Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 393)

Programming Technique
Chapter 25
25-3
You may get into a situation that transfers the contents of the EEPROM
into CMOS RAM memory. The data values (timers, counters and storage
bits/words) that were present when the EEPROM was burned will also be
transferred along with the ladder diagram.
You can use either one of two methods to inhibit operation:
MCR method - the processor is disabled for one scan before I/O update
(Figure 25.3).
Figure 25.3
Automatic Restart Using an MCR Instruction
027
01
MCR
MCR
U
027
OFF 01
USER PROGRAM
JMP method - the program is jumped over once before I/O update
(Figure 25.4).
Figure 25.4
Automatic Restart Using JMP Instruction
027
01
JMP
U
027
OFF 01
USER PROGRAM
06
06
LBL
Restart