Chapter 5: Using the Web Interface
194
"unavailable" State
The
unavailable
state means the connectivity to the sensor is lost.
The Dominion PX pings all managed sensors at regular intervals in
seconds. If it does not detect a particular sensor for three consecutive
scans, the
unavailable
state is displayed for that sensor.
When the communication with a contact closure sensor's processor is lost,
all detectors (that is, all switches) connected to the same sensor module
show the "unavailable" state.
Note: When the sensor is deemed unavailable, the existing sensor
configuration remains unchanged. For example, the ID number assigned
to the sensor remains associated with it.
The Dominion PX continues to ping unavailable sensors, and moves out of
the
unavailable
state after detecting the sensor for two consecutive scans.
"normal" State
This state indicates the sensor is in the normal state.
For a contact closure sensor, this state is the normal state you have set.
If the normal state is set to Normally Closed, the
normal
state means
the contact closure switch is closed.
If the normal state is set to Normally Open, the
normal
state means
the contact closure switch is open.
Note: See
Configuring a Contact Closure Sensor
(on page 36) for
setting the normal state.
For a numeric sensor, this state means the sensor reading is within the
acceptable range as indicated below:
Lower Warning threshold <= Reading < Upper Warning threshold
Note: The symbol <= means smaller than (<) or equal to (=).
"alarmed" State
This state means a discrete (on/off) sensor is in the "abnormal" state.
For a contact closure sensor, the meaning of this state varies based on the
sensor's normal state setting.
If the normal state is set to Normally Closed, the
alarmed
state means
the contact closure switch is open.
If the normal state is set to Normally Open, the
alarmed
state means
the contact closure switch is closed.
Note: See
Configuring a Contact Closure Sensor
(on page 36) for
setting the normal state.
Содержание PX-1000 Series
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