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Miscellaneous functions
KW2M-A/X User's Manual
53
6.2.8 Power alarm
When the measured value exceeds the setting for instantaneous electric power (active, reactive,
apparent, active (export), reactive (export)), pulse output turns on in order to notice.
When the measured value falls below, the output turns off.
6.2.9 Other alarms
Output turns on or off according to each alarm setting.
PF alarm, over frequency alarm, under frequency alarm, voltage harmonics alarm, current harmonics
alarm
、
voltage THD alarm, current THD alarm, voltage unbalancing alarm, current unbalancing alarm,
power demand alarm, current demand alarm
6.2.10 Output depends on count value
Set a preset value and the pulse output turns on when the count value has reached the preset value.
Refer to 6.3 Counter function for details.
6.2.11 Level output
It turns on or off the output by writing 0 (OFF) or 1 (ON) to the data register allocated to each output
(OUT1: DT50294, OUT2: DT50295) for communication with an external device.
6.3 Counter function
●
Operation mode
Maintain output hold count HOLD
[Output]
OFF
ON
[Counting]
possible
[Addition]
0
1
2
3
・・・
n-2
n-1
n
n+1
n+2
n+3
n: Preset value
(1) Output
turns on when preset value “n” is reached. The output is held until it is
reset. The device
keeps on counting
even after “n” has been reached
.
(2) The counter reverts to
“
0
”
after it has counted to the end of the valid range, but output control is
still maintained. However, the output turns OFF if the count value or the preset value are
changed.
●
Change the Preset Value
It is possible to change the preset value even during counting. However, please note the following
points.
◇
When the pre-scale value is
“
1.000
” (PSCL=1.000).
(1) If the preset value is changed to a value lower than the count value, counting will continue until it
reaches the end of the valid range, returns to
“
0
”
and then reaches the new preset value.
(2) If the preset value is changed to
“
0
”
,
the counter will not begin counting at “0”
right away. Instead,
counting will continue until it reaches the end of the valid range and then it will start counting
from “0”.
(3) When the count value is fixed, output is changed according to the changing of preset value as
below.
If the preset value is changed to a value lower than or equal to the count value, the output is ON.
(
Count value
≥
Preset value
)
If the preset value is changed to a value higher than the count value, the output is OFF.
(
Count value < Preset value
)
◇
When the pre-scale is not
“
1.000
”
.
(
PSCL
≠
1.000
)
Even if the preset value is changed after counting to the end of the valid range, the output is not
changed.