User guide

Chapter 5: Using the Web Interface
120
Sensor state Applicable to
below lower warning Numeric sensors
above upper warning Numeric sensors
above upper critical Numeric sensors
"unavailable" State
The unavailable state means the connectivity to the sensor is lost.
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 the 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.
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 via
the sensor's dip switch.
 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 23) 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 (=).