Real-Time Ethernet Technology Comparison

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1 Real-Time Ethernet Technology Comparison SERCOS Seminar Atlanta September 16, 2009 Peter Lutz, Managing Director SERCOS International e.v.

2 Real-Time Ethernet Competition No. 2

3 Overview on Real-Time Ethernet Technologies (Selection) CC Link IE Drive CliQ EPA EtherCAT EtherNet/IP + CIP Sync Ethernet Powerlink IEEE 1588 / PTP JetSync Modbus RTPS Mechatrolink III PowerDNA Profinet RAPIEnet RTEX SafetyNET p SERCOS III SynqNet TCnet Varan Vnet/IP Source: No. 3

4 Overview on Real-Time Ethernet Technologies (Selection) CC Link IE Drive CliQ EPA EtherCAT EtherNet/IP + CIP Sync Ethernet Powerlink IEEE 1588 / PTP JetSync Modbus RTPS Mechatrolink III PowerDNA Profinet RAPIEnet RTEX SafetyNET p SERCOS III SynqNet TCnet Varan Vnet/IP Source: No. 4

5 Overview on Real-Time Ethernet Technologies (Selection) CC Link IE Drive CliQ EPA EtherCAT EtherNet/IP + CIP Sync Ethernet Powerlink IEEE 1588 / PTP JetSync Modbus RTPS Mechatrolink III PowerDNA Profinet RAPIEnet RTEX SafetyNET p SERCOS III SynqNet TCnet Varan Vnet/IP Source: No. 5

6 Overview on Real-Time Ethernet Technologies (Selection) CC Link IE Drive CliQ EPA EtherCAT EtherNet/IP + CIP Sync Ethernet Powerlink IEEE 1588 / PTP JetSync Modbus RTPS Mechatrolink III PowerDNA Profinet RAPIEnet RTEX SafetyNET p SERCOS III SynqNet TCnet Varan Vnet/IP Source: No. 6

7 Real-Time Ethernet Protocols: Efficiency / Performance a) SERCOS III: Collective telegrams (Real-time channel) b) EtherCAT: Tunnelled Ethernet frames Separate Ethernet frames (non-real-time channel) RT 1 RT 2 RT 3 ETH 1 ETH 2 ETH 1 RT 1 Collective telegrams Communication cycle RT 1 RT 2 RT 1 ETH 1 RT 3 Communication cycle t t c) Profinet, Ethernet/IP, Ethernet Powerlink: Separate Ethernet frames Padding RT 1 RT 2 RT 3 Separate Ethernet frames ETH ETH RT 1 Communication cycle t RT i : Real-time data of node i, ETH: Ethernet frame with non-real-time data No. 7

8 Example: Cross Communication with SERCOS III Master Slave 1 Slave 2 Slave (n) Direct cross communication in forward path (here between slave 1 and slave 2) CAT5 Direct cross communication in reverse path (here between slave 2 and slave 1) Real-time processing during passing through a node Signal transmission without interpretation : Ethernet transmitter (Sender), Physical Interface : Ethernet receiver (Receiver), Physical Interface No. 8

9 Example: Cross Communication with EtherCAT a) Direct cross communication in forward path (here between slave 1 and slave 2) b) CAT5 Master Slave 1 Slave 2 Slave (n) Indirect cross communication in reverse path (here between slave 2 and slave 1) Real-time processing during passing through a node Signal transmission without interpretation : Ethernet transmitter (Sender), Physical Interface : Ethernet receiver (Receiver), Physical Interface No. 9

10 Example: Redundancy Concept of EtherCAT Normal operation: Transmission of real-time data in line topology Fault case: Detection of redundancy case by redundancy manager (M) Fault case: Activation of reserve line after successful reconfiguration M Reserve line (inactive during normal operation M M Activated reserve line S1 S4 S1 S4 S1 S4 S2 S3 S2 S3 S2 S3 Link break during reconfiguration t No. 10

11 Example: Redundancy Concept of SERCOS III Normal operation: Fault case: Cyclic, redundant transmission of real-time data in primary and secondary ring Splitting up into two lines M M S1 S4 S1 S4 S2 S3 S2 S3 Recovery time: < 25 µs No reconfiguration required! t No. 11

12 Example: Interoperability with SERCOS III and EtherCAT Vendor A Control S-3 Profile Vendor B SERCOS III Drives SERCOS III S-3 Profile SERCOS III S-3 Profile SERCOS III Vendor C Vendor A Control S-3-A Vendor B Ethercat Drives Ethercat DS402-B Ethercat DS402-C Ethercat Vendor C No. 12

13 Comparison of selected Real-Time Ethernet Solutions SERCOS III EtherCAT PROFINET IRT Ethernet Powerlink EtherNet/IP + CIPsync & CIPmotion Performance o o Ethernet Conformity + o Installed Base o Variety of Suppliers & Products + ++ o o o Independence + o o o o No. 13

14 Evolution of Fieldbus and Drivebus Technologies DeviceNet Ethernet/IP+CIP Sync Profibus Profinet IRT Interbus Ethercat CANopen Powerlink SERCOS II SERCOS III No. 14

15 Summary SERCOS III combines the proven mechanisms of SERCOS interface (IEC 61491) with Ethernet (IEEE 802.3) uses the established and proven synchronization mechanisms and profiles of the existing SERCOS interface allows an easy migration from SERCOS II to SERCOS III is based on a cost-efficient and flexible standard hardware covers all actual and future requirements for motion control applications (C2C, Safety, I/O) develops from a specialized drive bus to an universal real-time Ethernet network No. 15

SERCOS III Universal Real-Time Communication for Automation

SERCOS III Universal Real-Time Communication for Automation MOF 2010 / Summit, Tokyo /Japan November 19,2010 Peter Lutz, Managing Director, SERCOS International e.v. SERCOS III : Next Evolution Step for