Communication PROFIBUS DP/PROFINET IO 10.1 Communications according to PROFIdrive

Application class 4 (central motion control)

This application class defines a speed setpoint interface with execution of the speed control on the drive and of the positioning control in the controller, such as is required for robotics and machine tool applications with coordinated motions on multiple drives.

Motion control is primarily implemented by means of a central numerical controller (CNC). The position control loop is closed via the bus. The synchronization of the position control cycles in the control and in the closed-loop controllers in the drive requires a clock synchronization of the kind that is provided by PROFIBUS DP and PROFINET IO with IRT.

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Figure 10-4 Application class 4

Dynamic Servo Control (DSC)

The PFOFIdrive profile contains the "Dynamic Servo Control" control concept. This can be used to significantly increase the dynamic stability of the position control loop in application class 4 with simple means.

For this purpose, the deadtime that is typical for a speed setpoint interface is minimized by an additional measure (see also chapter "Dynamic Servo Control").

Selection of telegrams as a function of the application class

The telegrams listed in the table below (see also chapter "Telegrams and process data") can be used in the following application classes:

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Drive Functions

Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

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Efficient Networks S120 manual Application class 4 central motion control, Dynamic Servo Control DSC