Sercos III is the third generation of the SERCOS interface number according to IEC / EN 61491 on the basis of standard Ethernet IEEE 802.3. sercos III has been filed with the IEC ( International Electric / Electro -technical Commission ) for worldwide standardization and is thus part of the international standard IEC 61800-7, IEC 61784 and IEC 61158.

Sercos is internationally active support of over 50 control and 30 drive manufacturers. The development of standards is carried out within the user organization sercos International ( SI). It monitors global compliance standards and provides members with support for development, conformance testing, marketing, etc.

Sercos series

The digital drive interface sercos interface, introduced in 1985 in the market, has changed since the early 90s developed into a globally accepted standard for all motion control -based automation systems. Their attractiveness is based on the good properties in terms of real- time performance and noise immunity as well as the large range of products available to many providers. Since 1995 sercos interface is as IEC 61491, the worldwide standard for communication for motion control. For integrated interoperability in packaging machines, the application profile sercos PACK was defined profiles. sercos has an installed base of more than 2 million installed nodes sercos in about 350,000 applications worldwide.

Major characteristics of the sercos

  • Synchronization of up to 511 participants in a sercos III network
  • Network topologies in a ring or line structure
  • Synchronization of multiple sercos networks
  • Non- real-time channel (NRT ) for transferring standardized or proprietary protocols IP
  • For sercos interface advanced device model based on a three -layer communication model
  • Standardized I / O profile for the integration of Output Modules
  • Standardized C2C profile for direct cross-communication between the master and / or slave
  • Standardized safety protocol for transmission of safety-related data
  • Fault tolerance against cable breakage due to media redundancy
  • Hot -plugging of participants in sercos III network
  • Direct connection of, for example, Service notebook on sercos slaves
  • Cost-optimized and easy connectivity through renunciation of switches or hubs
  • Investment protection with maximum compatibility with the existing standard sercos interface
  • Direct communication between slave devices to one another

Typical performance data of sercos III

  • 8 drives with 8 bytes cyclically transmitting data in 31.25 microseconds
  • 70 drives with 12 bytes cyclically transmitting data in 250 microseconds
  • 150 drives with 32 bytes cyclically transmitting data in 1000 microseconds
  • 254 drives with 16 bytes cyclically transmitting data in 1000 microseconds