Rockwell Automation 1772-L8_LW_LWP_LX_LXP,D17726.5.8 User Manual - Manual (Page 378)

Program Editing
Chapter 24
24-5
Removing a Rung
Removing a rung is the only way an output instruction can be removed.
You can remove any rung, except the last one containing the
END statement.
Remove a rung by performing the following steps.
1. Position the cursor anywhere on the rung you want to remove.
2. Press [Remove][Rung].
Only bits corresponding to Output Energize, Latch, or Unlatch instructions
are cleared to zero. All other word and bit addresses are not cleared when
a rung is removed.
Changing Data in a Word or Block Instruction
You can change the data of any word or block instruction, except
Mathematics and Put instructions, in the program mode without removing
and re-entering the instruction.
Change the data of any word or block instruction by performing the
following steps.
1. Position the cursor on the appropriate word instruction.
2. Press [Insert] <data>.
When the last digit of the data is entered, the function is terminated and the
data is entered into memory. Once you enter the first digit, you can use the
[
→
][
←
] keys. The function can also be terminated and entered into
memory before the last digit is entered if you press [Cancel Command].
Changing the Address of a Word or Block Instruction
You can change the address of a word or block instruction with data,
excluding Mathematics and Put instructions, without removing and
re-entering the instruction.