Emergency recording
36
By clicking the [Measurement] button, you can check that the
specified rates provide proper operation on the network. A red rate
setting value indicates that live images or recording of the image
may not be possible at the specified rate.
Measurement takes about 90 seconds.
• When measurement results (total of all camera maximum
speeds) are greater than the recorder network speed, heavy
network traffic may cause dropping of recorded images, live
images, alarms, and other data, degraded operational response,
restarts, and other problems. (Guideline network speed: 12
8
Mbps)
• Even when measurement results do not exceed the above
guideline network speed, the number of connected cameras and
PCs can cause some of the phenomena described above.
Note:
•
Other users connected to the recorder are logged out
automatically during measurement. They are logged back in
after measurement is complete.
•
Measurement results are for reference only. They are subject to
change in accordance with the network environment.
•
The target for measurement is the value after clicking [Set].
•
Since the recorder uses a network, network traffic and other
factors can make it impossible to obtain live video and recorded
images as expected from the setup, slow browser response, or
disconnection. Also, recording may not be possible when the
recorder is in use or malfunctioning. We are not liable for lost
content.
SD memory recording is a camera function that saves images to the
camera's internal SD memory when communication with the camera
is not possible within the programmed recording time set on the
recorder.
Recording rate setting
SD memory recording can only be set if the camera supports SD
memory recording and the compression format is set to [M-JPEG].
The recording rate can be set for each camera channel. (page 42)
The start time of SD memory recording depends on the recording
rate setting.
Set the SD memory recording rate to a smaller setting than the
emergency recording rate.
Note:
•
When the recording rate for SD memory recording is set, be
sure to set to use recording to the SD memory card in the
camera. When the camera is set to not use SD memory cards,
or when an SD memory card is not inserted in the camera (or
inserted incorrectly), an error message appears several times a
day and recording is not done.
Acquiring images saved on the SD memory card
The images are acquired from the SD memory card and recorded on
the HDD.
You can confirm when data is being acquired from the SD memory
in the "Status display area".
SD memory acquisition is described below.
• 15 minutes past each hour (0:15, 1:15, ...23:15)
Note:
•
Depending on the schedule's time table and the amount of
images, it may not be possible to acquire them all automatically
at one time. The images that cannot be acquired may be
acquired at the next acquisition.
•
Image acquisition is not done in the following situations.
During playback, HTTP download, emergency recording, and
external recording
•
SD memory data acquisition is interrupted if the following
operations occur.
⋅
Login
⋅
Emergency recording
⋅
External recording
⋅
Shifting to/from summertime (daylight savings)
About the [Measurement] button
Important:
•
Network traffic volume fluctuates depending on the network
environment. Set a rate based on measurement results to
ensure enough margin for maximum network speed.
•
Recording, playback, live video, a copying are all disabled
while measurement is in progress.
About SD memory recording
Important:
•
When communication with the camera is discontinued during
emergency recording, the recording rate set for SD memory
recording is used.
•
SD memory recording cannot be done when the network
communication between the camera and the recorder is
disconnected, and the alarm is entered to the recorder or it
reached start time of the scheduled recording time starts.
•
Do not set SD memory recording rates on multiple network
disk recorders for the same camera.
•
The time recorded on the acquired SD memory data is the
time set on the camera. The NTP function can be used to
synchronize the time on the camera and the recorder. You
may not be able to back up SD memory if the time is not
synchronized.
•
If the recording conditions for multiple cameras are changed
and emergency recording is done, recording may be delayed
for up to six seconds when 64 cameras are recording at the
same time.
Summary of Contents for WJND400 - NETWORK DISK RECORDER
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