Communication Protocols
Industrial Ethernet Communication Standards
Key Protocols & Their Strengths
EtherCAT
- Ultra-fast real-time communication with cycle times ≤ 100 µs and jitter ≤ 1 µs. Ideal for high-speed automation, robotics, and precision control. Wikipediahms-networks.com
- Efficiency through “on-the-fly” data processing in slaves; supports up to 65,535 nodes per segment. Wikipedia
Profinet
- Widespread in Europe; supports three classes: RT (Real-Time, ~1–10 ms) and IRT (Isochronous Real-Time, < 1 ms, needs hardware support/TSN). WikipediaNext.gr
- Based on IEEE Ethernet; seamless integration with PLCs and field devices. Wikipedia
EtherNet/IP
- Built on CIP (Common Industrial Protocol), strong real-time support and integration ease. Common in North America, but also used globally. hms-networks.comTME
Modbus TCP
- Ultra-fast real-time communication with cycle times ≤ 100 µs and jitter ≤ 1 µs. Ideal for high-speed automation, robotics, and precision control. Wikipediahms-networks.com
Powerlink
- Real-time Ethernet with deterministic behavior, suitable for machine tools, CNC, robotics. Offers redundancy and CANopen compatibility. encoder.co.ukencoder.com
CC-Link IE / CC-Link IE TSN
- Industrial Ethernet standard popular in Asia, supports gigabit speeds and TSN for high-volume automation. Wikipedia
Sercos III
- Designed for hard real-time motion control in robotics and machining, standardized under IEC 61800 7. Wikipedia
IEC 61850
- Used in substations for protective device communication. Supports GOOSE, MMS, and SV over Ethernet delivering <4 ms responsiveness. Wikipedia
AS-Interface (ASi 3 & ASi 5)
- Low-cost I/O network using two-wire cabling (data + power). Widely used for sensors/actuators with support up to SIL 3 safety levels. Wikipedia
Application-Specific Communication Modules for Cirbrid
Here’s how different industrial standards map to real-world devices:
| Use Case / Device | Suitable Ethernet Protocols | Key Benefits |
|---|---|---|
| High-speed control (robotics) | EtherCAT, SERCOS III | Sub-millisecond sync & deterministic |
| Process automation & field I/O | PROFINET RT/IRT, Ethernet/IP | Flexible, real-time, scalable |
| Building/utility automation | Modbus TCP | Simple, open, cost-effective |
| Precision machine tools | POWERLINK, CC-Link IE TSN | Time-sensitive, redundant support |
| Electrical protection systems | IEC 61850 | Fast, reliable substation communications |
| Simple sensors/actuators | AS-Interface | Cost-effective, low-speed networks |
Designing Cirbrid-Style Solutions
Communication Modules Architecture
Communication Modules Architecture
- Embed EtherCAT or SERCOS III stack.
- Hardware-level sync and real-time I/O handling.
Industrial Ethernet Module (for field I/O)
- Support PROFINET RT/IRT and Ethernet/IP.
- Capable of VLAN, PTP or TSN depending on RT requirements.
Lightweight, Cost-Effective Module
- Implement Modbus TCP for legacy or simple monitoring devices.
Safety & Redundancy Module
- Incorporate POWERLINK or CC-Link IE TSN for critical automation.
Protection and Substation Module
- IEC 61850 support with GOOSE/MMS/SV for fast relay and protection tasks.
Simple I/O Adapter
- AS-Interface module providing data + power for low-cost sensors.
Integration Advantages
- Scalable & Modular: Mix-and-match modules depending on functionality and performance needs.
- Protocol Interoperability: Cross-hub or gateways can translate between PROFINET, EtherCAT, Modbus, IEC 61850, etc.
- Security & Robustness: Use TSN for timing, redundancy for uptime, support safety layers (IEC 61850, ASi safety).
- Future-Proof: Ready for single-pair Ethernet, expanding TSN, and evolving I/O profiles.
Summary of Applications
- Identify Application Segments: Define your service verticals—e.g., robotics, EV charging, utility distribution, building automation.
- Choose Core Protocols: For each segment, pick 1–2 standards that best meet real-time, cost, or safety needs.
- Design Modular Hardware: Ensure Ethernet PHYs and stacks support needed features (e.g., TSN, VLAN, IEC stacks).
- Develop or Source Stack Firmware: Consider hardware accelerators for EtherCAT, support for IEC 61850, etc.
- Validation & Testing: Bench-test real-time performance, interoperability, and failover in multi-protocol environments.
- Customer Deployment Kits: Offer plug-and-play modules plus gateway integration for mixed protocol environments.