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Rslogix 500 81000 Cpr9 W Master Disk [upd] May 2026

RSLogix 500 version 8.10.00 (part of the Coordinated Product Release 9

or CPR 9) was a milestone release from Rockwell Automation, notable for being the last version to support the legacy EVRSI master disk activation method Activation & Legacy Support EVRSI Master Disk

: Version 8.10 is compatible with the legacy EVRSI (Master Disk) system, which typically uses a 3.5-inch floppy disk to transfer a license file ( ) to a computer's hard drive. FactoryTalk Transition

: While it supports legacy disks, this version was designed to transition users toward the FactoryTalk Activation Replacement Policy

: As of late 2011, Rockwell ceased replacing or providing technical support for the physical EVRSI master disks. Users with lost or damaged disks are now required to migrate to FactoryTalk Activation Rockwell Automation Version 8.10 Key Features Hardware Support : This release introduced support for the MicroLogix 1400

Series A controllers and new firmware (FRN 11) for modular SLC controllers. OS Compatibility : It was the first version officially supported for use on Windows Vista

(Business and Home Basic 32-bit), as well as Windows XP and Server 2003. Enhanced Instruction Set : Added mathematical and trigonometric instructions such as for specific MicroLogix models. Communication : Enhanced support for DNP3 Slave Modbus RTU Master configurations on MicroLogix platforms. PLCTalk.net Common Maintenance Procedures master disk and rslogix 500 | PLCtalk - Interactive Q & A

Assuming a legally-obtained, licensed copy of the software is where you got the master disk, the master disk contains "activation" PLCTalk.net RSLogix 500 Replacement Master Disk Activation Guide rslogix 500 81000 cpr9 w master disk

The phrase RSLogix 500 8.10.00 CPR9 with Master Disk refers to a specific, legacy configuration of Rockwell Automation’s ladder logic programming software. While modern automation has shifted toward Studio 5000 and the Logix 5000 family, RSLogix 500 remains the backbone for maintaining SLC 500 and MicroLogix controllers. Understanding the Technical Terms

To navigate this specific version, it helps to break down what these identifiers actually mean:

Version 8.10.00: This version was a pivotal update that improved compatibility with Windows XP and Windows 7. It allows for the configuration of modern I/O modules and provides the instruction set necessary for complex math and data handling.

CPR9 (Coordinated Product Release 9): This is Rockwell’s way of ensuring that different software packages (like RSLogix, RSLinx Classic, and FactoryTalk View) work together on the same operating system version without conflicts.

Master Disk: In the "classic" era of industrial software, the Master Disk was a physical floppy disk or a digital "key" file used for software activation. It preceded the modern FactoryTalk Activation Manager system. The Role of the Master Disk Today

For many engineers working on older factory floors, the "Master Disk" represents the EVMOVE or Move activation method. Modern computers no longer have floppy drives, which creates a hurdle for legacy systems.

If you are trying to activate RSLogix 500 v8.10 today, you generally have two paths: RSLogix 500 version 8

Legacy Transfer: Using a USB floppy drive to transfer the "Master" key to the hard drive via the EVMOVE.EXE utility.

Activation Migration: Converting the old master disk serial number into a modern Product Key and Serial Number to be used with FactoryTalk Activation Manager. Compatibility and Virtualization

Because RSLogix 500 v8.10.00 was designed during the Windows XP/7 era, running it on Windows 10 or 11 can be tricky. Most professionals use Virtual Machines (VMs) to host a stable environment for these legacy tools. This prevents the "Master Disk" activation from being corrupted by modern OS updates. Why Stick with 8.10.00?

While higher versions exist (up to v12+), v8.10.00 is often the "goldilocks" version for older plants. It is stable, supports almost every MicroLogix and SLC processor ever made, and doesn't require the heavy system resources of the newest releases.

If you're troubleshooting a faulted PLC or performing a program backup, having this specific version—and the means to activate it—is essential for avoiding downtime.

Based on the keywords in your request, you are likely referring to a legacy Allen-Bradley/Rockwell Automation software distribution, specifically RSLogix 500 (often associated with catalog number 9324-RLD or similar, where "81000" might refer to a specific legacy part or serial batch) using a Master Disk for copy protection.

During the era of RSLogix 500 versions that required Master Disks (typically versions through v5/v6), the "Master Disk" was a physical 3.5-inch floppy disk containing the software license. RSLogix 500 is the programming software for the SLC 500 and MicroLogix family of controllers. Why is this happening now

Below is a formal white paper documenting the installation, licensing, and historical context of this legacy software system.

Why is this happening now?

This issue usually surfaces in three scenarios:

  1. Hardware Upgrades: You moved the hard drive or cloned the OS to a new machine, changing the hardware signature.
  2. Lost Media: You have the installed software, but the original installation disks (containing the Master Disk file) are long gone.
  3. EVMove Failure: You are using the EVMove utility to move a license, but the software is looking for legacy CPR9 activation data that isn't present.

Compatibility Sweet Spot

1. Stick with CPR9

Best for: Air-gapped machines, SLC 5/03 processors, no new features needed. Risk: Hard drive failure loses the key.

Troubleshooting Common CPR9 Issues

What is "CPR9"?

CPR9 refers to a specific revision of Rockwell Automation’s "Common Procedure Release." In the late 90s and early 2000s, Rockwell software protection was heavily reliant on physical media. The "Master Disk" system was a form of copy protection where the software required the original floppy disk to be inserted into the A: drive to verify the license during installation or sometimes during major updates.

The 81000 error is essentially the software screaming, "I cannot find the hardware key or disk I was installed with."

Overview

RSLogix 500 is the programming software for Allen‑Bradley’s SLC 500 and MicroLogix families of PLCs.
The part number 81000 refers to a specific retail / license kit.
CPR9 (Critical Product Release 9) is a legacy version from the mid‑2000s (approx. 2006–2008).
The Master Disk usually contains the installer and sometimes the license activation (e.g., a master diskette or CD for floppy‑based licensing).

Full text as it might appear on the box or disk label

RSLogix 500 English Version CPR 9 Catalog No. 81000 Includes Master Disk Set Rockwell Automation

Who Should Buy This Today?