Using The Serial Communication - JVC DT-V20L3G Bedienungsanleitung

External Control

7 Using the serial communication

You can control the monitor from a personal computer etc. via the RS-485 or RS-232C terminal.
• Consult your dealer for the details of the external control specification.
<Communication specifications>
Input
Cable
terminal
RS-485 A straight LAN cable
RS-232C A straight cable with a D-sub
9-pin connector (male for the
monitor, female for the personal
computer etc.)
<Specifications of the RS-485 terminal>
Pin No. IN terminal signal
1 TXD +
2 TXD –
3 RXD +
4 NC
This is a female terminal.
5 NC
6 RXD –
7 NC
8
GND
<Specifications of the RS-232C terminal>
Pin No.
1 NC
2 RXD
3 TXD
4 NC
5 GND
This is a female terminal.
6 NC
7 RTS
8 CTS
9 NC
• The 7th terminal and the 8th terminal are connected.
(cont.)
Terminal
Communication specifications
specification
Baud Rate: 4800 bps
Data Bits: 8 bits
Parity: No parity
☞ See below
Stop Bits: 1 bit
Flow Control: No control
Communication Code: ASCII Code
OUT terminal signal
TXD +
TXD –
RXD +
NC
NC
RXD –
NC
GND
Signal
<Command outline>
All commands consist of the following segments.
Header Monitor ID Command ID
On Header
"!": Operation commands from the personal computer, etc. (☞ <Basic command list> on page 23).
"?": Reference commands from the personal computer, etc.
"@": Status returns from the monitor
To start communication, send the connection command from the personal computer etc.
To terminate the communication, send the termination command from the personal computer etc.
Example of communication procedures
1Starting the communication:
connection command (!00BCN1Cr)
2Monitor's status (@00BOKCr)
3Selecting "SDI 1" input (!00BINACr)
4Monitor's status (@00BOKCr)
PC, etc.
5Terminating the communication:
termination command (!00BCN0Cr)
6Monitor's status (@00BOKCr)
Function Data Cr (0Dh)
Monitor
22