Siemens 6DR2210, Руководство пользователя

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Manual 1 Technical Description
1.5 Functional description of the structure switches
1.5.4 Controller types (S1, S49 to S53)
SIPART DR22 6DR2210
C79000-G7476-C154-03
79
As a result the main controller controls down its manipulated variable and with it the heating
performance and imposes the manipulated variable limit on the main controller. The case
temperature drops below the limiting setpoint and the limiting controller drives to the
manipulated variable limit via the now positive control difference. It is controlled to a constant
core temperature.
The disconnection therefore always takes place when the controlled variable of the
non-intervening controller becomes more positive than the set setpoint (xd negative), then
the manipulated variable limited to maximum is dropped below, i.e. a maximum value limiting
of the controlled variables takes place. The manipulated variable maximum value limiting
corresponds in this example to a minimum value selection of the manipulated variables.
Depending on the structure switch position (S1 = 7 or 8) and the set controller direction of
effect (normal: +Kp or reversed: -Kp) the limiting direction of the controlled variables is
reversed (Minimum- or Maximum value limits):
S1
Manipu-
lated
variable
corres-
ponds
to y-
Controller direction
of effect
Disconnection at
Limiting of the
controlled
variables to
S1 variable
limiting
direction
to y-
selec-
tion
Main
control-
ler I
Limit ing
control-
ler II
Main controller
I
Limiting
controller II
x I x II
7 yA Max
norm +Kp norm +Kp xd I > 0, x I < w I xd II > 0, x II < Sb
Min Min
7 yA Max
rev -Kp rev -Kp xd I < 0, x I > w I xd II < 0, x II > Sb
Max Max
8 yE Min
norm +Kp norm +Kp xd I < 0, x I > w I xd II < 0, x II > Sb
Max Max
8 yE Min
rev -Kp rev -Kp xd I > 0, x I < w I xd II > 0, x II < Sb
Min Min
7 yA Max
norm +Kp rev -Kp xd I > 0, x I < w I xd II < 0, x II > Sb
Min Max
7 yA Max
rev -Kp norm +Kp xd I < 0, x I > w I xd II > 0, x II < Sb
Max Min
8 yE Min
norm +Kp rev -Kp xd I < 0, x I > w I xd II > 0, x II < Sb
Max Min
8 yE Min
rev -Kp norm +Kp xd I > 0, x I < w I xd II > 0, x II > Sb
Min Max
Table 1-15 Limiting direction of the controlled variables depending on S1 = 7/8 and controller direction
of effect
The direction of effect of the transmitter, actuator and controlled system are included in the
determining of the controller direction of effect (see chapter 4.1, page 215). As a rule,
limiting controllers and main controllers have the same direction of effect so that the second
part of the table is irrelevant.