Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 327)

After You’ve Entered Your Program
Chapter 18
18–6
Setting the Start-Up Protection Bit
This selection allows you to check for, and attempt to recover from, major
errors before starting the first scan of your program.
When this bit is set to NO , the controller will fault if a major error occurs
while in RRUN, RCSN, or RSSN mode.
When this bit is set to YES and power is cycled when the controller starts in
RRUN mode, the controller executes the user-fault routine prior to the
execution of the first program scan. You can then clear the Major Error
Halted bit (S1/13) to resume operation in the RRUN mode.
If user-fault routine does not reset bit S1/13, the fault mode results.
Therefore, program the user-fault routine logic accordingly. When executing
the startup protection fault routine, the Major Error Fault (S6) will contain
the value 0016H.
To change the bit setting:
1. Put the controller in RPRG mode (if it is not already in that mode).
2. Access the program configuration menu.
3. Arrow down to the option START PROTECT and select it.
ENT
4 times
S T A R T P R O T E C T
Y E S N O
4. Select the option YES and return to the home screen.
ENT ESC ESC
5. You must accept your program edits for this change to take affect. For
information on accepting edits, see page 18–21.