As the use of ETHERNET is becoming more and more prominent, especially in industrial settings, industrial protocols are becoming normalized terms when looking for products for systems such as automation and process control. Refer to the below table to decipher which protocol may be best for your operations to abide by.
EtherNet/IP is a very widely supported protocol that uses standard Ethernet hardware and both TCP/IP and UDP/IP for transferring data. It has limited real-time capabilities vs some other protocols, but it's able to run servo-motor controls as well as having broad applicability to discrete-control industrial automation systems.
Covers discrete/factory automation and process automation in addition to motion control. Encompasses two performance classes - PROFINET RT (real-time) or PROFINET IRT (hard real-time).
EtherCAT (based on the summation frame method) and the Open Software / Modified Ethernet methodology and is capable of very fast speed with its "processing on the fly" principle where EtherCAT messages are passed before processing at each node.
Ethernet Powerlink is a real-time protocol for standard ethernet, fully supporting TCP/IP. The protocol provides high performances and clear diagnostics and brings together Ethernet, CANopen and hard real-time capabilities.
CABLING TOPOLOGIES:
Tree Topology
X
X
May be applicable
X
Star Topology
X
X
May be applicable
X
Ring Topology
X
X
X
X
Daisy-chain Topology
X
X
X
X
INTERNATIONAL STANDARDS SUPPORT:
IEC 61158
Type 2
Type 10
Type 12
Type 13
IEC 61784-2
CPF 2
CPF3
CPF 12
CPF 13
GB National Chinese Standard
GB/Z 26157-2010
GB/Z 25105-2010
Not applicable
GB/T 27960-2011
CAPABILITIES AND PERFORMANCE:
Downward Protocol Capability
X
X
X
X
Cycle Time Performance
May be applicable
RT: May be applicable
IRT: X
X
X
Heavy Data Prioritization
X
X
May be applicable
X
Gigabit Readiness
X
RT: May be applicable
IRT: Not applicable
Not applicable
X
EMC Susceptibility
X
X
May be applicable
X
Hot Plugging Capability
X
X
May be applicable
X
AVAILABILITY:
Ring Redundancy
May be applicable
May be applicable
X
X
Master & Cable Redundancy
May be applicable
May be applicable
May be applicable
X
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