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3.5.4 Pulse outputs
The individual energy totals can be weighted with a separate divisor (de-
fined in kWh/impulse) and forwarded to pulse outputs. Similar to the pulse
inputs, the duration of pulse length and pulse interval can be programmed
in the range from 10ms to 1000ms in steps of 10ms. A pulse output can
buffer up to 255 pulses. As soon as this value is exceeded, the unit sets the
correlated error bit in the unit status. This error bit can only be reset manu-
ally by the user. It is possible to link an output (Out1 to Out4) on a software
level to a particular totalling unit. When this link for a pulse output is modi-
fied, the pulse buffer of that output is cleared.
Please note that when the function „Differential Total calculation“ is acti-
vated (Hysteresis > 0), the relation between current demand and correlated
pulses at the output can temporarily run out of synchronization because of
buffered pulses.
3.5.5 Apparent demand and cos(ϕ
ϕϕ
ϕ)
The DLX can calculate the apparent demand and the demand factor cos(ϕ)
of any input and total registers. One register each can be defined to hold
the active or reactive demand, respectively:
2
)(
2
)(
demand activedemand reactive = demand Apparent
+
demand Apparent
demand Active
= ( cos )
ϕ
Up to two calculations of apparent demand and cos(
ϕ
) are possible. The
results are available on the display and can be stored in the periodic buffer
(load profile memory). For the cos(
ϕ
) the display (and the stored value) will
always contain the first three decimals.
Example:
Active demand:
900 kW
Reactive demand:
120 kvar
→
Apparent demand:
907,965... kVA
→
Display of app. demand:
908 kVA
→
cos(
ϕ
):
0,99123...
→
Display of cos(
ϕ
):
991
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