PROFIdrive

• Информационные материалы

  Информационные материалы

  

  PROFIdrive – the standardized drive interface for PROFINET and PROFIBUS

  PROFIdrive defines the device behavior and technique to access internal device data for electric drives connected to PROFINET and PROFIBUS – from basic frequency inverters up to high-performance servo controllers.

  It describes in detail the practical use of communication functions – slave-to-slave data transfer, equidistance and clock cycle synchronization (isochronous mode) in drive applications. In addition, it specifies all device characteristics which influence interfaces connected to a controller over PROFINET or PROFIBUS. This also includes the state machine (sequence control), the encoder interface, scaling of values, definition of standard telegrams, access to drive parameters etc.

  The PROFIdrive profile supports both central as well as distributed motion control concepts.

  What are profiles?

  For devices and systems used in automation technology, profiles define properties and modes of behavior. This allows manufacturers and users to define common standards. Devices and systems that comply with such a cross-manufacturer profile, are interoperable on a fieldbus and, to a certain degree, can be interchanged.

  Are there different types of profiles?

  A distinction is made between what are known as application profiles (general or specific) and system profiles:

  • Application profiles (also device profiles) predominantly refer to devices (e.g. drives) and include and agreed selection regarding bus communication as well as also specific device applications.
  • System profiles describe classes of systems, including master functionality, program interfaces and integration resources.

  Is PROFIdrive fit for the future?

  PROFIdrive has been specified by the PROFIBUS and PROFINET International (PI) user organization, and is specified as a standard that is fit for the future through standard IEC 61800-7.

  The basic philosophy: Keep it simple

  The PROFIdrive profile tries to keep the drive interface as simple as possible and free from technology functions. As a result of this philosophy, referencing models as well as the functionality and performance of the PROFINET/PROFIBUS master have either no influence or only a low influence on the drive interface.

  One drive profile – different application classes

  The integration of drives into automation solutions depends very strongly on the particular drive application. In order to be able to address the complete, huge bandwidth of drive applications – from basic frequency inverters up to synchronized multi-axis systems with a high dynamic performance – using just one profile, PROFIdrive defines six application classes, to which most drive applications can be assigned:

  • Class 1 - standard drives (for example pumps, fans, agitators etc..)
  • Class 2 - standard drives with technological functions
  • Class 3 - positioning drives
  • Class 4 - motion control drives with central, higher-level motion control intelligence and the patented "Dynamic Servo Control" positioning concept
  • Class 5 - motion control drives with central, higher-level motion control intelligence and position setpoint interface
  • Class 6 - motion control drives with distributed motion control intelligence integrated in the drives

  Дизайн

  The device model of PROFIdrive

  PROFIdrive defines a device model based on function modules which cooperate in the device and generate the intelligence of the drive system. These modules have objects assigned to them which are described in the profile and are defined with respect to their functions. The overall functionality of a drive is therefore described through the sum of its parameters.

  In contrast to other drive profiles, PROFIdrive defines only the access mechanisms to the parameters as well as a subset of profile parameters (approx. 30) such as the fault buffer, drive control and device identification.

  All other parameters are vendor-specific which gives drive manufacturers great flexibility with respect to implementing function modules. The elements of a parameter are accessed acyclically via data records.

  As a communication protocol, PROFIdrive uses DP-V0, DP-V1, and the DP-V2 expansions for PROFIBUS including the functions "Slave-to-Slave Communication" and "Isochronous Operation", or PROFINET IO with real-time classes RT and IRT.

  

  Дальнейшая информация

  Further information on PROFINET and PROFIBUS is available at
  http://www.profibus.com