Goodrive600 series high-performance multifunction VFD
Communication networking
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In addition to shielded twisted pair copper wire transmission, PROFIBUS can also be used for fiber optic transmission to
increase the distance of high-speed transmission especially in environments with high electromagnetic interference. Two
types of fiber optic conductors can be used: an inexpensive plastic fiber conductor for transmission in a distance of less
than 50 meters and a glass fiber conductor for transmission in a distance of less than 1 kilometer.
6.5.4 Network topology
In this network, the PLC or another master device connects only to the rectifier unit that has been inserted with a
PROFIBUS-DP communication card, and the rectifier unit connects to other units through RJ45 since it converts the
communication card bus to CANopen bus.
Rectifier unit
Inverter unit 1
Inverter unit 2
Inverter unit
N
...
A
B
A
B
A
B
A
B
DP
communication
card
PLC
Figure 6-5 PROFIBUS-DP-to-CANopen network topology
Note: In the networking wiring, the RJ45 ports between units must be cross-connected, that is, port A of a unit
can only be connected to port B of another unit. If the connection is incorrect, the communication performance
of the entire system will be degraded.
6.5.5 Communication performance
One DP bridge unit can support 21 CANopen slave nodes, and the bridge unit itself is also considered as a CANopen
slave node. One bridge unit interacts with the PLC up to 128 bytes each time. At the same time, the number of slaves
supported by the DP bridge is limited by the number of nodes supported by the PLC. Generally Siemens PLC allows
more than 21 slave nodes, and therefore you only need to consider the number limited by the bridge itself.
6.5.6 Commissioning procedure
6.5.6.1 Commissioning flowchart
Figure 6-6 shows the commissioning procedure.
