Siemens SIMATIC PROFINET Function Manual page 191

4. Make the following settings in the I/O addresses area:
– Select the "Isochronous mode" option.
– Select a process image partition, e.g., process image partition 1.
– Click on the "Assigned organization block" in the drop-down list and click the "Add
– Select the "Synchronous Cycle" OB and confirm the selection with "OK".
5. Add other IO devices as required in the network view and adapt the configuration and the
isochronous mode settings.
6. To retrieve information about calculated bandwidths or to adapt the send clock, select the
subnet and navigate to the corresponding area of the domain management in the
Inspector window.
PROFINET with STEP 7 V14
Function Manual, 09/2016, A5E03444486-AG
object" button, or select an already existing OB.
Figure 5-71 Creating the organization block for programming isochronous mode
A dialog box for selecting organization blocks opens.
In the case of automatic number assignment, OB 61 will be generated and opened.
The "Isochronous mode" area is selected in the Inspector window, and you can
continue directly with the setting of the application cycle and delay time and start the
programming of the OB in the instruction section.
Functions
5.7 Isochronous mode
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