S1 = 0: Fixed Setpoint Controller With 2 Independent Setpoints - Siemens SIPART DR22 Manual

1 Technical Description
1.5 Functional description of the structure switches
1.5.4 Controller types (S1, S49 to S53)
1.5.4.2 S1 = 0:
INT∧CB
wi1
wi2
x1
FE1
x2
FE2
x = x1+c1· (x2-c2·x3+c3)
x3
FE3
z
FE4
Figure 1-24 Principle representation S1 = 0
This controller type can be used as a fixed setpoint controller with 2 independent setpoints (two
batch mode) or as a fixed setpoint controller with 1 setpoint, by blocking the Internal/External
switching (factory setting). By linking the inputs x1, x2, x3 with the constants c1, c2, c3, it can
be used as a three-component controller.
Switching between the two internal setpoints which are adjustable on the front separately as
one, two or three component takes place depending on the control signals Int and CB according
to table 1-5. Signaling of the active setpoint takes place on the LEDs Internal and C. As soon as
a LED lights, wi2 is active.
Control commands
Digital inputs Front
H∨N∨Si CB internal internal C
0 1 0
0 0 0
0 1 1
0 0 1
1 1 0
1 0 0
1 1 1
1 0 1
1)
follow up takes place at S52 = 0 and S50 = 1 to the controlled variable x, follow--up does not apply for the switching
wi1/wi2
at S52 = 1 automatic mode starts with wi=x (xd=0), the active setpoint runs to the old set value via the possibly set setpoint
ramp tS
2)
factory setting, fixed setpoint controller with 1 setpoint (S49 = 0: only Internal, Int = 1, S24 = -1: CB = 1) RB = Int
∧
RC = Int CB = Int∨CB
Table 1-5 Switching between wi1 and wi2
48
Fixed setpoint controller with 2 independent setpoints
0000
W
tS
Message signals Digital
Front LED outputs
RB RC
0 0 0 0
0 1 0 1
1 0 1 1
1 1 1 1
0 0 0 0
0 1 0 1
1 0 1 1
1 1 1 1
0000
x
W
+
P I D
ya
--
x
Effective w
at S50=
0 1
1)
wi1 wi1 (n)
wi2 wi2 (n)
2)
wi2 wi2 (n)
wi2 wi2 (n)
wi1 x
wi2 x
2)
wi2 x
wi2 x
Manual
000
yH
ya+c6 · z
Explanations
switching switching
mit CB, Int=0 with Int,CB=1
switching switching
with CB,Int=0 with Int,CB=1
SIPART DR22 6DR2210
C79000-G7476-C154-03
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