Siemens Simatic S7-1500 Function Manual page 40

Cycle and response times

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Reducing additional system load

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

Cycle and response times

Function Manual, 10/2018, A5E03461504-AD

Cyclic program execution

3.2 Cycle time

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