How to Connect EtherNet/IP to Cloud SCADA
EtherNet/IP is Rockwell/Allen-Bradley's native protocol, used by ControlLogix and CompactLogix PLCs across oil and gas. This guide explains how to read EtherNet/IP tags into a cloud SCADA platform for monitoring - without changing your control logic.
Short version: Merobix reads EtherNet/IP, so Allen-Bradley ControlLogix and CompactLogix PLC tags can be monitored in a cloud dashboard. It reads the tags without modifying the PLC program, and pairs EtherNet/IP with other drivers so a mixed fleet is read into one system.
EtherNet/IP and Allen-Bradley
EtherNet/IP (built on the Common Industrial Protocol, CIP) is the native network for Rockwell Automation controllers. Reading a ControlLogix or CompactLogix over EtherNet/IP gives you the same tags the PLC exposes, which is why it is the direct path to monitor Allen-Bradley equipment. Merobix reads EtherNet/IP among its broad protocol-driver coverage.
Monitoring Without Touching Control
A monitoring platform only reads - it does not change the PLC logic. Merobix polls the EtherNet/IP device for the tags you select and presents them in the cloud, so your control program keeps running exactly as before. On mixed fleets, EtherNet/IP sits alongside Modbus, S7, and DNP3 in the same platform, so Allen-Bradley and non-Rockwell devices land in one dashboard.
How to Connect EtherNet/IP Devices to Merobix
- Confirm the protocol and connection. Identify that your device speaks EtherNet/IP and how it is reached - a direct IP address, a serial connection, or through a cellular gateway at the site.
- Establish connectivity to the cloud. For remote sites, a cellular edge gateway reads the local device and connects outbound to the cloud - no fixed IP, no inbound firewall rule, no VPN. On networked sites, a direct connection works.
- Map the tags you care about. Select the registers, points, or nodes you want to monitor - pressures, levels, flows, states, alarms - and map them to named tags with engineering units. Merobix configures this for you as part of onboarding.
- Set polling or report-by-exception. Choose how data is collected - scheduled polling for reliable links, or report-by-exception to conserve cellular data and battery on remote sites.
- Verify data and set alarms. Confirm live values match the field, then set alarm thresholds. SMS and email alarms, typically delivered within a minute, are included - so the data is not just visible, it reaches someone when it matters.
Frequently Asked Questions
Can Merobix read Allen-Bradley PLCs over EtherNet/IP?
Yes. Merobix reads EtherNet/IP natively, so ControlLogix and CompactLogix tags can be monitored in a cloud dashboard - without modifying the PLC control program.
Does reading EtherNet/IP change my control logic?
No. Merobix only reads the tags you select; it does not write to or alter the PLC program. The controller keeps running its logic exactly as before.
Can I mix Allen-Bradley with other PLC brands?
Yes. Merobix reads EtherNet/IP alongside Siemens S7, Modbus, DNP3, and more, so a mixed fleet of controllers is read into a single cloud platform.
Sources and verification
This page references the standards, specifications, and official documentation published by the organizations below. Editions, product capabilities, and documentation change over time - confirm current requirements and specifications directly with the source.
- Rockwell Automation Literature Library (Allen-Bradley, Studio 5000) - Rockwell Automation
- Siemens SIMATIC and TIA Portal documentation - Siemens
- Modbus Application Protocol Specification - Modbus Organization
- Overview of DNP3 (IEEE Std 1815) - DNP Users Group
Merobix is not affiliated with, endorsed by, or sponsored by these organizations; their names are used only to identify the standards and products discussed.
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