Category archives: A-B PLC Migrations, Support

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

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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Enhanced ONE Communication Drivers

Last update on Sept. 5, 2015.

Smart SoftPLC now includes support for SLC-500 commands in the DF1 and Ethernet drivers.

This means HMI’s that support SLC-500, but not PLC-5, now have improved communications to the Smart SoftPLC. Added commands are:

Protected Typed Logical Read with 3-Address Fields
Protected Typed Logical Write with 3-Address Fields
Protected Typed Logical Masked-Write with 3-Address Fields
Protected Typed Logical Read with 2-Address Fields
Protected Typed Logical Write with 2-Address Fields

Contact support@softplc.com for firmware updates or more information.

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March 2012 Newsletter Published

Last update on Sept. 5, 2015.


  • SMS Read/Write Ladder Instructions
  • New Products - Low Cost, Rugged Cell Modems
  • Application Story - Flawless PLC-5 Migration

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A-B PLC Migration/Upgrade Video

Last update on Sept. 5, 2015.

This short video details how easy and low-risk upgrading older A-B PLC CPU’s can be, when the new controller is a SoftPLC programmable automation controller!

For more details, visit this page.

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January 2012 Newsletter Issued

Last update on Sept. 5, 2015.


  • Allen-Bradley PLC Migrations - Low Risk, Low Cost
  • TOPDOC NexGen Downloadable Demo

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