Nt t – West Control Solutions KS98-1 User Manual
Page 127
Analog inputs
x1
Input variable to be integrated
Preset
External preset value
Digital outputs
max
= 1 exceeded with max. limiting
min
= 1 exceeded with min. limiting
Analog output
y1
Integrator output after elapse of integration t
n ts
= ×
Parameters:
Parameter
Description
Range
Default
T
Time constant in s
0.1...999 999
60
x0
Constant
-29 999...999 999
0
y0
Preset value
-29999...999 999
0
Min
Min. limiting
-29999...999 999
1
Max
Max. limiting
-29999...999 999
0
Mode
Source of preset = Para y0
0
0
Source of preset = InpPreset
1
Ramp function:
With constant input x1+x0, the applicable formulas are
y t
y t
n
ts
T
x
x
1
0
1
0
( )
( )
(
)
=
+ Ч Ч +
t
n ts
= ×
t is the time required by the integrator for changing output y1 linearly by value x1 + x0 after integration start.
Ramp response:
The function has a ‘memory’. This means: after power-on, it continues operating with values y1, z1 and z2, which ex -
isted at power-on, provided that the RAM data are still available.
Example: Which is the value of output variable y after t=20s with a time constant of 100s, if a constant of x1 = 10 Volt
is preset. Sampling interval ts is 100ms.
n
t
t
s
=
n
s
s
s
=
=
20
01
200
,
y
after
s
= + Ч
Ч =
0 200
01
100
10
2
20
,
_
_
This results in a gradient of 2V/20s or 0.1Volt /1s.
Time functions
9499-040-82711
III-127
INTE (integrator (No. 51))
Fig. 6