West Control Solutions KS98-1 - 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