Your exact and current firmware version. Whether this system uses enhanced redundancy modules.
Installation and prerequisites (practical notes)
Fixes critical bugs where standard analog outputs failed to hold their predefined safe-state values during a processor fault. rslogix 5000 firmware 20.12
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)
Revisions 20.04, 20.05, and 20.06 were released to fix this split. These versions can open and go online with projects from both 20.01 and 20.03. Technical Specifications & Requirements Your exact and current firmware version
: Upgrading both the programming software and the physical controller firmware to v20.12 resolves these erratic database mismatches. Version 20.12 acts as a stable, unified standard across engineering workstations to eliminate "Project File Is Newer/Older Than Software" errors. Installation and Deployment Best Practices
Any version 20.xx software on your PC can successfully communicate, upload, and download to a PLC running firmware 20.12. Critical Software Compatibility Guide It corrects issues where axes (both SERCOS and
| Issue | Description | Workaround | |---|---|---| | | The Security Tool fails to connect to controllers with v20 firmware, displaying a “communications timed out” error. Does not affect earlier firmware versions. | Use an alternative security management method or earlier tool version. | | Slow launch times after restart | First launch of RSLogix 5000 after a PC restart takes 1–3 minutes to become available. | Normal behavior; subsequent launches are faster. Check firewall settings if delays exceed 3 minutes. | | Online correlation failure with large edits | Accepting pending edits for more than 1000 rungs at once causes a correlation failure and takes RSLogix 5000 offline. | Accept pending rung edits before reaching the 1000‑rung limit. | | Tag Editor sluggish with large arrays | Expanding large array tags using “Expand All” can cause low virtual memory conditions and slow response. | Close other applications or expand array tags manually. | | Uninstall failure with low disk space | RSLogix 5000 may fail to uninstall if disk space is low, citing an error about locating internal binary resources. | Free up disk space before attempting uninstallation. | | Wall Clock Time beyond 2038 crash | Setting the Wall Clock Time beyond January 17, 2038 causes RSLogix 5000 to crash. | Avoid setting the clock beyond that date. |
Common issues and troubleshooting steps for RSLogix 5000 firmware 20.12 include: