Siemens SIMATIC ET 200AL, System Manual

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Functions
5.12 Docking systems
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
283
Multiple IO devices as a docking unit ("Alternating partner port")
A docking unit may also consist of several IO devices connected in series. If you use
IO devices connected in series as a docking unit, ensure that the topology of the IO devices is
configured. A docking unit consisting of two IO devices connected in series (Tool_3_1 and
Tool_3_2) is shown at the bottom right in the figure below.
Figure 5-111 Docking system in the topology view of STEP 7
Restriction in the interconnection
The interconnection with a partner port is not possible in the following cases:
•
The partner port does not have a suitable type of cable. In this case, a media convertor
from the catalog must be inserted.
• The partner port is blocked (deactivated).
• The two ports that are to be interconnected belong to the same interface (it is only
possible to interconnect the ports from different interfaces in a station).
• The two ports that are to be interconnected belong to different Ethernet subnets.
Deleting interconnections
Select the port of the alternating partner and remove the interconnection with the "Remove"
button.