West Control Solutions KS98-1 - Manual (Page 126)

III-6.2 INTE (integrator (No. 51))
The integrator forms the integral according to equation:
( ) ( ) ( ) [ ]
y t y t t
t
T
x t x
s
s
1 1 1 0
= - + × +
ts sampling interval x1(t) instantaneous x1
T Integration constant y1(t) y1 after t=n*ts
n Number of calculation cycles y1(t-ts) previous y1
x0 Input offset
The complex transfer function is:
( )
F p
T p
=
×
1
Unused control inputs are interpreted as logic “0". With simultaneous input of several control commands:
reset = 1 has priority over preset and stop
preset = 1 priority over stop
Integrator output y1 is limited to the preset limits (Min, Max): Min ß y1 ß Max. When exceeding Min or
Max, the integrator is stopped automatically and the relevant control output min or max is set to logic 1. Limit value
monitoring uses a fixed hysteresis of 1 % referred to operating range (
Max - Min)
Inputs/outputs
Digital inputs
stop
= 1 The integrator is stopped for the duration of the stop command. Output y1 does not change.
reset
= 1 The integration result is adjusted to lower limit (Min). After cancelation of reset,
integration starts at lower limiting.
preset
= 1 The integration result is set either to a preset value y0 ( Mode=0) or to a preset variable
Preset (Mode= 1). After cancelation of the preset command, integration starts with
the actually effective preset value.
9499-040-82711 Time functions
INTE (integrator (No. 51)) III-126
preset
reset
stop
x1
z1
z2
y1
y0
Mode
?1
T
ò
MAX
MIN
MAX
MIN
Min
Max
x0
Preset