Vivotek VS3102 - Manual (Page 59)

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continuously over a configured period. This mode can be used to integrate with another web server to
serve overloaded requests. If the date and time suffix option is disabled, the Video Server can use FTP to
upload and overwrite snapshot files periodically. The remote folder of snapshot files for FTP can be
configured on the network page. The snapshot period is between "Snapshot begin" and "Snapshot end"
and it will repeat everyday. The snapshot interval is set in "Snapshot every second".
"Event operation" can be used to combine motion detection with devices attached to digital input, to
drive devices attached to digital output, or send out snapshots for evidence. It helps users establish an
easy security system. Administrator may choose any combination of conditions to form special
applications according to their personal needs. The Video Server will continuously monitor the channel
and digital input every half second. Once the user-defined conditions are matched, the Video Servers will
capture three stages of events and react based on the "Trigger action" settings. The post-event snapshot
can be configured to be delayed after events happen according to the setting in "Take snapshot at
seconds after event". The three stages of snapshots will be VPRE.JPG, VTRG.JPG and VPOS.JPG. Since
the same event may exist for a while, Administrator can set delay time in "Delay seconds before
detecting next event" to reduce multiple triggers by the same event.
There are two kinds of "Trigger condition". For digital input there are four options provided to combine
with the user's device. Rising and falling will make events happen once. For motion detection, there are
window names shown below as choices. Refer to the previous section for configuring motion detection.
Note that larger object size and lower sensitivity will make it more difficult for the Video Server to detect
varied images. Once the "Trigger condition" is matched, the Video Server will drive the digital output
device and/or upload snapshots based on the "Trigger action" settings. The application settings should be
carefully examined to operate accurately. If Administrator are not sure of the digital output status before
configuring applications, "Reset output" can be used to return the digital output to the default “Normal
Close” state.