Rev. B
2-10
HMXMC001013
31-Mar-06
2.21 ALARMS IN GENERAL, CONTINUED
As well as external alarm inputs, other internal system alarms that can be made available
are:
•
Camera fail alarms
•
PTZ site fail alarms
2.21.1 Camera
fail
alarms
In some video systems, the cameras are automatically monitored to check for camera
malfunction and/or cut-cabling etc. Any of the fail conditions discussed in section
2.13,
Camera failed detection
, will trigger this alarm.
The proper system response to such an alarm condition should be programmed in the
camera's START MACRO sequence.
2.21.2 PTZ site fail alarms
In some video systems, the PTZ site receivers used for particular cameras are
continuously monitored. If a site should fail to communicate with the video system (i.e.
blown fuse, cut cable etc.), an alarm will occur.
To ensure proper system response for such alarms, the camera's START MACRO
sequences must be programmed accordingly.
WARNING:
The
@V
system constant can be
interrogated as the first step of the START MACRO to
determine the type of camera related alarm. Refer to the
appendix.
