Vista Columbus Triplex User Manual download pdf (Page 78)

0150-0296A 78 Vista Columbus Triplex CDR

8.3 Alarm/Event Fields

The two least significant bits are currently used for the Event commands. Bits 2 and 3 are used for the

Alarm commands.

7 6 5 4 3 2 1 0

MSB

LSB

Event Start

Event Stop

Alarm Start

Alarm Stop

8.4 Alarm Actions

No Alarm Change – 0000 00XXb

If both the start and stop bits are clear, the alarm status and camera record rates will remain

unchanged.

Start Alarm – 0000 01XXb

If only the start bit is set, the Vista Columbus Triplex CDR will enter the Alarm mode. The selected

camera will become the alarm camera. Pre-alarm video will be recorded and the Alarm Record Rate

will be initiated.

Every Start Alarm command should subsequently be followed with a Stop Alarm command

at some point. Failure to do so will render that alarm input useless, even if the alarm was

latched and gets acknowledged from the front panel. A Stop Alarm followed by a Start Alarm

will have to be sent to create a new alarm on that channel.

Stop Alarm – 0000 10XXb

If only the stop bit is set, the selected camera’s alarm status will be cleared. If no other alarms are

present, the Vista Columbus Triplex CDR will exit the alarm mode.

Momentary Alarm – 0000 11XXb

If both the start and stop bits are set, a momentary alarm will be initiated on the selected camera. Pre-

alarm video will be recorded at the alarm record rate, after which the Vista Columbus Triplex CDR will

continue to record video at the normal record rate.

NOTE

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Vista Columbus Triplex User Manual Page 78