Siemens SIMATIC ET 200AL, System Manual

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Functions
5.9 Device replacement without exchangeable medium
PROFINET with STEP 7
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Function Manual, 05/2021, A5E03444486-AL
Principles of name assignment
The failure of the "Mill" IO device is considered here.
1.
The IO controller queries the device name of the replaced IO device.
2. The IO controller detects that the IO device with the device alias "port-002.Press" does not
have a device name.
3. The IO controller assigns the device name "Mill" to the replaced IO device via the device alias
"port-002.Press" of the failed IO devices.
Note
If you insert a device with the Device replacement without exchangeable medium/PG
PROFINET functionality at a different location than the configuration, a different device
name is then assigned to the device.
Reset a wrongly inserted device to delivery state before you use it again.
5.9.2 Replacing an IO device without exchangeable medium
Introduction
Replacement of IO devices is sometimes frequently required in automation systems. The
IO devices are generally assigned a device name by either inserting an exchangeable medium
or via the programming device. The CPU identifies the IO device by using these device names.
Under certain circumstances, replacing an IO device can be done without inserting an
exchangeable medium or without the PG.
Requirements
• The topology of the PROFINET IO system with the respective IO devices must be
configured.
By configuring the topology, the neighbor relationships of all the PROFINET devices
located in the PROFINET IO system are announced to the PROFINET IO system or the
IO controller. From the neighbor relationships specified by the set topology and the actual
neighbor relationships established by the real PROFINET devices, the IO controller can
identify the replaced IO device without a name and assign to it the configured name and
the IP address and then again list it in the user data traffic.
• The affected IO devices in the automation system must support device replacement
without exchangeable medium.
If the individual IO devices in the automation system do not support device replacement
without exchangeable medium, a corresponding alarm is output for the IO device.
Note
Use only new IO devices as replacements or restore configured IO devices to their delivery
state.