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Switchgroups
SGR1...9
Example of
checksum
calculation
The switchgroups SGR1...9 serve for con-
figuring the start and trip signals of the protec-
tion stages as desired output signals SS1...SS4
or TS1...TS4.
The matrix below can be used for the program-
ming. The start and trip signals are linked to
the desired output signal SS1...SS4 or TS1...
output signal
operation stage
switch-
group
SGR1
t 1
SGR2
t 1 '
SGR3
t 2
SGR4
t 2 '
SGR5
t 3
SGR6
t 3 '
SGR7
t 4
SGR8
t 4 '
SGR9
recovery
function
weighting factor
Fig. 5. Output relay matrix for relay module SPCF 1D15.
Switch
SGF1/1
SGF1/2
SGF1/3
SGF1/4
SGF1/5
SGF1/6
SGF1/7
SGF1/8
Checksum ∑ of switchgroup SGF1
TS4, for example, by circling the intersection
of the signal lines. Each intersection is marked
with the number of the switch to be used and
the weighting factor of the switch is given un-
der the matrix. By adding the weighting factors
of the switches selected in each switchgroup, the
checksums shown to the right of the matrix are
received.
SS1 TS1 SS2 TS2 SS3 TS3 SS4 TS4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
4
8
Weighting factor
1
x
2
x
4
x
8
x
16
x
32
x
64
x
128
x
Checksum
(Default setting)
Σ SGR1=
5
6
7
8
(Σ=2)
Σ SGR2=
5
6
7
8
(Σ=0)
Σ SGR3=
5
6
7
8
(Σ=1)
Σ SGR4=
5
6
7
8
(Σ=0)
Σ SGR5=
5
6
7
8
(Σ=8)
Σ SGR6=
5
6
7
8
(Σ=0)
Σ SGR7=
5
6
7
8
(Σ=8)
Σ SGR8=
5
6
7
8
(Σ=0)
Σ SGR9=
5
6
7
8
(Σ=0)
16
32
64
128
Position
Value
1
=
1
0
=
0
1
=
4
0
=
0
0
=
0
0
=
0
1
=
64
0
=
0
69
13
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