JVC DT-V100CG Instructions Manual page 20

How to Use the External Control
How 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 RJ-45 connector.
2. Communications Specifications
Baud Rate:
Data Bits:
Parity:
Stop Bits:
Communication Cord: ASCII Cord
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.
20
4800/9600/19200 (factory pre-set; 4800)
8 bits
No parity
1 bit IN terminal
Pin No.
signal
1 TXD+
2 TXD–
3 RXD+
4
5
6 RXD–
7 5 V Power
8
* The 5V power supply of the 7th terminal is for the controller
exclusively for this monitor. Do not use it for other devices.
Characters 00, 01 or No data
00-0A, 10 U, D (U: UP, D: DOWN)
00-06 U, D (U: UP, D: DOWN)
00, 01, 03-11 00, 01, 02, 03
00-0F, 12, 13 00, 01, 02, 03, 04, 05
00, 02-06 U, D (U: UP, D: DOWN)
00 0-655
(cont.)
1 2 3 4 5 6 7 8
OUT terminal
signal
TXD+
TXD–
RXD+
NC NC
NC NC
RXD–
NC
GND NC