How often the data transfer between drive and drivecliq encoder occurs?

I need to know how often the data transfer between drive and drivecliq encoder occurs.

I have S-120 (servo)  + drivecliq encoder in my setup. 

Let's say that p115[1] for speed controller is 1000.0 us and p115[5] for positioning is 4000.0 us.

Does it means that every 1 ms data exchange between module and encoder occurs to receive velocity feedback?

I think it only means that this position loop (error, P controller ) is calculated by internal DSP. 

Does the drivecliq interface check that encoder is really connected to drive module (cycling live bit or something)?

Basically I want to lower the transmission rate as much as possible.

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Split from DriveCliq transmission rate.