Setting The Bandwidth Usage For The Send Clock - Siemens SIMATIC PROFINET Function Manual

Functions
5.5 Real-time communication
5.5.6

Setting the bandwidth usage for the send clock

Bandwidth level
For PROFINET IO with IRT, you can specify the maximum portion of the send cycle that you
want to use for cyclic IO communication.
You have the following setting options for the bandwidth usage in STEP 7.
● Maximum 25% cyclic IO data. Focus on non-cyclic data.
● Maximum 37.5% cyclic IO data. Focus on non-cyclic data.
● Maximum 50% cyclic IO data. Balanced proportion.
● Maximum 90% cyclic IO data. Focus on cyclic IO data. (Requirement: The "Make 'high
performance' possible" option is activated)
Setting the bandwidth usage
To set the bandwidth usage for a PROFINET IO system in STEP 7, follow these steps:
1. Select your 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" > "Details".
3. Select the desired level of bandwidth usage from the "Bandwidth use" drop-drop down list
box.
Figure 5-49 Setting the bandwidth usage
For information on how to set the bandwidth usage for IRT with maximum performance, refer
to the section Configuration of IRT with high performance (Page 177)
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PROFINET with STEP 7 V14
Function Manual, 09/2016, A5E03444486-AG