Functions
5.6 PROFINET with performance upgrade
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
215
Allowing fast forwarding
Requirements:
•
The PROFINET IO device has to support the fast forwarding process so that the process can
be used by the device.
•
The "Make 'high performance' possible" option is enabled.
•
The PROFINET IO interface supports fast forwarding if all the ports except one are
deactivated.
Follow these steps to allow fast forwarding:
1.
Select the PROFINET IO system in the network view of STEP 7.
2.
In the Inspector window, go to "Properties" > "General" > "PROFINET" > "Domain
management" > "Sync domains" > "Name of the sync domain".
3.
Enable the "Allows the use of ‘fast forwarding'" option.
Figure 5-68 Allowing fast forwarding
Note
Fast forwarding and IPv6
The operation of fast forwarding in combination with IPv6 is not supported.
As soon as an IO device in the subnet uses an IPv6 address, you must not activate "fast
forwarding".
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