Siemens SIMATIC ET 200AL, System Manual

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Parameter assignment/addressing
3.5 Configuring topology
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
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3.5.4 Automatic assignment of devices by offline/online comparison
Overview
During the offline/online comparison, the configured topology is compared with the actual
existing topology. Devices identified online are automatically assigned to configured devices
as far as this is possible.
Start of availability detection
You start the availability detection the first time by clicking the "Compare offline/online"
button in the toolbar of the "Topology comparison" tab.
You restart availability detection by clicking the "Update" button.
Note
The availability detection can take several seconds. During this time, no user input is possible.
Automatic assignment of a PNIO device
A PNIO device identified online is automatically assigned to a configured device if the
following properties of the two devices match up:
•
Article no.
• Type
• PROFINET device name
No automatic assignment
In the following situations, no automatic assignment is possible:
•
No device can be identified online to match a configured device. (This means that the
corresponding columns in the "Online topology" area of the topology comparison table are
empty.)
In this case, you should add the already configured device to your system or delete the
configured device from the configuration.
• A device identified online can be assigned to a configured device, but there are
differences in the port interconnections.
In this case, you can Apply the port interconnections identified online manually to the
project (Page 1).
• A device identified online cannot be assigned to a configured device. (In this case, the
corresponding columns in the "Offline topology" area of the topology comparison table
are empty.)
In this case, you can Include the devices identified online manually in the project (Page 1).