8.2
Network topologies
Segmentation of the system
SEGMENT 2
BP1
BP2
BP3
BPk
BPj
Ethernet
Line
Topology
max. 100m
SC
SC
SC
SC
SC
SC
SC
SC
Segment
Controller
2)
SEGMENT 1
BP1
BP2
BP3
BPj
BPm
BPk
Ethernet
Ring
Topology
max. 100m
SC
SC
SC
SC
SC
SC
SC
SC
Segment
Controller
2)
B
P
4
B
P
5
SEGMENT M
BP1
BP2
BP3
BPi
BPk
BPj
Ethernet
Ring
Topology
max. 100m
SC
SC
SC
SC
SC
SC
SC
SC
Segment
Controller
2)
Max. 100m
Network
Segment Switch
(RSTP)
Main network switch
FO Switch
FO Switch
Fiber
Splicebox
Splicebox
Internet
Network
Segment Switch
(RSTP)
Gateway
VPN 3G/4G Router
B
P
4
B
P
5
BPi
B
P
4
B
P
5
max. 100 nodes/segment
typ. 10MW/segment
Legend:
SC: String Combiner
BP: blueplanet 87.0-
165TL3 Inverter
1): meteocontrol blue’Log XC
2): meteocontrol blue’Log XM
RS485
DC
RSTP: Rapid Spanning Tree
Protocol
MQTT
MODBUS/TCP
FTP
HTTP(S)
MODBUS/RTU
MQTT: Messge Queuing
Telemetry Transport
Plant
Controller
1)
HTTP(S)
Cloud
meteocontrol Portal
WEB-
Server
Database-
Server
App-
Server
XMPP
Service
User
HTTP(S)
1
2
5
3
4
6
7
8
9
10
Fig. 37:
Segmentation of a plant
1 Gateway VPN 3G/4G router
6 Network segment switch
2 Main network switch
7 Inverter device
3 FO - switch (fibre optic)
8 String combiner
4 Slicebox (for fibre optic data transfer)
9 Connection cable and protocol
- DC / Modbus RTU / RS485
5 Segment Controller
10 Plant Controller
This illustration shows a possible variant for multiple segments. Depending on the local conditions, a different positioning
of the components may also be preferable (e.g. position
segment controller
at a central location and connect in
the segment switch via glass fibre cable).
Located directly after the Gateway VPN-Router, is the
main network switch
via which the
segment control-
ler
is connected in. With the corresponding system size (distance from
main network switch
to the
segment
controller
>100 m), it may also be necessary to connect in segments that are further away via a glass fibre connec-
tion.
Within a segment, the KACO devices can be coupled to one another via the integrated switch in an Ethernet daisy chain,
whereby the segment controller is connected to the first element of the chain. This topology is displayed in segment 2, for
example. A
Segment Controller
can manage up to 100 nodes. A node in this sense is any data source that is mon-
itored by the
Segment Controller
. (Example: 45 pairs consisting of inverter and string combiner (90 nodes) + 10 re-
serve nodes for other substation/segment data sources)
If additional failure safety is desirable, the KACO devices can also be arranged in a ring via a correspondingly configured
Network Segment Switch
(that supports the Rapid Spanning Tree Protocol "RSTP"). This switch is then also coupled
to the
Segment Controller
. This configuration is shown as an example in segments 1 and M.
As can be seen in the figure, a
string combiner
is assigned to each KACO device. In terms of communication, these
are coupled in directly to the device via an RS485 cable (green cable). MODBUS RTU is used as the communication pro-
tocol for this purpose. The monitoring of the
string combiner
is also carried out via the
Segment Controller
,
whereby the KACO device undertakes the role of a MODBUS gateway. The
string combiner
must be coupled using a
DC–Combiner
.
Manual
Commissioning | 8
KACO blueplanet 100 TL3
Page 33
EN
