Siemens SIPART DR22 Manual page 116

1 Technical Description
1.5 Functional description of the structure switches
1.5.6 Controller output structures (S2, S61 to S68)
functions. At S64 = 4 this locking facility is omitted and operation is always parallel to the
front keys.
To avoid simultaneous actuation by the controller front and the SES the last switching action
can be read both on the process control system and the controller. For this, a status bit is
set when writing Int
actuated. By requesting the status bit, the process control system can issue a warning when
the last operation took place via the front.
If the last operation took place via the SES the warning SES flashes for 3 s in the x/w
display when the Internal key or the Manual key is pressed. This initial pressing of the keys
does not activate a switching function, only when the keys are pressed again is the desired
switching function triggered.
-- Output structure controller II at S1 = 12
With S1 = 12 a second parallel independent control channel is released. Operation and
monitoring of both control circuits take place on two levels which are selected with the Shift
key and signaled by the displays I or II.
The functions of the output structure of the controller II correspond to those of the
controller I; only exception: incremental manipulated variable adjustment is not possible.
The effect of the respective duplicated structure switches and parameters can be seen in the
following block diagrams.
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and He which is only reset when the front keys Int or Hi are
ES ES
Manual
SIPART DR22 6DR2210
C79000-G7476-C154-03