When I use the PCI-L221 motion control card, up to how many slaves can be connected simultaneously? What would I do if I need to connect more than the maximum slaves allowed?The PCI-L221 can communicate with and control up to 64 slaves via EtherCAT, including 32 axes of synchronous motion control of 1 ms. If the number of slaves connected exceeds the allowed maximum, you can connect another PCI-L221 motion control card for expansion.