I own a machine equipped with a CompactLogix 32e processor that experiences program loss when powered off briefly. I was under the impression that the processor should retain the program in memory for up to a week even without a battery. While waiting for a replacement battery to arrive, I'm eager to learn if there are any troubleshooting steps I can take with the processor. Your insights would be greatly appreciated. - JT
The newer CompactLogix and ControlLogix systems are very similar to the older ControlLogix models but lack a capacitor or nonvolatile Flash memory to retain the program when the battery is removed. Unlike the SLC-500 controllers, which could hold memory for weeks or even months with their capacitor, the CompactLogix and ControlLogix now save their memory to an onboard Flash device upon power-down. In summary, without a functioning battery, models like the 1769-L32E or -L35E will lose their program immediately upon power loss. For a more in-depth explanation, refer to the RA Knowledgebase.
Thank you Ken. JT
Are you experiencing a similar problem with the 5069-L4200ERMW PLC? Is this a common issue that requires UPS and battery backup solutions?
Facing the same issue with the 5069-L4200ERMW plc? It may seem strange, but it is crucial to equip your system with an uninterruptible power supply (UPS) and battery. According to publication 5069-UM002C-EN-P, the CompactLogix 5480 controllers differ from other Logix 5000 controllers as they do not have an internal ESM. To ensure the safety of your project's state in case of a power outage, it is necessary to connect an external UPS to the controller. Don't risk losing your data - invest in a UPS today!
An effective solution is utilizing either an SD card or CF card to boot up the system or recover data from a corrupted memory. This method can help improve system performance and prevent data loss in case of memory corruption.
Hey there JT, it sounds like you're dealing with a bit of a tricky situation. While it's true that the CompactLogix 32e processor can generally hold onto program data for about a week without the battery, there can be varying factors that may potentially affect this capability. Things like the age of the system, condition of memory chip, or any recent power surges can impact this retention. As a precautionary measure while you wait for the replacement battery, I'd suggest consistently saving a backup of your programming data, so you can easily reinput it if the memory wipes again. Also, a factory reset might help, but remember to backup before you do that!
Hey JT, while it's true that the CompactLogix 32e typically holds on to memory for a short while after power loss, other factors could be causing your program loss. Apart from the obvious low battery, the unit could be experiencing a sudden power surge or drop causing it to reset or it could be an issue with the firmware. You may want to check these parameters to make sure the problem isn't originating from another source. Also, always remember to backup your programs frequently to avoid loss. Looking forward to hearing if you get it resolved!
Hi JT, it sounds frustrating to deal with that program loss! Although the CompactLogix 32e should typically retain the program without a battery, it's possible that some settings or volatile memory are causing the issue. While you wait for the new battery, I’d recommend checking if the firmware is up-to-date, as sometimes programming or bugs can lead to unexpected behavior. Also, look into the configuration settings for memory retention and ensure there isn’t a power surge or drop affecting the system during those brief outages. Have you thought about writing down your program or backing it up to your PC if you haven't done so already? It might save some headaches!
✅ Work Order Management
✅ Asset Tracking
✅ Preventive Maintenance
✅ Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Answer: 1. Why is my CompactLogix 32e processor experiencing program loss when powered off briefly? - The program loss could be due to a depleted or malfunctioning battery that is not able to retain the program in memory when the power is turned off.
Answer: - The processor should typically retain the program in memory for up to a week even without a battery, but this can vary based on specific circumstances.
Answer: - You can try checking and replacing the battery, ensuring proper power supply connections, updating firmware, and verifying memory retention settings in the processor configuration.
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.