Rslogix 5000 Firmware 20.12 Official
Here is the part that trips up even experienced engineers: You cannot always flash straight to v20.12.
Rockwell identified a security vulnerability and a need for a more robust bootloader. Consequently, if you have a controller running older firmware (like v20.01 or earlier), you often cannot flash it directly to v20.12 using ControlFLASH.
Instead, you typically had to follow a two-step process:
This process caused headaches for many engineers trying to update controllers in the field. Missing this step often resulted in flashing errors, leaving engineers scratching their heads wondering why the "latest" firmware wouldn't take.
Q: Can I install RSLogix 5000 V20 and Studio 5000 V30 on the same PC? A: Yes, absolutely. Rockwell versions are side-by-side installable. However, install V20 first, then later versions.
Q: Is 20.12 compatible with FactoryTalk View ME/SE? A: Yes, but you must ensure your FactoryTalk Linx (or RSLinx Enterprise) version is at least 6.0. Older versions may fail to browse V20.12 controllers.
Q: My CompactLogix 5370 says it supports V20.11 but not V20.12. Is it safe? A: Yes. V20.12 is a minor revision increment. For the 5370 series, V20.11 was the "release" firmware, but V20.12 is fully backward compatible. Use ControlFlash to force the update. rslogix 5000 firmware 20.12
Q: How do I get firmware 20.12 if I don’t have a Rockwell support contract? A: You cannot legally. Rockwell firmware is protected by copyright and requires a valid TechConnect contract. Contact your local distributor for a one-time download or upgrade your support agreement.
When using Produced/Consumed tags over a backbone with 20.12 and a 1756-EN2TR bridge, you may experience a 1-second CPU spike on connection loss. Workaround: Set RPI to non-multiples of 2 ms (e.g., 5 ms instead of 4 ms).
If you want, I can:
RSLogix 5000 firmware is a critical maintenance release for the Logix 5000 controller platform, specifically designed to address significant security vulnerabilities and functional anomalies. Rockwell Automation Critical Version Numbering Note
A common point of confusion is the difference between how the version is displayed in software versus the Product Compatibility and Download Center (PCDC) Firmware v20.012 (as seen in PCDC) is the exact same as when viewed in the Controller Properties of RSLogix 5000. Rockwell Automation Key Features & Improvements Security Patches:
This version addresses a vulnerability that could allow attackers to cause a Denial of Service (DoS) Here is the part that trips up even
or potentially alter the controller's operating state via a buffer overflow. Motion Control Fixes:
It corrects issues where axes (both SERCOS and CIP Drive types) would not allow motor feedback or marker tests while in certain safety or inhibit states. Drive ADC Stability: Resolves an anomaly where controllers using Automatic Drive Configuration (ADC)
with PowerFlex 750 drives could become stuck when transitioning to "Run" mode. SD Card Reliability:
Corrects a "Major Fault" condition that could be triggered simply by the presence, absence, or insertion of a Secure Digital (SD) card Rockwell Automation Important Compatibility & Usage Warnings Software Pairing:
While v20.012 is a firmware revision, it was primarily released to be used with RSLogix 5000 v20.01 . However, using v20.00 software with v20.012 firmware strongly discouraged
, as it can lead to "unknown" major recoverable faults if an index-out-of-range error occurs. Safety AOI Changes: This process caused headaches for many engineers trying
Downloading a project to a controller with this firmware may change the signature for Safety Add-On Instructions (AOIs) , requiring them to be revalidated after the download. Restoring Compatibility:
For users managing multiple version 20 projects, Rockwell released v20.04 software to restore minor revision compatibility
, allowing a single workstation to easily access files originally created in v20.01 or v20.03. Rockwell Automation Upgrade Path Requirements
If you are maintaining tens or hundreds of controllers on v20.12, follow these enterprise-level strategies:
For engineers working with v20.00 or v20.11, upgrading to v20.12 was often mandatory due to several critical bug fixes:
