Panasonic AJ-D230H Benutzerhandbuch

Asynchronous, full duplex

1200/2400/4800/9600/19200

8 bit/7 bit

1 bit/2 bit

NONE/ODD/EVEN

The factory settings are 9600 bps, 8 bits, 1 stop bit, and none for the parity.

[STX] [discrimination] [:] [data] [ETX]

02H

XX  XX  XX

3AH XX   XX 03H

20H<XX<7FH

(XX = hexadecimal character code)

discrimination

: This is the command identifier (3 bytes).
: This code serves as the delimiter between a command and data.

data

: Data codes are added when necessary.

1. A send command must always start with STX (character code 02H).

The ‘discrimination’ which follows next is the command identifier. If necessary, data is added after the
colon (" : ").

At the very end comes ETX (character code 03H).

2. When STX is re-sent before ETX is sent, the receive buffer inside the VTR is cleared (all data received

up to that moment will be lost), and the data is processed again with the re-received STX placed at the
head.

The VTR responds to a send command with data in the following format.

1. First, the VTR returns the data which acknowledges whether the command from the computer was

received properly.

1) The VTR returns the ACK data if communication was error-free.

[ACK]

06H

2) It returns data starting with NAK (negative acknowledge; character code 15H) if an error occurred in

communication.

[NAK]

15H

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