-
-
-
N O T I C E
When line topology is used, take precautions to avoid timeout in the PLC when more than 8 drives are installed in series. Each
drive in the network adds a small delay to the communication due to the built-in Ethernet switch. When the update time is too
short, the delay can lead to a timeout in the PLC.
Set the update time as shown in the table. The numbers given are typical values and can vary from installation to installation.
Number of drives connected in series
Minimum update time [ms]
<8
2
8–16
4
16–32
8
33–50
16
>50
Not recommended
N O T I C E
Using tools such as MyDrive
®
Insight may influence system performance in a line topology.
e3
0b
k8
12
.1
0
Illustration 3: Example of Line Topology
N O T I C E
Installing drives of different current ratings in line topology may result in unwanted power-off behavior.
Mount the drives with the longest discharge time first in the line topology. In normal operation, the drives with bigger cur-
rent ratings have a longer discharge time.
2.6.2 Star Topology
In a star network, all devices are connected to the same switch or switches. Star topology reduces the damage caused by single
cable failure. In a star topology, a single cable failure affects a single drive instead of all drives. In many applications, this topology
enables simpler cabling depending on the location and distance of the device.
AQ408626183394en-000101 / 136R0280 | 17
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