EMA-D9 - USER MANUAL
-47-
10.7) DIGITAL
OUTPUT
The digital outputs can be programmed to function like alarm
(overload, load management for consumption optimization, etc.), or
pulses emission for energy calculation or remote activation using
software NRG.
•
Out Index
, expresses the number of output, from 1 to 6 (DO1
and DO2 standard), to select or program, which are present on
the hardware of the instrument.
•
Type
, allows to select the type of functioning as:
-
Always Off: digital output is always disabled.
-
Energy Pulse: pulse emission proportional at energy registered and depending the programming
used (valid only for Energies).
-
Min. Threshold: the output is enabled if the value of the selected variable is lower of the
programmed value.
-
Max. Threshold: the output is enabled if the value of the selected variable is higher of the
programmed value.
-
Band: the output is enabled if the value of the selected variable is lower of the programmed
minimum value or higher of the programmed maximum value.
-
Always On: digital output is always enabled.
•
Measure Code
, is the parameter of measure to associate on the digital output. To program the
digital output as pulse emission it’s necessary to select an energy
variable.
•
Value
, intervention threshold value (i.e., for overcoming 340V
program 340.0, or 150kW program 150000,0) or pulse weight (i.e.,
if the active positive energy pulses must be emitted every 1 kWh
program 1.00) programmable from 0,01 to 100 kWh/pulse.
•
Inf-Sup Value
, low limit and high limit of alarm in band way.
•
Time
, is the threshold delay for intervention expressed in second
(0-655 seconds) or duration time of Pulse expressed in
milliseconds (50-500 ms).
•
Hysteresis
,
it’s
the
percentage
of
alarm’s
value
under
which
the
alarm
come
back
in
off
condition:
it’s
programmable
from
0
to
99%
(ex.:
max
threshold
of
active
power
at
150kW
with
10%
hysteresis
means
the
alarm
come
back
in
off
condition
when
the
active
power
will
be
150-
15=135kW).
It’s
not
available
in
Pulse
mode.
Note:
digital
output
management
for
P.F.-cos
Φ
.
In the P.F. and cos
Φ
the absolute minimum is
considered the 0 capacitive and the absolute
maximum the 0 inductive.
To set an alarm when the cos
Φ
is less than
e.g. 0.9 inductive (in the direction of 0
inductive) it’s necessary to set MAX threshold
mode. Instead of this, to set an alarm when
cos
Φ
is more than e.g. 0.9 inductive (in the
direction of 0 capacitive) it’s necessary to set
MIN threshold mode. In BAND mode there will
be alarm when the cos
Φ
value will be extern to the set band (infvalue÷supvalue): the infvalue must be
the value nearest at the 0 capacitive.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
CAP
IND
Min threshold
0
-0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1
1
CAP
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
IND
Max threshold
0
-0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1
1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
CAP
IND
Band
0
-0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 -0.9 -1
1
ON
OFF
