What is Energy Efficient Ethernet (EEE)?

Energy Efficient Ethernet (EEE) reduces power consumption during periods of low network activity while maintaining network connectivity.

EEE, defined by the IEEE 802.3az standard, allows Ethernet devices to enter low-power states when traffic is idle. When network traffic increases, devices automatically return to full power, ensuring normal operation while saving energy during inactivity.

This technology helps reduce overall energy consumption, especially in environments with fluctuating network traffic, like data centers or offices.

Example Scenario – Using Energy Efficient Ethernet (EEE) with HMI and PLC:

In a manufacturing plant, a Maple Systems HMI and a Maple Systems PLC are connected to a network switch that supports Energy Efficient Ethernet (EEE). During typical operation, the HMI and PLC communicate frequently to exchange control data, process information, and trigger alarms. However, when the system enters a low-activity state (e.g., between production cycles or during maintenance), the network traffic drops significantly.

With EEE enabled on the switch and both devices, the HMI and PLC will automatically enter low-power states, reducing power consumption without interrupting their ability to reconnect when network activity resumes. When communication between the HMI and PLC picks up again, the devices will immediately transition back to full power, ensuring they remain responsive and ready to handle new commands.

Content created by Mike Day