Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 380)

Program Editing
Chapter 24
24-7
Important: When the memory write protect is activated, online data
change is not be allowed for addresses above 177. If you attempt to
change data above address 177, the industrial terminal displays the error
message MEMORY PROTECT ENABLED.
You can use the 1770-T3 terminal to search your program for:
specific instruction and specific word addresses
first condition or output instruction in a rung
single rung display
incomplete rung
first and last rung and user boundaries
remote mode select
See Table 24.B for a summary of search functions.
Search Functions