SLAAEM2 October   2024 AM2434

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Real-Time Communication in Factories
    2. 1.2 Industrial Protocols
    3. 1.3 Serial and Ethernet-Based Communication Protocols
  5. 2Industrial Protocols
    1. 2.1 Ethernet-Based Communication Protocols
    2. 2.2 Network Topologies
    3. 2.3 OSI Layer Model
    4. 2.4 Industrial Ethernet System Block diagram
      1. 2.4.1 Two-Port Device
      2. 2.4.2 One-Port Controller
    5. 2.5 Ethernet Physical Layer (PHY)
    6. 2.6 Media Access Controller (MAC)
      1. 2.6.1 Device MAC
      2. 2.6.2 Controller MAC
    7. 2.7 Industrial Protocol Stacks
    8. 2.8 Industrial Communication Software Development Kit (SDK)
    9. 2.9 EtherCAT Device Example Using the AM243x Processor
  6. 3Conclusion

2.4.2 One-Port Controller

Figure 2-5 shows the system components for a controller, which for example can be a PLC or motion controller. The controller typically runs some PLC application like CoDeSys. The controller has one industrial Ethernet Port that connects to the field devices like sensors, actuators or motors. There is also a second Ethernet port that connects the controller to the Control and Factory Level (see Figure 1-1).

One-Port Ethernet Controller Figure 2-5 One-Port Ethernet Controller

The Ethernet port to the field device can use a specific MAC implemention, but some protocols like EtherCAT controller only requires a standard MAC with time triggered send function.