You're reading the documentation for an obsolete version. For the latest released version, please have a look at mp1.3.

Servos

This section contains information on setup, configuration and operation of EtherCAT servos drives. Each external axis in MotionPlus is driven by a configured servo drive. The urcap has a realtime process that passes axis position information from URControl to the EtherCAT drive every cycle at 500Hz.