Allen-Bradley Server Ethernet

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Product Overview

The Allen-Bradley Server Ethernet device driver works in conjunction with KEPServerEX to provide data exchange between OPC/DDE clients and Allen-Bradley PLC-2 compliant PLCs via Ethernet. The driver allows an OPC client application to appear as 1 to 256 Allen-Bradley devices on the network. The server-client mode allows the server to receive data by exception from an Allen-Bradley sesrver. As with any client device, the Allen-Bradley Server driver only transfers data when being read or written by a server KEPServerEX automatically optimizes data acquisition based on client demand. Data integrity is ensured with our extensive error handling.



  • Acts as a single simulated Allen-Bradley PLC-2
  • Up to 256 devices may connect to the simulated PLC-2 at any time
  • Sockets used by incoming connections are aged according to activity level
  • All major memory and data types supported


  • Allen-Bradley Ethernet

Supported Devices

  • Allen-Bradley PLCs programmed to send PLC-2 type commands.

Available Languages

  • English
  • German
  • Japanese
  • Simplified Chinese

Application Support

  • DDE Format CF_Text and AdvancedDDE
  • NIO Interface for iFIX
  • OPC .NET Service (OPC .NET) Version 1.00
  • OPC Alarms and Events (OPC AE) Version 1.10
  • OPC Data Access (OPC DA) Versions 1.0a, 2.0, 2.05a, and 3.0
  • OPC Unified Architecture (OPC UA) Clients
  • SuiteLink and FastDDE for Wonderware

Release Notes



  • Removed non-inclusive terms out of respect for users of our software.
  • Renamed this driver (from Allen-Bradley Slave Ethernet/ Allen-Bradley Unsolicited Ethernet) in compliance with updated terminology.



  • Added Chinese language support.



  • Enhanced the driver to support a message length of 4096 bytes per request.
  • Added German language support.
  • Added Japanese language support.



  • Extended address range support to octal 77777.



  • Logix LINT arrays no longer allow a data type of Date array.
  • Fixed an issue with the reading of and writing to Logix LINT data.
  • Fixed an issue with the reading of String type values that are less than 32 characters.
  • Fixed an issue with the reading of and writing to the following array types: Char, Byte, Short, Word, Long, DWord, Float, and Double.


  • The driver will now check for License Activation upon receiving unsolicited communications.


  • Fixed issue where word order was being swapped on 32 Bit data types. Added a device prop to disable word swapping: "first word low".

Supported Device Details

Devices need not be PLC-2s. Consult your hardware programming manual.