Indicators, Controls and Operations
40
• You will now see displayed the current status of the Positive Alarm Sequence and will be prompted to change status.
• If you wish to change the status press the “enter” key.
• If you do not wish to change the status, press the “cancel” key
Input Types
The following is a table of input types available for programming.
Note:
There will be no notification message advising a change of status
Input Types
Description
Non-Verified Alarm
When an un-bypassed non-verified alarm input goes into alarm the common alarm sequence
is activated. Un-bypassed relay, signal, and strobe outputs are updated according to their
programming and alarm zone status indicators associated with the input are activated. Alarm
input activations are displayed on the shared display in the common queue with alarm as the
highest priority and is displayed first.
A pre-alarm condition on a device configured as an alarm input is displayed on the shared
display and on the alarm zone status indicator. If the pre-alarm condition is restored the
status will be cleared. If the input goes from pre-alarm to alarm, the pre-alarm status will be
replaced with the alarm status for the input.
Once an alarm input is in alarm the alarm condition is latched until system reset (changes in
status from alarm to pre-alarm or to normal are ignored).
Verified Alarm
When an un-bypassed verified alarm input goes into alarm, if the system is not already in
alarm, the alarm is verified over a period of time to determine if the alarm condition is valid.
For addressable analog devices, when a device goes into alarm, a 35 second timer is started.
When the 35 second delay times out, the device is monitored for the next 60 seconds, if it
goes into alarm again during this time the alarm is confirmed. Once the alarm condition is
confirmed, the alarm is processed as for non-verified inputs.
If the system goes into alarm at any point during verification process (due to an alarm on
another device or circuit), the verification process is aborted and the alarm is immediately
confirmed. If another Verified Alarm Input goes into alarm during the verification process, the
verification is aborted and the alarm is confirmed on both inputs. A trouble detected on the
circuit being verified during the verification period will also cause the verification to be aborted
and the alarm confirmed.
An alarm zone status indicator flashes during the alarm verification process. If the alarm is
confirmed the indicator will go steady, otherwise it will be turned off.
Once the system is in alarm verified alarm circuits operate the same as non-verified
circuits.The pre-alarm condition on verified alarm inputs is processed the same as non-
verified inputs; i.e. it is not verified.
A count is maintained of the number of times each verified input has gone through its
verification process without confirming an alarm. These counts can be retrieved for reporting
purposes and cleared.
Pos Alarm disabled
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