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

System Status File 559ATTENTION!If you clear the Major Error Halted bit (S:1/13) when the controller modeswitch is in the RUN position, the controller immediately enters the RUNmode.Future Access (OEM Lock)Address Data Format Range Type User Program AccessS:1/14 binary 0 or 1 status read onlyWhen this bit is set (1), it indicates that the programming device musthave an exact copy of the controller program.SeeAllow Future Access Setting (OEM Lock) on page 52 for moreinformation.First Scan BitAddress Data Format Range Type User Program AccessS:1/15 binary 0 or 1 status read/writeWhen the controller sets (1) this bit, it indicates that the first scan of theuser program is in progress (following entry into an executing mode). Thecontroller clears this bit after the first scan..NOTEThe First Scan bit (S:1/15) is set during execution of the start-up protectionfault routine. Refer to S:1/9 for more information.STI ModeSTI PendingAddress (1) Data Format Range Type User Program AccessS:2/0 binary 0 or 1 status read only(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/UIP. SeeUsing the Selectable TimedInterrupt (STI) Function File on page 318 for more information.Publication 1766-RM001A-EN-P - October 2008