Introduction

For PAC with CPU firmware 3.10 or earlier:

The NTP service configuration is required to allow a safe communication. Both safe senders and receivers need to be time synchronized using NTP services.
For PAC With CPU firmware 3.20 or later:

The safe time synchronization is based on an internal and "monotonic" time clock. The safe communication does not need an NTP time synchronization:

  • The Safety CPU is sharing its safe time with all its local and remote IOs.

  • The remote IO head communication module BM•CRA31210 need a firmware 2.60 or later.

  • For a peer to peer communication, CPU are sharing their safety time.