Functions
5.7 Isochronous mode
PROFINET with STEP 7 V15
208 Function Manual, 12/2017, A5E03444486-AH
Setting the application cycle and delay time
Requirement
● You have created an isochronous mode configuration in STEP 7.
● You have created an isochronous mode interrupt OB.
● The isochronous mode interrupt OB is open.
Setting the application cycle and delay time
To set the application cycle for your isochronous mode application, follow these steps:
1. Open the "Properties" dialog associated with the relevant isochronous mode interrupt OB.
2. In the area navigation, click the "Isochronous mode" group .
3. Set the application cycle in "Application cycle (ms)". Open the drop-down list box and
select the application cycle. The drop-down list box offers multiples of the PROFINET
send cycle clock as possible values for the application cycle. The PROFINET send cycle
clock is set to 2 ms in the following figure.
Figure 5-72 Setting the application cycle
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