4-7 www.mo xa .c o m 4 Introduction to Industrial Ethernet Gateways Industrial Ethernet Industrial Ethernet Gateways > Monitoring a Small-Scale Power Generation System Electric Control Panel Monitoring Modbus RTU/ASCII to Modbus TCP Industrial plants often have their own power generation systems to provide an uninterrupted power supply. To enable continuous monitoring, Modbus is commonly adopted as a communication protocol to transmit large volumes of Modbus RTU monitoring information from power RTUs, Intelligent Electronic Devices, and meters, via industrial gateways to the process control system running on a Modbus TCP network. Modbus RTU/ASCII to EtherNet/IP EtherNet/IP is a communication protocol developed by Rockwell Automation, and is widely used in many large-scale power systems for remote monitoring to ensure reliable performance and energy control. Although ControlLogix PLCs support Modbus modules for connecting a Modbus RTU to EtherNet/IP, it may be too expensive to modify the PLC code and a convenient rack slot may not be available. For this reason, gateways have become a popular way to achieve Modbus communication requirements. Data Center Power Monitoring Production Line Control Applications Modbus RTU/ACSII to Modbus TCP Data centers and server rooms use a significant amount of energy, with many industrial facilities spending nearly 25% of their total operating budget on this expense. Consumption is measured by power meters located throughout the facility, with many of the meters integrated with a Modbus RTU. Data from the meters is transmitted via an industrial gateway to a Modbus TCP network, and finally to a DCIM (data center infrastructure management) system. Modbus RTU/ASCII to PROFIBUS As labor costs increase year after year, manufacturers have transitioned to using automation systems to reduce labor costs, with PLCs used as one solution to accomplish this. Most devices still use Modbus RTU, which is the most common protocol. For this reason, industrial Ethernet gateways are the right choice for converting Modbus RTU to PROFIBUS, which can be controlled by PROFIBUS PLCs. SCADA Monitor MGate MB3170I Modbus RTU/ASCII-to- Modbus TCP Gateway MGate MB3180 Modbus RTU/ ASCII-to-Modbus TCP Gateway Station A Station B Modbus TCP Power Meter Power RTU Switch Switch Switch Intelligent ElectronicDevice Power Meter Power RTU Intelligent ElectronicDevice Modbus RTU Modbus RTU PLC Power Meter EtherNet/IP Modbus RTU MGate 5105-MB-EIP Modbus TCP/RTU/ASCII-to-EtherNet/IP Gateway Power Protector Inverter