Siemens Simatic S7-1500 Function Manual page 26

Causes of different cycle times
The figure below shows the different cycle times T
Because the cyclic program is interrupted by a cyclic interrupt OB in this example (for
example: OB 30), the cycle time T
interrupted by Motion Control functions and communication.
Figure 3-3
Cycle and response times
Function Manual, 10/2018, A5E03461504-AD
cyc2
Possible causes of differing cycle times
and T
cyc1 cyc2
is greater than T . The cyclic interrupt OB in turn is
cyc1
Cyclic program execution
3.2 Cycle time
using an example.
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