3 Functional description of the structure switches
3.4 Controller types (S1, S42 to S45)
Manual
64
SIPART DR21
C73000-B7476-C143-08
D Display of the external setpoint w
E
With the Shift key (6) the digital x/w-display can be switched between the display levels I to
IV depending on the position of S81.
In display level II the active w can be displayed, in display level III the main control variable
x1. The external setpoint w
E
is displayed in display level IV. The displayed active or inactive
setpoint can also be adjusted (see table 3-3).
The active setpoint- and actual value are displayed on the analog displays.
Structure
switches
Posi-
tion
Function
S81 Switching the w/x-digital display
Display order
I II III IV
[0] x/xv w/wv -- --
1 x/xv w/wv x1/xv --
2 x/xv w/wi1/wv -- wE/wvE/wi2
3 x/xv w/wi1/wv x1/xv wE/wvE/wi2
4 x/xv -- -- --
5 -- w/wv -- --
6 -- -- x1/xv --
7 xv wv x1 w
Identification of the displayed variables by the w- or x-signal lamp:
1 = steady light, 0.5 = flashing light, 0 = off
Display order
I II III IV
1 0 0.5 (0 at S81=6) 0 x-signal lamp
0 1 0 0,5 w-signal lamp
Table 3-3 Display levels (S81)
D Operation with 2 or 3 setpoints
If tracking of the inactive setpoint to the active setpoint is blocked with S45 = 1, a multiple
setpoint operation (switching between wi, w
E
and SH is achieved (see table 3-4, page 65)
and table 3-5, page 66.
D Controlled variable processing
A 2-component control is implemented (disturbance variable connection). With factors c1
and c3 the main controlled variable x1 can connect the auxiliary controlled variable x2 with
weighting.
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