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Introduction to Sercos interface
Advantages
Applications Types
Sercos III
Introduction
General Architecture
Features
Sercos III Profiles
Performance
Blended Infrastructure
Additional Resources
Sercos I and II
Sercos Standardization
  Introduction to Sercos III
  Summary of Sercos III Advantages
Key Advantage: Communications Efficiency
  Key Advantage: Multi-Axis Distributed Control
  Key Advantage: Cross Communications Capabilities
  Key Advantage: Enhanced Reliability
Key Advantage: Investment Protection


Key Advantage: Communications Efficiency


Sercos III provides a very simple and efficient architecture, merging proven hard real-time motion control messaging mechanisms with the Ethernet physical layer and protocol. A collision-free real-time channel with improved protocol efficiency transmits the motion control messages defined by Sercos. Independent of this real-time channel, a parallel Unified Communication Channel can carry all other Ethernet messages and IP-based protocols such as EtherNet/IP, TCP/IP and UDP/IP. This approach means the Sercos III network remains open to any other Ethernet protocol during a portion of each cycle. Certain alternative Industrial Ethernet architectures "take over" the bus to obtain maximum possible speed, which has the effect of preventing other protocols from sharing the network, or tunneling their telegrams within the Industrial Ethernet telegram which usually fragments the message. Tunneling also prevents other protocols from using the network if the real-time system is not operating, blocking communication for troubleshooting and information retrieval.

Sercos III communication is based on standardized parameter sets to control device functions, i.e., torque control, velocity control, position control, etc. When the manufacturing line or machine’s network is initialized, the parameters that make up the real-time data set on the device channel are defined in the configuration. This tight, hardware-dependant synchronization provides fundamental efficiencies in processing motion sequences across the network, making machines more efficient to design, build and operate.  Next >>