56Event functionThe recorder will take an event action when any of the following events occur.• Terminal alarm: An event when an alarm input signal is supplied from an external device such as a door sen-sor to the alarm input terminal on the rear of the recorder.• Video Motion Detection (VMD): An event when a motion is detected in images by the video motion detectionfunction. (See below about the VMD function.)• Video loss: An event when the video input signal is lost, such as by the camera cable disconnection, mal-function of the camera, etc.• i-VMD camera alarm: An event when an alarm (motion detection, object appearance/disappearance, etc.) isdetected by the SD5 camera.• Camera site alarm: An event when an alarm (motion detection, etc.) is detected by a camera.• Command alarm: An alarm when receiving an alarm from a PC, etc. via a network.Note:• Video Motion Detection (VMD) functionWhen a motion (luminance change) is detected in the specified area (detection area), the recorder will regardthis as an alarm detection.Refer to the Installation Guide for the settings required to use the video motion detection function.• When the recorder is just after rebooted, an alarm detected by an SD5 camera may sometimes be displayedas a camera site alarm. In a similar way, an alarm detected by an SD5 camera connected to the encoder(WJ-MP204C) may be displayed as a command alarm.• Cameras will provide a notification only when an alarm input is detected. Therefore, the recorder will not dis-play an alarm occurrence indication when the recorder is booted while an alarm input is being supplied.Event actionWhen an event occurs and the recorder detects the event occurrence, the recorder will take the event actionaccording to the settings configured in advance.The event action mode can be selected from the alarm mode (ALM), activity detection mode (ADM) and Off.(☞ Installation Guide)Refer to a system administrator for further information. A different event action will be taken depending on theselected event action mode.When selecting the alarm mode (ALM), the recorder will take an alarm action.Event action mode• Alarm mode (ALM)When the alarm mode (ALM) is selected, notification of an event occurrence will be provided to outside thesystem. In this manual, event actions to be taken in the alarm mode are called "alarm action".• Activity detection mode (ADM)When the activity detection mode (ADM) is selected, only recording and indication of an alarm occurrencewill be performed at an event occurrence. No notification of event occurrence will be provided to any exter-nal device in the activity detection mode (ADM).• OffOnly filing logs of event occurrences will be performed. No other event action will be taken.