Panasonic AJ-D850P manual Software specifications, Protocol

3. Software specifications

Protocol

1) Communication parameters

Communication system	Asynchronous, full duplex
Communication speed	300/600/1200/2400/4800/9600
Bit length	7 bit/8 bit
Stop bit	1 bit/2 bit
Parity bit	NONE/ODD/EVEN
ACK code	ACK code returned/ACK code not returned
	<Note>
	The ACK code is what is returned from the VTR to the controller when data has
	been successfully sent from the controller.

The underlining indicates the factory settings.

Any changes to the settings can be made using the setup menu items listed below.

Communication parameter	Setup menu item
Communication speed	No. 205 BAUD RATE
Bit length	No. 206	DATA LENGTH
Stop bit	No. 207	STOP BIT
Parity bit	No. 208	PARITY
ACK code	No. 209 RETURN ACK

2) Send format [controller (PC) → VTR]

■Data format

[STX]	[command] [:] [data]	[ETX]	←(ASCII code: symbols, numbers upper-case letters)
02h	XX XX XX 3Ah XX-XX	03h

20h<XX<7Fh

• [command]: Command identifier; a 3-byte identifier (ASCII code: symbols, numbers, upper-case letters) is sent as the

	command.
• [ : ]:	This code serves as a delimiter between the command and data.
• [data]:	Data (ASCII code: symbols, numbers, upper-case letters) can be added in the number of bytes required.

■Outline of send procedure from controller

1.The send command starts with STX (start of text = 02h). The command is then identified by COMMAND which follows and the data is added as required.

The format ends with ETX (end of text = 03h).

2.When a different command is to be sent, a response is awaited from the VTR, and then the command is sent. (See page 94.)

3.If STX is sent again before ETX is sent, the receive data buffer inside the VTR is cleared. A command error is returned to the controller, and the data is newly processed with STX which was received again at the head.

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