Allen-Bradley · MicroLogix 1400 Programmable Controllers
Status bit S:2/9 is set in the controller, indicating that the user program stored in the non-volatile RAM (NVRAM) or memory module does not match the user program currently loaded and executing in the controller. This is a nonrecoverable fault.
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Transfer the user program from the memory module to the controller using the programming software.
Change the controller to Run mode after the program transfer is complete.
Verify bit S:2/9 is correctly handled in the system logic if it's intentionally set.