PROFINET Forum

Configuration of TSN networks might be a challenge (depending on the network). How relevant might PROFINET cycle times below 250 microseconds be for the PROFINET market in future (with and without TSN support)?

Webinar_Question wrote: ↑23 Jul 2024, 11:16 Configuration of TSN networks might be a challenge (depending on the network). How relevant might PROFINET cycle times below 250 microseconds be for the PROFINET market in future (with and without TSN support)?

The question is whether cycle times of less than 250µs make sense. As soon as something moves, the mass inertia is generally higher than a target position can be approached in 250µs, for example. There are clearly also a few applications that have purely e.g. current control and then a cycle time under 250µs can be interesting. But this is the exception.

PROFINET has addressed the performance issue and defined the DFP (Dynamic Frame Packing) function, for example. This makes it possible to address large quantities and many devices in the shortest possible cycle time. There is no need to wait for the TSN devices; you can buy development packages available today and operate your own devices on high-performance PLCs.

More important than the shortest update times of the device is the high precision of PROFINET in synchronization of IRT. Here the jitter is better than 1µs.