Niagara R2 Modbus RTU Integration with Eaton Series 2000 Xpert Power Meter

[Product_Support]

Issue

Difficulty integrating Eaton Series 2000 Xpert Power Meter with Niagara R2 using Modbus RTU due to unclear documentation on register map differences between IP and RTU protocols.

Product Line

TAC IA Series

Environment

• I/A Series UNC
• Eaton Series 2000 Xpert Power Meter

Cause

The Eaton documentation does not clearly differentiate between Modbus register maps for TCP/IP and RS-485 RTU, leading to confusion during integration.

Resolution

1. Locate RS-485 Map:
   The Modbus RTU RS-485 register map is found under Eaton IQ-250/260 meter documentation, not under Series 2000.

2. Access Embedded Utility:
   Use the embedded setup and monitoring software on the Eaton Power Meter.

   • Click the Help button to upload the Modbus map as an Excel spreadsheet.
   • Note: This map represents the TCP/IP Modbus register map, not RS-485.

3. Connection Details:

   • Access via a standard internet browser using Ethernet cable.
   • Default IP address: 192.168.1.1.

4. Register Calculation:
   Convert Eaton’s decimal register number to standard 5-digit Modbus register by adding 40000.

   • Example: Register #1000 → 40000 + 1000 = 41000 (Volts Phase A - Neutral).