Manual
1 Technical Description
1.5 Functional description of the structure switches
1.5.1 Analog input signal processing permanently connected
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SIPART DR22 6DR2210
C79000-G7476-C154-03
1.5
Functional description of the structure switches
(S0 to S107, S200 to S268)
In the factory setting (setting when the device is delivered) most of the structure switches are
set to 0. This corresponds to the most usual setting of the individual functions so that only few
structure switches need to be set selectively during commissioning. However, it is recommend-
able to compare the individual structure switch settings with the task.
With structure switch S0 the user program can be identified by a number from 1 to 254 in the
structuring mode Strs. The setting 0 corresponds to the factory setting and is regenerated auto-
matically in the APSt function (All Preset). All changes in parameters or structures in relation to
the factory setting automatically set S0 from 0 to 1.
The structure switches S1 and S2 are fundamentally significant. With S1 the controller type is
set and thus the processing of command variable, main controlled variable and auxiliary con-
trolled variables up to control difference generation determined. With S2 the controller output
structure is set and thus the processing of the automatic-, manual-, safety- and follow--up vari-
ables as well as the manipulated variable output determined as a K- or S-output.
1.5.1
Analog input signal processing permanently connected
(S3 to S21, S200 to 205)
In the structure switch setting S4=0 the analog input range is permanently connected
(see figure 1-5, page 24). With S4=1 the permanent connection is canceled and converted into
a freely connectable input range (see chapter 1.5.2, page 25).
Every one of the maximum 11 analog inputs is fed through an AD converter which performs the
50 or 60 Hz interference suppression by averaging over 20 or 16 2/3 ms. After this the signal
range 0 to 20 mA or 4 to 20 mA is normalized to 0 to 100% calculated value per channel with
S5 to S9 or S200 to S205.
At the same time it is decided with S5 to S9 or S200 to S205 whether operation is to take place
with or without range monitoring (transmitter fault). The monitor signals per channel on dropping
below --2.5 % or exc106.25 % with a hysteresis of 0.25 % to the digital x and w display.
By an OR link of all single messages the group transmitter fault MUF is formed which can be
assigned to the digital outputs and negated optionally (see chapter 1.5.8, page 121). Only the
analog inputs selected with the transmitter fault monitor are monitored, displayed on the front
panel (the appropriate position stays dark in the case of analog inputs not selected with trans-
mitter fault) and signaled with the OR link. The error message is acknowledged with the Shift
key (12). The fault message signal via the OR link is available until the appropriate analog in-
puts are back in the working range.
After the range monitoring the 11 analog inputs are fed through a 1st order filter which can be
set by the parameters tF1 to tFb in the range of oFF, 0.1 to 1000 s in the parameterization
mode onPA. The factory setting is 1 s.
With S10 to S14 or S206 to S211 every channel can now be root extracted optionally. After root
extraction, the 11 analog inputs are available for further processing as AEA1 to AEbA.
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