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Physical View
Figure 2-6:
Example of Automation System
Key of Communication Types
Color
Method of communication
Blue
Ethernet
Ethernet is a large, diverse family of frame-based computer networking technologies that operate at many speeds for local area networks (LANs)
Green
EtherCAT
***EtherCAT is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT was to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs
Red
Modbus
ModBus is a serial communications protocol and is now the most commonly available means of connecting industrial electronic devices. ModBus is often used to connect a supervisory computer with a remote terminal unit in supervisory control and data acquisition (SCADA) systems. Versions of the ModBus protocol exist for serial port and Ethernet (it is widely used with TCP/IP over Ethernet)
Orange
Motor cable
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