Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 183)

Program Editing
Chapter 16
16-6
Online Data Change
Certain data of a word or block instruction, excluding Mathematics and Put
instructions, can be changed while the processor is in the
run/program mode.
Keystrokes: You can change data while the processor is in the
run/program mode by performing the following steps.
1. Position the cursor on the appropriate instruction.
2. Press [SEARCH] 51.
The key sequence displays the message ON-LINE DATA CHANGE,
ENTER DIGITS FOR: <Required information> near the bottom of the
screen. The new digits are displayed in a command buffer as they are
entered. After the new data is displayed:
3. Press [INSERT] to enter the data into memory.
4. You can terminate this function by pressing
[CANCEL COMMAND].
ATTENTION: When the address of an instruction whose data
is to be changed duplicates the address of other instructions in
the user program, this could cause unwanted machine motion.
This could result in damage to the equipment and/or injury to
personnel. The consequences of the change of each instruction
should be thoroughly explored.
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.
Searching
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 16.B for a summary of search functions.