Functions
5.6 PROFINET with performance upgrade
PROFINET with STEP 7 V15
196 Function Manual, 12/2017, A5E03444486-AH
3. Select the option "Cable length" or "Signal delay:".
4. Select the cable length or enter the signal delay.
Figure 5-62 Optimizing port settings for low send clocks
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 5-63 Allowing fast forwarding
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