Network Topologies; Overview; Line Topology - Danfoss iC7-Marine PROFINET Operating Manual

Operating Guide | iC7-Marine PROFINET
Slot 0 Slot 1
Device Application
Propulsion & Machinery
Subslot Subslot
0x0001 0x0001
DAP MAP
Figure 2: Example of a PROFINET Device Model with Functional Extension Options Installed in an iC7-Marine Drive

Network Topologies

2.8

Overview

2.8.1
Communication interface X1/X2 is used for fieldbus connection.
The communication interface in the iC7 drives and power converters has 2 Ethernet ports (X1 and X2) and an embedded switch with 2
Ethernet RJ45 connectors. It has 1 MAC and IP address, and is considered a single device in the network. The communication interface
supports 3 network topologies:

Line topology

l
Star topology
l
Ring topology
l
Line Topology
2.8.2
In many applications, line topology enables simpler cabling and the use of fewer Ethernet switches. Observe network performance and
the number of devices in a line topology. Too many devices in a line may exceed network update time limits.
When line topology is used, take precautions to avoid timeout in the PLC when more than 8 drives or power converters are
installed in series. Each drive or power converter 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.
l
Number of units connected in series
<8
8–16
16–32
33–50
>50
NOTE:
Using tools such as MyDrive® Insight may influence system performance in a line topology.
20
| Danfoss Drives Oy © 2024.04
Basic I/O (+BDBA)
Subslot Subslot
0x0002 0x0001
iC Speed MAP
Profile
Slot 2
Option
Subslot Subslot
...
0x0002 0x0012
Basic I/O Basic I/O
Relay AIN
T2 T34
NOTICE
Minimum update time [ms]
2
4
8
16
Not recommended
Slot 3
Option
General Purpose I/O OC7C0
Subslot Subslot Subslot
...
0x0001 0x0002 0x0009
MAP General General
Purpose Purpose
I/O I/O
AIN DIN
T2 T13
AQ481922043454en-000101 / 172K4282A