Panasonic AJSD955A--Video Cassette Recorder user manual download

For Devices:Panasonic AJSD955A--Video Cassette Recorder
Languages:English
Pages:80
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Page 70 of 80
70
Software specifications (Protocol)
1.Communication parameters
RS-232C interface
Communication
system
Asynchronous, full duplex
Communication
speed
300/600/1200/2400/4800/9600
Bit length
7bit/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.
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
Any changes to the settings can be made using the
setup menu items listed below.
2.Send format
[controller (PC)
5
VTR]
$
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] :
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
72.)
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.
Sample