Basic Functions (Arithmetic Blocks B); General - Siemens SIPART DR24 Manual

1 Technical Description
1.5 Functional Description

1.5.7 Basic Functions (Arithmetic blocks b)

1.5.7 Basic Functions (Arithmetic blocks b)

1.5.7.1 General

In the SIPART DR24 a library of basic functions is stored (see figure 1--18, page 42). These
basic functions can be assigned in any order to the (initially empty) 109 arithmetic blocks (see
configuring mode FdEF, chapter 3.3.6, page 152). Every basic function is marked by a short
name which appears in the FdEF cycle on dd1.
Every arithmetic block b**.F (** corresponds to 01--h9) has up to 3 inputs (data sinks) E1, E2,
E3 and one output (data source) A. Depending on the kind of function, the input and output vari-
ables are digital (identification #, dotted lines) or analog (identification ∩, continuous lines).
The unassigned inputs (data sinks) of the functions (ncon: not connected) must be linked with
data sources in the configuring mode FCon. Some data sinks are defaulted with values or log-
ical signals (Hi, Lo), which correspond to frequent applications. These inputs can be overwritten
in the FCon mode or their defaulting retained.
Meter number of the
arithmetic block b
b .F Function name
--
E
.1
1
E .2
2
E .3
3
Inputs
Data sink
∩ analog variable, # binary variable
Figure 1--17 Format of an arithmetic block
b .F AbS
--
.1
∩ A
ncon
A = |E1|
b .F AMPL
--
.1
ncon ∩
+
-
ncon .2
∩
.3
∩
1.000
A=(E1-E2) ⋅ E3
b .F bSo
--
.1
#
ncon
.2
#
ncon
.3
#
Lo
Figure 1--18 Basic functions of the SIPART DR24
42
No. in the cycle
n
---
A
.A
Outputs
Data sources
b
n
---
ncon
∩
.A ncon
∩ ∩
E
∩
0.000
A = E1+E2+E3
b
n ---
--
#
ncon
ncon
.A
#
∩
x
#
Hi
A = E1 ∧ E2 ∧ E3
b
n ---
--
ncon
∩
ncon
.A #
∩
0.010
∩
A = Hi if E1 ≥ E2+H/2
E3 Hysteresis
.F Add
--
.1
+
.2
+
.3
+
.F And
.1
.2 &
.3
CoMP
.F
.1
+
-
.2
H
.3
b .F
n ---
--
.1
ncon ∩
.A
∩ Lo # .2
E2 = Hi (t = 0) ! A = E1 (t = 0)
E2 = Lo, A = E1
b .F
n ---
--
.1
ncon ∩
.A #
ncon .2
∩
# .3
Lo
b .F
n ---
--
Lo
.1
#
m
.A # ncon
# .2
.3
#
Lo
E2: metering pulse (pos. edge)
E3: Reset (pos. edge)
E1 = Hi: block; m = 0001
SIPART DR24 6DR2410
C79000-G7476-C153-03
Manual
AMEM
n ---
.A
∩
ASo
n ---
.A
∩
CoUn
n ---
+m
&
CT
.A
∩
R