Device Profiles
The device profiles describe the application parameters and the functional behaviour of the devices including the device class-specific state machines. For many device classes, fieldbus technology already offers reliable device profiles, for example for I/O devices, drives or valves. EtherCAT supports both the CANopen device profile family as well as the drive profile known as the Sercos drive profile. Since the application view does not change when migrating from CANopen or Sercos, this assists users and device manufacturers alike.
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—Noam Chomsky (b. 1928)