PMA KS 98, Manual

Page: 77 / 246

14.2 INTE ( integrator )
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.
Analog inputs
x1
Input variable to be integrated
Preset
External preset value
9499 040 50611
Time functions
77 INTE ( integrator )