What is the best RPI adjustment, for using a BMECXM0100 Can Open master?

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Our Can-Open master coupler "BMECXM0100" is configured as a DIO device. The Ethernet RPI of the DIO Scanner must be over twice as fast as the CPU's MAST task. (This is to guarantee Shannon's theorem).
The MAST task of the CPU can be configured in Cyclic or Periodic mode.
 As a reminder, the RPI is set through the DTM. Do not exceed the maximum bandwidth of the Ethernet port of the scanner.
If the bandwidth of the IOscanner DIO is not sufficient, the BMECXM0100 coupler will have to  be deployed behind a second Ethernet coupler.