Siemens SIPART DR22 Manual page 114

1 Technical Description
1.5 Functional description of the structure switches
1.5.6 Controller output structures (S2, S61 to S68)
-- Automatic mode (y=y
Automatic operation is switched on with the Automatic/Manual key (yellow manual LED(8)
off). All other control signals He, N (DDC), Si and
lated variable is connected through to the controller output.
-- Manual mode (y=y
Manual operation is switched on by the Automatic/Manual key (yellow manual LED(8) an) or
the control signal He as an OR function. The control signals Si and yBl must be 0.
If follow-up operation has priority over manual operation (S61=0), the control signal N (DDC)
must also be 0. The manual manipulated variable is through connected to the controller out-
put. The manual manipulated variable is preset in K-controllers as an absolute value, in S-
controllers as a positioning increment.
-- Follow-up(DDC) mode (y=y
The follow-up mode is switched on by the control signal N (in DDC mode by the control
signal CB and the Internal/External key 1.5.4, page 40). The control signals Si and yBl
must be 0. If manual mode has priority over follow-up mode (S61=1) the control signal
H=Hi v He must be 0.
The external manipulated variable y
source for y is preset at S101 = 0 or 1 as an absolute value (y
E
(S62=0) or as an external manipulated variable with incremental adjustment by the control
signals Δy (y
Δ
N
)
100 %/tY. With S101 = 2 the absolute value becomes active as an external manipulated vari-
able via the SES (y
sets of the manipulated variable are not possible, only the external manipulated variable with
incremental adjustment (y
-- Safety operation (y = y
The safety operation is switched on by the control signal Si. The control signal yBl must
be 0. The safety manipulated variable y
parameter in the structuring mode oFPA in the range from --10 to 110 %. In S--controllers
with internal feedback (S2 = 1) absolute value preset is not possible. When safety operation
is active the output at YS<50 % is -- Δy continuous contact and at YS ≥ 50 % +Δy
continuous contact so that the actuator moves to the end positions.
-- Direction dependent blocking operation
Blocking operation is controlled by the control signals yBl. All other control signals have no
function. If a control signal is applied the manipulated variable output is blocked direction-de-
pendently, i.e. only changes in the opposite direction are allowed. If both control signals are
applied simultaneously, the output is blocked absolutely. The direction-dependent blocking is
necessary especially in S-controllers with internal feedback and actuators with limit stop
switches to avoid integral saturation. If the control circuit is opened on reaching the end posi-
tion of the actuator, further integration of the controller must be prevented in order to be able
to react immediately in the event of control difference reversal.
112
a)
H)
E)
is connected through to the controller output. The
E
(S62 = 1). The incremental adjustment runs at the adjustment speed
). In S--controllers with internal feedback (S2 = 1) absolute value pre-
ES
Δ) is available.
N
s)
is through conencted which can be set as a
s
yBl must be 0. The automatic manipu-

) via the function input FE5
N
Manual
SIPART DR22 6DR2210
C79000-G7476-C154-03