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Verfügbare Sprachen
Verfügbare Sprachen
trSt
Sample-and-hold amplifier. The control input holds the input value.
IntE
constant t adjustable in minutes, and adjustable energy offset P1. The
control input sets the integrator to 0.
Formula :
y(t)
y(t-T
)
r
T
= calculating cycle time = 80ms
r
t = time constant
x = integrator input
P1
With a constant input value, the integrator output reaches this
value after elapse of the adjusted time constant t !
Example: A flow is measured in m
total. As the measured flow is referred to time unit hours, the time constant
must also be 1 hour = 60 minutes. Parameter P1 can be used for zero
correction.
In the manual scanner mode, using the integrator is little purposeful, since a
channel is only used for calculation, if it happened to be selected. In the
automatic scanner mode, the scanning interval during which other channels
are measured is taken into account in the calculation.
However, input changes during this time are not measured, since the
channel is not measured!
LAG1
As with function1.
Can be switched off additionally via control input Ct-F2!
9499-040-24701
=
+
y t
( )
y t T
( \
)
r
= integrator output
= integrator output at last calculating cycle
= input offset (zero correction)
T
(
)
⋅
+ 1
x P
r
t
3
/h. The integrator shall measure the flow
TRST block input
TRST block output
Integrator with time
11
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