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Industrial Communication

Industrial Ethernet Protocols Compared

PROFINET, EtherCAT, EtherNet/IP and Modbus TCP compared by speed, synchronization and typical use.

4 min readUpdated: 2026-07-05

Industrial Ethernet protocols use the same physical layer (Ethernet) but differ in real-time and synchronization capability.

PROFINET
PLC-field, broad ecosystem
EtherCAT
Lowest latency, motion
EtherNet/IP
CIP-based, common in the US
Modbus TCP
Simple, open, slower
Rough comparison
The choice depends on the existing PLC brand, required synchronization and field-device support. Gateways are used in mixed plants.

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