Siemens SIPART DR22 Manual page 83

Manual
The process can be monitored at any time by manual switching. As a rule the display level
switch is in position I (main controller) so that the main controller variable x1I can be moni-
tored. Flashing of the Controller LED I signals that the limiting setpoint has been reached
and requests switching to the display level II (limiting controller) with the controlled variable
of the limiting controller.
The display range must be set separately for the digital x and w display for both controllers
with the parameters d*I and d*II if necessary in connection with the linearizers so that both
controllers can be displayed correctly.
-- Automatic/Manual switching
Since both controllers only generate one common automatic manipulated variable y
Automatic/Manual switching of both controllers is also common. In manual-, follow-up-,
safety- or blocking operation, both controllers are followed up to the active y. The
manipulated variable limit which is only active in automatic operation via the parameters YAI
and YEI represents an absolute manipulated variable limit in automatic operation. The
mutual follow-up of YA or YE can only take place up to the set limits. By setting YAI and
YEI, YAII and YEII are set to the same value automatically on leaving the parameterization
mode onPA.
SIPART DR22 6DR2210
C79000-G7476-C154-03
1 Technical Description
1.5 Functional description of the structure switches
1.5.4 Controller types (S1, S49 to S53)
, the
a
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