Siemens SIMATIC Power Line Booster Operating Instructions Manual page 74

PROFINET/Ethernet
5.3 Timing and runtimes
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③
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Figure 5-2
74
Cycle of the controller at which it can process IO data.
PROFINET update time that is configured between controller and device.
PLB cycle at which the powerline system forwards data to the slaves. This cycle is independent
of the number of slaves and from interference. You can assume 400 ms for this cycle.
PROFINET update time that is configured between controller and device.
Cycle between vehicle controller and the devices.
Example consideration of cycles between plant and vehicle controller
Operating Instructions, 11/2019, A5E36203125A-AG
Power Line Booster