Technical data

Technology objects
CPU 317T: Technology Functions
A5E00251798-03
3-5
3.1.4 "Axis" - "drive" difference
The "Axis" technology object forms the interface between the user program and the
drive. It receives motion control commands from the user program in the PLC, and
then executes and monitors their runtime.
The axis communicates on the PROFIBUS with the drive that contains the velocity
and power controller.
Drives are configured and commissioned separately from the axis.
Functional interface to the drive
The Technology CPU supports operation of digital drives (SIMODRIVE 611
universal, MASTERDRIVES MC, for example) via DP(DRIVE) interface and analog
drives via ADI4. The interface between the technology object and the drive
component is here formed by a specified telegram which must be selected and
configured according to the functionality of each component.
These telegrams are used to exchange data between the PLC (technology object)
and the drive component (drive, for example). Example: control words, status
signals or encoder information.
Note
An axis can only execute the functions the connected drive actually supports.
Available functions, for example, operation with SIMODRIVE 611U or
MASTERDRIVES MC, are described in the converter documentation; see also the
relevant product descriptions.