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RS-232C Interface
4) Command list
Key commands
Data transmitted by
personal computer
[STX] OSP [ETX]
Data received in
response from VTR
[STX] OSP [ETX]
Description of operation
All the VTR’s operations are stopped, and the VTR is set to
the stop mode.
Cassette is ejected.
Send
command
OSP
(STOP)
OEJ
(EJECT)
OPL
(PLAY)
ORW
(REWIND)
OFF
(FAST
FORWARD)
OPA
(PAUSE)
ORC
(REC)
ORP
(REC
PAUSE)
OAF
(ADVANCE
FIELD)
OAR
(ADVANCE
REVERSE
FIELD)
[STX] OEJ [ETX] [STX] OEJ [ETX]
Playback is commenced.
[STX] OPL [ETX]
[STX] OPL [ETX]
The tape is rewound.
[STX] ORW [ETX][STX] ORW [ETX]
The tape is fast forwarded.
[STX] OFF [ETX] [STX] OFF [ETX]
[STX] OPA [ETX]
This is the pause or pause release command.
When the VTR is in the playback mode, it is set to the still-
picture playback (STILL); when it is in the recording mode,
it is set to the pause (REC PAUSE) mode. The VTR’s
previous mode is restored when this command is sent
again.
Recording is commenced.
[STX] OPA [ETX]
[STX] ORC [ETX] [STX] ORC [ETX]
[STX] ORP [ETX]
The recording pause (REC/PAUSE) mode is established
when the VTR is in the still-picture playback (STILL),
playback or recording mode. When this command is sent
again, the recording mode is established.
When the VTR is in the still-picture playback (STILL), the
tape is advanced frame by frame in the forward direction.
When the VTR is in the still-picture playback (STILL), the
tape is advanced frame by frame in the reverse direction.
[STX] ORP [ETX]
[STX] OAF [ETX]
[STX] OAR [ETX]
[STX] OAF [ETX]
[STX] OAR [ETX]
Status command
Send
command
QOP
(OPERATION
MODE)
Data transmitted by
personal computer
[STX] QOP [ETX]
Data received in
response from VTR
[STX]
[ETX]
Description of operation
This command inquires as to the operation mode of the
VTR. The VTR returns one of the following codes in
response to the QOP command.
VTR operation mode
STOP
EJECT
FF
REW
PLAY
STILL
RECORD
REC PAUSE
Code
OSP
OEJ
OFF
ORW
OPL
OPP
ORC
ORP
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