How Does Ethernet I/O Simplify Communication Between One PLC and Multiple Remote Locations? – 8400822

This document illustrates using Acromag’s BusWorks® XT Ethernet I/O modules to split one signal from a central control room PLC; and control multiple remote locations using Ethernet protocol.

Defining the Problem:

A customer has multiple remote locations linked over an Ethernet network, each requiring discrete outputs. They all need to be sent the same communication signal at the same time.

System Requirements:

All remote sites need to be controlled simultaneously from one central control room via Ethernet protocol

How Ethernet I/O Simplifies Communication Between One PLC and Multiple Remote Locations

Implementing the Solution:

  1. Set up the Ethernet comunication between master PLC device and the BusWorks XT discrete I/O modules (XT1111)
  2. Connect the field instruments and verify input status using the software test & polling feature
  3. Program the BAS with the remote I/O network parameters and Modbus registers.

Featured Products:

  • 16-Channel Discrete I/O, Modbus/TCP XT1111-000
  • 16-Channel Discrete I/O, with Counter/Timers 989EN-4016
  • Software Interface Package XT-SIP

Why Acromag:

Our BusWorks XT Modbus/TCP remote I/O modules include a peer-to-peer feature known as i2o. This is where two or more slaves can talk to each other without requiring a master. With i2o communication, one signal from the PLC is split by the XT1111 modules, then sent to multiple locations. The XT1111 automatically re-transmits the discrete level to each 989EN module’s IP address; thus reproducing the status of the original PLC input.


Learn more: What is Ethernet/IP?