hello gentelmen,
there is single master EL6751 + single canopen slave .. in my case is the Sew EuroDrive lteb+ which has canopen port directly on board... I did el6751 master component and sew lteb+ component...
there is speed limitation of 4ms scan cycle but it is periodical ... it is defenetly no RT but for spindles with only speed control should be used...
enjoy