You reduce the communication load at the 2nd PROFINET interface, e.g. with:
● Fewer HMI devices or slower update cycles of the HMI devices
● Less or slower communication with other CPUs
Increase the update times in STEP 7 for all IO devices that are assigned to the 2nd
PROFINET interface (X2):
1. Select the "IO Communication" in the "Network view" of STEP 7.
2. Set the "Update mode" parameter to "Adjustable".
3. Select a higher value for the "Update time [ms]" parameter in the drop-down list.
4. Repeat this setting for the other IO devices.
Figure 3-8 Increasing update times
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