8
DVR Commands.
1.
PLAY FROM
-. This command causes the DVR to play from the specified time point. It will also
cause a jump to the new time point if already playing. A special case is PLAY FROM - 00:00:00:00,
this should ONLY be used after a PAUSE command since it causes the DVR to resume playing from
its current position. If you wish to start playing from the beginning of the hard disc then use PLAY
FROM - 00:00:00:01 and this will begin at the second frame on the disc.
2.
WAIT UNTIL
-. This command should ONLY be used when the DVR is in PLAY. It causes the
DVR to wait until a frame time point equal to, or greater than, that specified is encountered, at which
point the programme will continue to the next step. Obviously, if the DVR is not playing then the
controller will wait indefinitely.
3.
PAUSE AT
-. This command causes the DVR to jump to the specified time point and pause with a
freeze frame displayed. The command will be executed wether the DVR is in play, pause or stopped.
There are many uses for this command amongst the most common are to create a slide show, or to
display a still image containing ‘soft buttons’ for the TOUCH SCREEN controller. The special case of
PAUSE AT - 00:00:00:00 is useful as it causes the DVR to pause at its current time point without
having to specify the exact time. You should only use the special case at a point where you know the
DVR is playing i.e. don’t use it as the first play/pause command in a sequence.
4.
WAIT FOR -
. This command causes a simple wait for a specified number of frames. This is the
safest and simplest way to provide a delay, it does not require the DVR to be playing and will count
frames even if the DVR is stopped e.g. if you needed a delay to control the RELAY BOX without the
DVR playing, you can use ‘WAIT FOR’. It is also used to keep the DVR in PAUSE for a set time.
5.
HALT AT
-. This command will cause the sequence to end when a time point equal to, or greater
than that specified is encountered e.g. HALT AT - 00:10:00:00 will cause the sequence to halt when a
frame number >= 00:10:00:00 is encountered. The special case of HALT AT - 00:00:00:00 will
immediately halt the sequence. The DVR will then also exit the automatic operation mode and will not
start again until a sequence number is started manually.
6.
GO TO SEQUENCE
-
. This command will cause an immediate jump to the start of the next
sequence specified e.g. GOTO SEQUENCE 01 will jump to the start of sequence 01.
7.
SEQ BUTTONS
-. This command is used at the start of a sequence to enable/disable any of the 8
sequence buttons. If the command does not appear in a sequence then it is assumed that all 8 sequence
buttons are enabled. The main purpose of the command is to allow or disallow re-entry of a sequence
once started i.e. assume sequence 01 has the command to disable button 1, then once sequence 01 is
started, it cannot be re-started with button 1 until the sequence ends.
8.
RECORD FROM
-. This command will cause the DVR to begin recording from the specified time
point, provided the DVR is in ‘STOP’ or ‘PAUSE RECORD’ mode. The command is included to
allow timed recording i.e. you precede the command with a WAIT DATE/TIME or WAIT FOR
command and then the recording will begin at a specified time.