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RS-232C Adjustment
5.5.2 Interface
1) Connector
D-sub 9 pins (male/straight)
2) Pin layout
3) Baud Rate
9 600 bps (standard)
(switch-able to 1 200, 2 400, 4 800, 19 200, 38 400 bps)
Note
The baud rate of this display should be set to match the baud rate of the PC.
Also, when the RS-232C cable is extended over a long distance, use a slower baud rate.
4) Data format
Start bit: 1 bit
Data bit: 8 bit
Parity: no
Stop bit: 1 bit
5) Connection
6) Protocol
From the PC to the display
Straight Cable
* D-sub 9-pin/D-sub 25-pin conversion tables are now available on the market.
Control PC Control PC
(with D25 serial port ) Plasma Display (with D9 serial port) Plasma Display
2
2
3
2
3
2
RXD 3 2 TXD RXD 2 2 TXD
TXD 2 3 RXD TXD 3 3 RXD
CTS 5 8 RTS CTS 8 8 RTS
GND 7 5 GND GND 5 5 GND
5
96
1
Pin No.
Signal
1 NC (not connected)
2 TxD (Transmit Data)
3 RxD (Receive Data)
4 NC (not connected)
5 GND
Pin No.
Signal
6 NC (not connected)
7 NC (not connected)
8 RTS (Request To Send)
9 NC (not connected)
(1) Sending one command at a time:
STX (02 hex) ID (2 Byte) COMMAND (3 Byte or 6 Byte) ETX (03 hex)
(2) Sending numerical direct commands:
STX (02 hex) ID (2 Byte) COMMAND (3 Byte) ARGUMENT (3 Byte) ETX (03 hex)
ID, COMMAND, ARGUMENT are transmitted as ASCII characters.
From the display to a PC
(1) Echo back (Normal response)
Command received and returned but the ID is not returned.
STX (02 hex) COMMAND (3 Byte or 6 Byte) ETX (03 hex)
Received command is a numerical direct effect command and numerical data is returned:
STX (02 hex) COMMAND (3 Byte) ARGUMENT (3 Byte) ETX (03 hex)
(2) Error (Abnormal response)
Received command is a non-corresponding command, ‘ERR’ is returned:
STX (02 hex) ERR (3 Byte) ETX (03 hex)
Received command cannot be processed (when PON is received when the power is already ON, etc.), ‘XXX’ is
returned:
STX (02 hex) XXX (3 Byte) ETX (03 hex)