Remote IO — LS Electric (XGB) Connection

Overview

System setup — SMX-RNS20 reading data directly from LS Electric panel via Modbus TCP

LS Electric XGB-series PLCs (XBC, XBM, XEC) support Modbus TCP as a standard Ethernet protocol. This guide covers the configuration needed to read PLC data registers using the SMX-RNS20 Remote IO feature.

PLC Configuration (XG5000)

• Open XG5000 and navigate to the CPU module’s Ethernet settings.
• Enable the Modbus TCP Server on the built-in Ethernet port. Default port: 502.
• Assign a static IP address to the PLC on the same subnet as the SMX-RNS20 LAN.
• Note the Modbus register addresses for your data. LS Electric uses the following mapping: %MW0 → Holding Register 0, %MX0 → Coil 0.

SMX-RNS20 Remote IO Configuration

1. Log in to the SMX-RNS20 web interface → Remote IO → Connections.
2. Click Add Connection and select Driver: Modbus TCP.
3. Enter the PLC IP address, port 502, and Unit ID 1.
4. Add the data points you need (FC03 for holding registers is most common for LS PLCs).
5. Save the configuration and verify live data in Remote IO → Monitor.

Screenshots

SX-Client — LS Electric panel appears in the connected Ethernet device list

XP Builder — enabling Modbus TCP server on LS Electric panel

XP Builder — Modbus TCP address mapping

Remote IO — Add new Modbus TCP driver

Remote IO — creating tags for LS register addresses (%MW0 → HR0)

Remote IO — tag address and type configuration

Remote IO — tag list

Remote IO — Driver status confirming connection to LS Electric panel

Remote IO — Tag status page showing live register values