Siemens SIMATIC ET 200AL, System Manual

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Functions
5.10 Standard machine projects
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
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The figure below shows the initial configuration of the transport system shown above, which
is to permit the order of the connected IO devices to be changed via the user program. In the
example, the order of IO-Device_2 and IO-Device_3 is to be controlled via the user program.
Figure 5-104 Example configuration: Configuring flexible order of IO devices
To determine how the partner port settings are to be selected, you must note for each device
and each port of a device which partner can be interconnected.
•
If the partner is always the same in the different configurations provided, you select the
partner port for this partner.
• If the partners vary in the different configurations, you select "Setting partner by user
program".
For the example in the figure above, the following port settings result:
Device Local port Partner port setting Explanation
PLC_1 p1 p1 (IO device_1) Partner of PLC_1 at port 1 is IO
device_1 (always)
IO device_1 p1 p1 (PLC_1) Partner of IO device_1 at port 1 is
PLC_1 (always)
IO device_1 p2 Partner is set by user pro-
gram
Partner of IO device_1 at port 2 is
either IO device_2 or IO device_3
=> Setting partner by user pro-
gram
IO device_2 p1 Partner is set by user pro-
gram
Partner of IO device_2 at port 1 is
either IO device_1 or IO device_3
=> Setting partner by user pro-
gram
IO device_2 p2 Partner is set by user pro-
gram
Partner of IO device_2 at port 2 is
either IO device_3 or IO device_4
=> Setting partner by user pro-
gram
IO device_3 p1 Partner is set by user pro-
gram
Partner of IO device_3 at port 1 is
either IO device_2 or IO device_1
=> Setting partner by user pro-
gram