English to French Tech/Engineering Aerospace / Aviation / Space

Here is the sentence to get better understand.

When the aircraft has come to a standstill, the docking controller inside the Pilot Display Uni transmits the ONBLOCK time to the central computer and the system state is switched to the OnBlock state. To get the OFFBLOCK time, the system has to be activated to offblokdetection before the procedure.

I write it as it is in the source file. I do understand the meaning but cannot find a good translation of those. If anyone can help. Thank you very much.