PD00E0XKNXFI00020100_HANDBOOK_EN.DOCX
PD00E0xKNX KNX PRESENCE DETECTORS RANGE Handbook
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42/46
21.
Virtual holder
Virtual holder is activated by enabling corresponded
The application field is typically the hotel room
where, by using this feature, you can remove the
Holder for access control.
This logical module provides a set of parameters
and
communication
objects
that,
suitably
configured, allow you to set up whether or not a
person is occupying the room.
Definitions:
VH
= Virtual Holder
CO
= Communication Object
IN
= CO receiving telegram from the bus
OUT
= CO sending telegram on the bus
Welcome
= event triggered when someone enters
the room which was not occupied
Goodbye
= event triggered when the room goes in
How it works
When one or more people enter the room, that
event is recognized by the door opening and if, after
it is closed, the customer's presence is still
identified, then the logical module decides that the
client is in the room otherwise it determines that he
is out of the room. The minimum set of sensor
requested for this logic to work properly is:
one door contact for each door of the room, this
contact must be detected by a KNX device in
is closed and value 1 when door is opened
at least one presence detector for each area; this
presence detector can be KNX or conventional
with dry contact output to be connected a KNX
input. This device must send on the bus the
when presence is not detected.
Communication Objects
<VH> Room Booked
IN
1 bit
the room is booked or not; default value for this status can
<VH> Signal for guest (Type1)
IN
1 bit
<VH> Signal for service (Type2)
IN
1 bit
<VH> Signal for maintenance
(Type3)
IN
1 bit
This COs can be used to communicate to the VH module
who is entering the room. This can be achieved by using a
KNX Access Control Reader (
Synchronicity by eelectron) or
by interfacing other access systems with KNX bus
<VH> Presence for guest (Type1)
OUT
1 bit
<VH> Presence for service (Type2)
OUT
1 bit
<VH> Presence for maintenance
(Type3)
OUT
1 bit
This COs can be used to send from VH module information
about who entered the room to a supervisor or similar sw.
<VH> Remote Inputs Enabled (Global
Enable)
IN
1 bit
See paragraph Remote Sensor inputs (Global Enable).
<VH> Presence Output
OUT
1 bit
(absence).
<VH> HVAC Output
OUT
1 byte
This CO is used to send HVAC commands in event of
presence and absence. Commands can be set different if
the room in booked or not and if the person who enter the
room is guest, service or maintenance.
<VH> Additional Output
OUT
1 byte
This CO is used to send commands in event of presence
and absence. Commands can be set different if the room
in booked or not and if the person who enter the room is
guest, service or maintenance.
Parameters General
KNX PARAMETER
SETTINGS
Presence wait time
1 min to 3 hours
and consequent closing of the door. During this time
Use values for this parameter that are not too small to
avoid not recognizing people in the room and not too
big to avoid to kkep room service active for too long
after customers leave.
