7 Application examples for configuring the controller
7.2 Working with different setpoints
Manual
198
SIPART DR21
C73000-B7476-C143-08
Example 4 Fixed setpoint controller with setpoint ramp (ts > 0)
Operation with an adjustable setpoint w
i
, with x tracking by Si (safety manipulated variable yS).
Due to x tracking the active setpoint follows the controlled variable x without a delay at Si=1 (DI
for safety manipulated variable). If Si becomes 0 the setpoint returns to the setpoint w
i
set
earlier with the setpoint ramp set as a time parameter. The setpoint ramp is not effective in x
tracking.
w
i
w
i
w= x
t
0
w(%)
100
S1 = 0
Si on DI2 S26 = 2
S37 = 0
x tracking S43 = 1
S45 = 1
ts > 0
w
1
=w
i
(can be set on the front)
w2 = x (x tracking)
ts
t
Lo
DI2(Si)
Hi
t
0
x(%)
100
t
0
y(%)
50
Attention!
SH (safety setpoint) can only
be selected based on w
E
(ex-
ternal setpoint).
Figure 7-4 Setpoint curve according to example 4
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