Follow-Up Controller, Synchronized Controller, Spc-Controller - Siemens SIPART DR22 Manual

1 Technical Description
1.5 Functional description of the structure switches
1.5.4 Controller types (S1, S49 to S53)
1.5.4.5 S1 = 3:
ler
wi
SES
w
ES
Δw
we
w
EA
FE3
FE1
x=x1+c1 · x2+c3
x1
FE2
x2
FE4
z
Figure 1-30 Principle representation S1 = 3
In this controller type you can switch between the internal setpoint wi and the external setpoint
w depending on the control signals CB and the Internal-/External key (2) (see table 1--11,
E
page 61 and table 1--12, page 62).
The external setpoint can be preset via the analog output FE3 (w
Δw as an incremental setpoint (w
S101). The active setpoint w can be fed back by an appropriately assigned analog output to the
feeding controller for follow up when using w
This controller type is used for cascade controls with 2 separate controllers (master and fol-
low-up controllers), for synchronized controls, fixed setpoint controls with external setpoint pre-
set (e.g. under console conditions via the incremental Δw-inputs) and SPC-controls (setpoint
control). This controller type attains special importance when coupled with the SIPART software
for operation and monitoring. Here this controller type is used for fixed setpoint control with
external setpoint preset (w
the input y (see chapter 1.5.6, page 99).
ES
-- SPC controls
Here a process computer takes over the setpoint command during computer operation
RC = Int∧CB = 1, in the event of a computer failure (CB from 1 ! 0) the controller takes
over either the last computer setpoint (followed up wi) or the safety setpoint SH (selection
via S51).
58
Follow-up controller, synchronized controller, SPC-control-
0000
wi
INT∧CB
w
SL
w =c4 · w +c5
E E
w
E
x
) (selection via S53) or via the SES (w
EΔ
EA
) and Automatic/Manual switching via the follow-up signal N
ES
0000
x
w
tS
w
+
P I D
--
x
) or via the digital signals
EA
or for displaying when using w
Manual
000
y
H
y
y +c6 · z
a
y
a
) (selection by
ES
Δ .
E
and
ES
SIPART DR22 6DR2210
C79000-G7476-C154-03