173
RS-232C Adjustment
5.5.2 Interface
1) Connector
D-sub 9 pins (male/straight)
2) Pin layout
3) Baud Rate
9600 bps (standard)
(switch-able to 1200, 2400, 4800, 19200, 38400 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 to be extended over a long distance, a slower baud rate is recommended.
4) Data format
Start bit: 1 bit
Data bit: 8 bit
Parity:
no
Stop bit: 1 bit
5) Connection
6) Protocol
From the personal computer to the display
Straight Cable
* D-sub 9-pin/D-sub 25-pin conversion tables are now available on the market.
Control PC
Plasma Display
Control PC
Plasma Display
(with D25 serial port )
(PDP-425CMX/PDP-42MXE10)
(with D9 serial port)
(PDP-425CMX/PDP-42MXE10)
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
9
6
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) When sending one command at a time:
STX (02 hex)
ID (2 Byte)
COMMAND (3 Byte or 6 Byte)
ETX (03 hex)
(2) When numerical direct commands are possible:
STX (02 hex)
ID (2 Byte)
COMMAND (3 Byte)
ARGUMENT (3 Byte)
ETX (03 hex)
XXXXXXXXXXX.
From the display to the personal computer
(1) Echo back
(XXXXXXXX)
XXXXXXXXXXXX.
STX (02 hex)
COMMAND (3 Byte or 6 Byte)
ETX (03 hex)
When the received command is a numerical direct effect command, numerical data is returned.
STX (02 hex)
COMMAND (3 Byte)
ARGUMENT (3 Byte)
ETX (03 hex)
(2) Error
(XXXXXXXX)
When the received command is non-corresponding command, ‘ERR’ is returned.
STX (02 hex)
ERR (3 Byte)
ETX (03 hex)
When it is determined that the 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)
