Setting The Bandwidth Usage For The Send Clock - Siemens SIMATIC ET 200AL System Manual

3. Navigate to the device of the required sync domain in the Inspector window.
Figure 5-48 IRT configuring sync domain
4. Enter all necessary settings in the tables:
– Select an IO system.
– Set the synchronization role "sync master" for the IO controller.
– Set the RT class for the IO devices to "IRT". The IO devices will then automatically be
You can now load the configuration to the relevant devices with PROFINET IRT.
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)
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
assigned the synchronization role "sync slave".
Functions
5.5 Real-time communication
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