During self-learning, EMS controllers learn the periods that outlets are open or closed by measuring
the activity.
EMS controllers have a self-learning matrix. The self-learning matrix is a 7-day (7 x 24 hour) matrix.
Each 24 hour period consists of 48 30-minute periods.
EMS controllers then set each 30-minute period with activity or without activity according to the out-
let opening and closing pattern.
The activity frequency (
AF
) parameter determines the amount of activity required to set a 30-minute
periods as an active period.
The activity frequency (
AF
) parameter is usually set to require one door opening or one motion detec-
ted to set a 30-minute period to active.
However, for specific installations, the active frequency can be configured to require more activity to
set a
30-minute period to ready.
The activity frequency (
AF
) parameter can also be set to automatically determine the optimal level of
activity required to a set a 30-minute period to ready.
EMS controllers remain learning in the ready mode for the period defined by the learning period
(
L P
).
The learning period (
L P
) sets EMS controllers to use a 1-day or 7-day learning period.
EMS controllers build the complete 7-day self-learning matrix as follows:
l
1-day learning period: the EMS controller runs in
ready mode
for the first day (24 hours).
The EMS controller then uses the self-learning matrix of day 1 for the next six days to build a
complete 7-day self-learning matrix.
l
7-day learning period: the EMS controller runs in the
ready mode
for the first 7 days to build a complete 7-day
self-learning matrix.
To set the activity frequency (
AF
) automatically, EMS controllers run for 48 hours to determine the
optimum activity frequency (
AF
). EMS controllers then start the learning period (
L P
) after the 48
hours required to set the activity frequency (
AF
).
Note:
l
If the activity frequency is set to automatic, EMS controllers must be allowed to run (powered up) continuously
for 48 hours before the EMS controller starts to build the self-learning matrix.
If power is lost during this period, EMS controllers start a new 48 hour learning period.
The table describes the total time that EMS controllers run in the ready mode only after being
powered up.
This is the minimum time before EMS controllers switch to the
saving mode
.
learning period (LP)
activity frequency (AF)
minimum time in ready mode
only
1 day
pre-set
1 day (24 hours)
1 day
automatic
3 days (72 hours)
7 days
pre-set
7 days
7 days
automatic
9 days
For more information about the parameters used in
self-learning
:
39 of 86
27 February 2014
