Application Classes - Siemens SINAMICS S150 NEMA Operating Instructions Manual

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6.7 Communication according to PROFIdrive

Isochronous mode

Drive object types

Can be used for

Cyclic operation

For additional information on interfaces IF1 and IF2, see Chapter "Parallel operation of

communication interfaces (Page 433)".

Application classes

There are different application classes for PROFIdrive according to the scope and type of the

application processes. PROFIdrive features a total of 6 application classes, the 3 most

important are considered here:

● Class 1 (AK1):

The drive is controlled using a speed setpoint via PROFIBUS/PROFINET. The complete

closed-loop speed control is realized in the drive itself.

Typical application examples include simple frequency converters for controlling pumps

● Class 3 (AK3):

In addition to the speed control, the drive also includes a positioning control, which

means that it operates as an autonomous single-axis positioning drive while the higher-

level technological processes are performed in the control system. Positioning requests

are transferred to the drive controller via PROFINET (or PROFIBUS) and started.

● Class 4 (AK4):

This PROFIdrive application class defines a speed setpoint interface where the closed-

loop speed control is executed in the drive and the closed-loop position control in the

control system. This is required for robotic and machine tool applications with coordinated

motion sequences distributed across several drives.

Motion control is primarily implemented using a central numerical controller (NC). The

position control loop is closed via the bus, i.e. the communication between the controller

and the drive must be isochronous.

SINAMICS Link

Operating Instructions, 12/2018, A5E36652151A

SINAMICS Link

Enclosed Drives