Panasonic AJ-HD1700 manual Software specifications protocol, Send format, Controller PC

RS-232C interface

Software specifications (protocol)

1.Communication parameters

Communication	Asynchronous, full duplex
system
Transfer rate	300, 600, 1200, 2400, 4800 or 9600				bps
Bit length	7 bits or 8 bits
Stop bit	1 bit	or 2 bits
Parity bit	None		, odd or even
ACK code	Returned			or not returned
	<Note>
	ACK is the code which is returned from the
	VTR to the controller when data has been
	successfully sent from the controller.

The underlining (__) denotes the factory setting mode.

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

Communication	Setup menu item
parameter
Transfer rate	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	> VTR]
[controller (PC)

∫Data format

[STX]	[command]	[:]	[data]		[ETX]
02h	XX XX XX	3Ah XX	.....	XX	03h

20H<XX<7FH

(XX=ASCII code: symbols, numbers, upper- case letters)

[command]:

This is the command identifier (3 bytes).

A3-byte identifier (ASCII code: symbols, numbers, upper-case letters) is sent as the command.

[:]

The colon is the code serving 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 procedure for sending data from controller

1The 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 command ends with ETX (end of text =

03h).

2When a different command is to be sent, a response is awaited from the VTR, and then

the command is sent. (See page 124.)

3If 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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