[etherlab-users] ecrt_slave_config_dc sync0_shift

[Greier, Thomas]

Hello,
How is the sync0_shift argument used in ecrt_slave_config_dc?

I currently am using 1.5.2 version of the master with one slave device in master-shift DC mode.

The slave is synchronizing successfully. However, when I probe the SM2 and SYNC0 interrupts on the slave, I see that the location of the SM2 interrupt within two SYNC0 interrupts is non-deterministic.  In other words, it changes every time the master and slave resynchronize. I would have expected the location of the SM2 interrupt (as far as its timing) to follow the sync0_shift offset from the SYNC0 interrupt.

I am running at 1kHz SYNC0 frequency and specifying a 200us sync0_shift.

Thank you in advance for your help.

Tom


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