JVC DT-V1710CG Instructions Manual page 22

How to Use the External Control
7How to Use the RS-485 Terminal
You can control the monitor from your PC via the RS-485 terminal. For details on operating the monitor from the
PC, consult the service center.
1. Cable
Prepare a straight cable with a D-sub connector (9-pin, male)
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 bit
Communication Code: ASCII Code
3. Commands
Format
Header ID Command ID Command Content 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
D Command for adjusting the picture size
S Command for adjusting the picture quality
M Command for selecting the menu item
F Command for selecting the menu item
W Command for adjusting the white balance
C Command for inquiring for the monitor's status
Communication Procedures
The following is the communication procedures.
1. Starting the communication
Receives the connection command (!XXBCN1Cr) from the PC = Sends the monitor's status (@XXBOKCr) to the PC
2. Performing the external control
Receives the control command (!XXXXCr) from the PC = Sends the monitor's status (@XXBOKCr) to the PC
* The monitor repeats these receiving and sending if necessary.
3. Terminating the communication
Receives the termination command (!XXBCN0Cr) = Sends the monitor's status (@XXBOKCr) to the PC
* Hand-shake communication is used. This means that after sending a command to the monitor, the PC must receive a
status return from the monitor before sending the next command.
* When the monitor is controlled by a PC via RS-485, a conversion adapter (RS-232CÔRS-485) is also required.
22
9
8
7
6
Pin No. IN terminal
signal
1 5 V power*
2 TD+
3 RD+
4 NC
5 NC
6 NC
7 TD–
8 RD–
9 NC
* The 5V power supply of the 1st terminal is for the controller
exclusively for this monitor. Do not use it for other devices.
Characters 00, 01 or No data
00-08 U, D (U: UP, D: DOWN)
00-05 U, D (U: UP, D: DOWN)
00-0E 00, 01, 02, 03
00-10 00, 01, 02, 03, 04, 05
00-05 U, D (U: UP, D: DOWN)
00 0-655
(cont.)
5
4
3
2
1
OUT terminal
signal
NC
TD+
RD+
NC
NC
NC
TD–
RD–
NC