Profidrive Application Classes - Siemens SINAMICS S120 Function Manual

Communication
11.1 Communication according to PROFIdrive
11.1.1

PROFIdrive 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 compared here.
● Class 1 (AK1):
The drive is controlled using a speed setpoint via PROFIBUS/PROFINET. In this case,
speed control is fully handled in the drive.
Typical application examples include simple frequency converters for controlling pumps
and fans.
● 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 speed
control is realized in the drive and the closed-loop position control in the control system,
such as is required for robotics and machine tool applications with coordinated motion
sequences on multiple 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.
Selection of telegrams depending on the PROFIdrive application class
The following Table provides an overview of which telegram can be used reach which
PROFIdrive application class:
Table 11- 4 Selection of telegrams depending on the PROFIdrive application class
Telegram Description
(p0922 = x)
1 Speed setpoint, 16-bit
2 Speed setpoint, 32-bit
3 Speed setpoint, 32-bit with 1 position encoder
4 Speed setpoint, 32-bit with 2 position encoders
5 Speed setpoint, 32 bit with 1 position encoder and Dynamic Ser-
vo Control
6 Speed setpoint, 32 bit with 2 position encoders and Dynamic
Servo Control
7 Basic positioner with selection of the traversing block
9 Basic positioner with direct setpoint input (MDI)
20 16-bit speed setpoint for VIK-Namur
81 Standard encoder
82 Standard encoder with speed actual value 16 bit
736
Class 1 Class 3
x -
x -
x -
x -
- -
- -
- x
- x
x -
- -
- -
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Class 4
-
-
x
x
x
x
-
-
-
-
-
Drive functions