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UMG 96-PA / UMG 96-PA-MID / UMG 96-PA-MID+
Pulse counter
All digital inputs can be operated with a frequency
of 25 Hz. The pulse duration (pulse width) and the
pulse pause must be greater than 20 ms.
The typical pulse duration for S0 pulses is 30 ms.
The maximum number of pulses per hour is cal-
culated based on the minimum pulse duration and
the minimum pulse pause:
Pulse
length
(pulse
duration)
Pulse pause
(pulse
pause)
Max. pulses/h
20 ms
20 ms
90000 pul./h
30 ms
30 ms
60000 pul./h
50 ms
50 ms
36000 pul./h
100 ms
100 ms
18000 pul./h
500 ms
500 ms
3600 pul./h
1 s
1 s
1800 pul./h
10 s
10 s
180 pul./h
The pulse counters can be configured with simul-
taneous measured-value or power calculation.
The pulses are counted as a 64-bit number and
will overflow after approx. 1.17 x 10
10
years of
continuous operation (25 Hz).
Pulse valency
A pulse valency can be assigned to each digital
input. With the pulse valency you specify which
measured value or power value (e.g. energy)
should correspond to one pulse.
Measured value calculation:
Measured value = pulse x pulse valency
Power value calculation:
Power value =
Pulse x pulse valency
Time [s]
Since the pulse interval can be very large, contin-
uous calculation of the measured or power values
is not possible. Consequently, only average values
are calculated. The calculation of the average
values for the measured value calculation results
from the number of pulses per period multiplied
by the pulse valency. For the calculation of the
mean power values, this value must be divided by
a configurable time value.
The period is assigned to the respective digital
input and can be set to between 1 and 60 min-
utes. After the period has expired, the value can
be called up via Modbus.
An external synchronization can be connected for
each digital input, whereby one synchronization
pulse completes a period and starts a new one. A
capture time of 30 seconds is permanently preset
for the external synchronization. If there is still no
synchronous pulse after the period has expired,
the software waits a maximum of 30 seconds and
then synchronizes. All further periods are then
synchronized by the software.
NOTE
The pulse interval is proportional to the power
within the selected settings.
NOTE
When programming with the GridVis
®
software,
you are given a selection of energy values, but
these are derived from the power values.
Fig.
Examples for the maximum number of pulses per
hour.
Pulse duration
> 20 ms
Pulse pause
> 20 ms
A period of 15 minutes is set at the factory.
The calculation result of the S0 power value is
only available at the end of the period.
