Pioneer PDP 427CMX technical manual Interface, Rxd Txd Cts, Txd Rxd Rts Gnd Cts

RS-232C Adjustment

5.5.2 Interface

1)Connector

D-sub 9 pins (male/straight)

2)Pin layout

Pin No.	Signal	Pin No.	1	5
			Signal
1	NC (not connected)	6	NC (not connected)
2	TxD (Transmit Data)	7	NC (not connected)
3	RxD (Receive Data)	8	RTS (Request To Send)
4	NC (not connected)	9	NC (not connected)
5	GND
			6	9

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
	Control PC		Control PC
(with D25 serial port )		Plasma Display	(with D9 serial port)	Plasma Display

RXD 3	2
TXD 2	3
CTS 5	2
GND 7

2TXD

3RXD

8RTS

5GND

RXD 2	2
TXD 3	3
CTS 8	2
GND 5

2TXD

3RXD

8RTS

5GND

* D-sub 9-pin/D-sub 25-pin conversion tables are now available on the market. Straight Cable

6)Protocol

From the PC to the display

(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)

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