dear Dirk, thank you for your answer

we found same question below the URL link and with your answer,
i can conclude that the cycle time depends on the hardware with cycle time can be 2ms to 4ms. in fact, I measured the cycle time myself, on my hardware the cycle time is approximate 3ms.
URL : https ...

I am working on a RevPi Core with EtherCAT gateway module use PiBridge for module connection
As the PiBridge specification, Pibridge data tranfer cycle time is 5ms as default
I want to ask that can i config this Cycle time on C program ?
I want to config the cycle time to 1ms or less than 1ms. Is it ...