
F	Command for selecting the menu item	00	~ 0A
W	Command for adjusting the white balance	00	~ 05
C	Command for inquiring for the monitor’s status	00

During Communication from the PC to the Monitor

Pin No.	Signal
1	DCD (Data Carrier Detect)
2	RD (Receive 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)

00, 01 or No data

–20 ~ +20 or –31 ~ +31

–20 ~ +20

00, 01, 10, 11

00, 01

–256 ~ +255

0 ~ 655

ENGLISH

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.

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