Siemens 6DR2410, Manual

Page: 54 / 276

1 Technical Description
1.5 Functional Description
1.5.8 Complex Functions (Arithmetic blocks c, d, h)
Manual
52
SIPART DR24 6DR2410
C79000-G7476-C153-03
1.5.8 Complex Functions (Arithmetic blocks c, d, h)
1.5.8.1 General
In addition to the basic functions, the SIPART DR24 contains a number of complex function
blocks (Figure 1--21, page 53). The application frequency per function type is permanently de-
fined. The respective complex function block is assigned to specific arithmetic blocks (c, d, h)
as required in the programming mode FdEF (see chapter 3.3.6, page 152) as in the basic func-
tions. Every arithmetic block type can be assigned a different number of times (c: 33 times, d: 4
times, h: 4 times). Every function has a short name which appears in FdEF on dd1.
Frequently recurring problems are already realized in the complex function blocks; e.g. the PID
controller. Most of these solutions are stored several times; in this way the PID controllers
(blocks h) can be assigned a total of four times from the function supply of 12 functions for
example: CCn1, 4 (K--controller), CSi1, 4 (S--controller with internal feedback) or CSE1,4
(S--controller external position feedback).
There is no uniform number of inputs and outputs for the complex functions. It depends on the
function depth. Inputs and outputs are numbered consecutively and the outputs are identified by
A if this is technically possible in the display. As in the basic functions, many inputs are de-
faulted with numeric values or logical status signals in the complex functions. These inputs can
be overwritten in the FCon mode or their defaulting retained. The inputs which are not defaulted
are identified by ncon, i.e. they must be linked with data sources in the configuring mode FCon.
Inputs and outputs for analog signals are marked by
∩
, inputs and outputs for digital signals
are marked by #.
The complex functions have partly their own („private”) parameters which can be set as online
or offline parameters (see chapter 3.3.1, page 136 and 3.3.3, page 145). For example, the PID
controllers have the private parameters Kp, Tn and Tv among others.