Category archives: A-B PLC Migrations, Support

Allen-Bradley PLC upgrades, conversions and programming software for obsolete products.

Podcast: A-B PLC Migrations

Last update on Sept. 21, 2023.

We're the guest on the Automation Blog's Podcast October 4th, with the topic of A-B PLC Migrations.  Listen/watch anytime after 3:30 EST at

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Can't get MicroLogix 1400? Here's your in stock solution!

Last update on April 14, 2023.

Our MLXP3xx series combines a Micro or NeoPAC SoftPLC with an Xpress I/O block to create the best MicroLogix alternatives:

  • Convert existing ladder logic & documentation files. Our conversion utility generates a better result than Rockwell's Micro800 or CompactLogix conversions!
  • Physical size similar to the 1766-L32xWxx controllers - with options to add more I/O if needed.
  • Data table addressing compatible with existing HMI applications
  • Supports peer-to-peer messaging to other Rockwell products
  • and more!
MLX Series NeoPAC

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In Stock: A-B RIO/DH Gateways

Last update on March 30, 2023.

We provide gateways to provide communication between devices on Allen-Bradley Remote I/O (RIO) or Data Highway Plus (DH+) networks and devices on other networks such as Ethernet/IP, ModbusTCP, DF1, Modbus serial and others, and both models are in stock:  our Smart and NeoPAC SoftPLC Gateways.

ProSoft Discontinued RIO/DH+ Gateway

ProSoft Technology recently discontinued their AN-X2-AB-DHRIO product, which was the only other supported gateway on the market.  SoftPLC Gateways provide more functionality than the ProSoft model (see the "Compare" tab at and are value priced options for customers needing "blue-hose" communications for partial system upgrades.

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Podcast - Automation Interface Exchange

Last update on April 15, 2022.

We recently participated in an Automation Interface Exchange podcast with one of our Distributors.  A preview is below.

You can listen to the entire Podcast here:

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Smart SoftPLC & Gateway -v4 Coming Soon!

Last update on July 22, 2021.

Version 4 of the Smart SoftPLC/Smart Gateway hardware will be available in stock by the end of 2020.  The new products will include the same features of the existing product, plus many enhancements including:

  • Faster 64bit, quad-core CPU with 512MB RAM and 8GB on-board flash memory
  • 5 GB Ethernet ports, 4 on a switch with multiple MAC ID's
  • (2) USB 2.0 host ports
  • (3) configurable communication ports - choose any mix of A-B "bluehose" (Data Highway Plus or Remote I/O), RS-485, or others
  • embedded WiFi/Bluetooth, option for embedded cell modem

Product literature and web site updates ...

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New Video - Control System Migrations

Last update on May 27, 2020.

New Video - Control System Migrations

We've added a new video to our library.  This one discusses how SoftPLC Gateways can help A-B PLC users use phased migrations to upgrade their system vs complete retrofits.  Phased migrations reduce cost, downtime, and risk among other benefits. or

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SoftPLC NeoPAC now available!

Last update on June 26, 2020.

SoftPLC NeoPAC now available!

A new family of SoftPLC controllers and gateways is now available - the NeoPAC.

Packed with the features of our other SoftPLC's, the NeoPAC provides a powerful platform for:

  • Machine control - Great for OEM's!
  • Protocol Converter - serial to ethernet and/or to Allen-Bradley "blue hose" Remote I/O or Data Highway Plus
  • Cellular RTU - Combined with TagWell, you can monitor and control remotely located systems at very low cost
  • Data Logger
  • and more!

The NeoPAC is the lowest cost option for Allen-Bradley PLC migrations and RIO/DH+ gateways on the market.  It also can be used with serial/ethernet ...

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Enhanced Ethernet/IP Driver for SoftPLC v4.6

Last update on Nov. 5, 2018.

Now Available for all SoftPLC controllers version 4.6 and later is an enhanced Ethernet/IPTM driver.  SoftPLC can act as an Ethernet/IP generic device (adapter), or as a scanner (master).  A SoftPLC can also be used to simulate a Logix PLC for simulation/testing/training purposes.  Features of the Ethernet/IP driver include:

  • Five millisecond timing granularity
  • I/O scanner: up to 128 total originating i/o connections to as many target slaves as needed.
    • each i/o connection may have its own forward open timeout, RPI timeout multiplier, connection type, connection trigger type,
    • each i/o ...

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PLC-2 Programming Software

Last update on Sept. 5, 2015.

PLC-2 Programming Software

We've re-packaged TOPDOC for PLC-2 so it can now run on most modern PC's, including Windows7/8 systems.  Connection to the PLC-2 front port from a USB port is supported via an included USB-serial converter that operates with our Attached Mode Cable.

Use TOPDOC PLC-2 to support old systems until you're ready to migrate or upgrade.  We make it easy to upgrade - purchase TOPDOC PLC-2 and you receive a FREE Smart SoftPLC and TOPDOC NexGen.  Click here for details on this offer.

Existing TOPDOC PLC-2 customers can receive the repackaged software and USB-serial converter with the purchase ...

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Upgrade A-B PanelView, Drives & More

Last update on Sept. 5, 2015.

July 2012 Newsletter Feature Article:

Attention PLC-5, SLC-500, PLC-2 and other A-B PLC/PAC Users of Remote I/O “blue hose":

SoftPLC provides easy, low cost upgarde solutions to replace drives, PanelViews & other A-B RIO devices - with no PLC changes required.

Then, over time, you can use the same Gateway to migrate the PLC, I/O, and more to a modern solution.

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