1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

564 System Status FileMemory Module BootAddress Data Format Range Type User Program AccessS:5/8 binary 0 or 1 status read/writeWhen this bit is set (1) by the controller, it indicates that a memorymodule program has been transferred due to S:1/10 (Load MemoryModule on Error or Default Program) or S:1/11 (Load Memory ModuleAlways) being set in an attached memory module user program. This bitis not cleared (0) by the controller.Your program can examine the state of this bit on the first scan (using bitS:1/15) on entry into an Executing mode to determine if the memorymodule user program has been transferred after a power-up occurred.This information is useful when you have an application that containsretentive data and a memory module has bit S:1/10 or bit S:1/11 set.Memory Module Password MismatchAddress Data Format Range Type User Program AccessS:5/9 binary 0 or 1 status read/writeAt power-up, if Load Always is set, and the controller and memorymodule passwords do not match, the Memory Module PasswordMismatch bit is set (1).SeePassword Protection on page 50 for more information.STI LostAddress (1) Data Format Range Type User Program AccessS:5/10 binary 0 or 1 status read/write(1) This bit can only be accessed via ladder logic. It cannot be accessed via communications (such as a Messageinstruction from another device).This address is duplicated at STI:0/UIL. SeeUsing the Selectable TimedInterrupt (STI) Function File on page 318 for more information.Processor Battery LowAddress Data Format Range Type User Program AccessS:5/11 binary 0 or 1 status read onlyThis bit is set (1) when the battery is low.Publication 1766-RM001A-EN-P - October 2008