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Wireless Communications
The OWS wall switch sensor transmits using EnOcean equipment profiles or
EEP's. The OWS occupancy sensor uses EEP: A5-07-01 which transmits the
occupancy state (occupied or vacant) of the monitored space. The OWS switch
uses EEP: F6-02-02 to transmit the switch action (On, OFF, Dimming).
Operating Sequence
If the monitored space is vacant for a period of time, only the PIR interface will
actively monitor for occupancy. The audio interface will be disabled.
Once the PIR has detected motion, an occupancy telegram is sent immediately
and the audio interface is enabled.
Once the audio is enabled, two timers become active that control this
interface.
The Audio Enabled Timer is reset with each PIR event and defines the
1.
maximum duration which the audio remains active.
If the timer expires, the audio will be disabled, no other action will be
performed at that time. Once this timer has expired, only PIR triggers
can reset the timer to keep the light on. The default setting for the Audio
Enabled Timer is 60 minutes and is not configurable.
The Sensor Occupancy Timer is reset upon each audio or PIR trigger at
2.
the next occurrence of a telegram. It defines the time in which an occupancy
trigger (PIR or audio) must be detected to keep the audio active. The default
value for this timer is 20 minutes and it is configurable to values of 5, 10,
15, 20 , 25 minutes or disabled. If the sensor occupancy timer expires, the
OWS will send out a vacancy signal and 40 seconds later the audio will be
disabled. The 40 seconds is grace time that allows an occupant to use sound
to reset the sensor occupancy timer and keep the light on.
The audio interface has a sound threshold that when exceeded, will maintain
the sensors occupied state while the timers are active. The threshold is slightly
higher than the background noise level. The background noise level is averaged
over a 30 second window and filtered out. Any other sound louder than this
background level will trigger the audio.
For example: If a fan is running in the background while the space is occupied,
only a sound slightly louder than the fan noise will trigger the audio.
Either the PIR or audio can maintain the sensors occupied state with telegrams
being sent at minimum every 100 seconds. A red LED under the PIR lens will
blink when an occupied state telegram is sent. A linked Echoflex controller has
an occupancy timer that is reset only when receiving occupied state telegrams
so the lights will remain on so long as the sensor continues to sense occupancy.
See the controller install guide for details on setting up this timer and
occupancy or vacancy modes of control.
2
(dual technology)
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