Introduction To The SERCOS interfaceâ¢ - Sercos N.A.

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This figure illustrates a system with communication to a higher-level factory network, a fieldbus for I/O and the SERCOS II interface for real-time motion control. XI. Conformance Testing for SERCOS interface Products Products with the SERCOS interface are tested at the Institute for Control Engineering of Machine Tools and Manufacturing Units (ISW) at the University of Stuttgart. The aim of the conformance test is to ensure the compatibility and interoperability of SERCOS interface devices from different vendors in multiple vendor environments. Testing to the SERCOS I & II Conformance Class A and B levels, plus testing for conformance to the SERCOS Packaging Profile, are presently available. Conformance tests for SERCOS III are now in development. Only products that have passed the conformance test are allowed to carry the SERCOS Conformance-tested logo. Introduction to the SERCOS interface -- Sept. 2006 -- Page 10
X. Ideal for Distributed Multi-axis Control Systems The SERCOS interface is a foundation for building distributed multi-axis control systems for a myriad of applications. Distributed control improves machine flexibility by moving processing power and decision making from the CNC or motion control down into the drives and sensors. These devices then become intelligent building blocks that can easily be added to a machine or production line without major changes in hardware and software. The SERCOS interface is well suited for distributed control because it places axisdependent control functions, such as loop closures, interpolation and registration, in the drives, not in the motion controller. Thus, motion controllers can concentrate on motion control profiles and toolpaths independent of the axes. In operation, the control issues a position command to the drive, which then closes its own loops and micro-interpolates its trajectory, based on previously downloaded parameters. The SERCOS interface also integrates input/output functions such as limit switches, pushbuttons and various sensors. XI. SERCOS interface Packaging Profile Packaging applications have benefited greatly from the adoption of the SERCOS interface in controls and drives. Many packaging machinery manufacturers are shipping machines today that were designed from the ground up using servo technology, in which hundreds of mechanical components have been eliminated, costs have been reduced and flexibility has been maximized. The OMAC (Open Modular Architecture Controls) Packaging Workgroup published a recommendation in November 2001 to use SERCOS interface (IEC 61491) as an open drive interface for packaging machines. In this context, the group challenged the SERCOS organization to further improve the multi-vendor interoperability of servo controls and drives on the basis of a packaging profile. The SERCOS organizations responded by creating a packaging profile that defines a subset of the SERCOS interface parameters that are applicable to packaging machines. The SERCOS interface specifies more than 500 standardized parameters that define the interaction between controls and drives in a vendor-independent manner. The SERCOS specification supports the interoperability of controls, drives and I/O devices from different manufacturers on the basis of an open real-time communication system. However, in practice, issues arise which make the idea of “plug and play” more difficult to implement. Only a subset of all existing parameters is needed for most applications, as some parameters have been designed for very specific use only (i.e., spindle positioning in machine tools), or they deal with optional interfaces (e.g., position feedback value of an external feedback). Thus, not all vendors implement all parameters in every device they produce. Introduction to the SERCOS interface -- Sept. 2006 -- Page 11
Page 1 and 2: I. General Description Introduction
Page 3 and 4: III. Three Generations of the SERCO
Page 5 and 6: the motion bus, and use Ethernet ha
Page 7 and 8: B. Communications Structure In orde
Page 9: VIII. Differences and Similarities
Page 13 and 14: Typical applications for such a pro

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Introduction To The SERCOS interfaceâ¢ - Sercos N.A.