Siemens SINUMERIK 840D sl Operating Manual page 267

You can also set markers and repeats after creating the program, but not within linked
program blocks.
Note
You can use one and the same marker as end marker for preceding program blocks and as
start marker for following program blocks.
Procedure
Milling
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
1. Position the cursor at the program block, behind which a program block
that will be repeated should follow.
2. Press the "Various" softkey.
3. Press the ">>" and "Repeat progr." softkeys.
3. Press the "Set marker" and "Accept" softkeys.
A start marker is inserted behind the actual block.
4. Enter the program blocks that you want to repeat later.
5. Press the "Set marker" and "Accept" softkeys again.
An end marker is inserted after the actual block.
6. Continue programming up to the point where you want to repeat the
program blocks.
7. Press the "Various" and "Repeat progr." softkeys.
8. Enter the names of the start and end markers and the number of times
the blocks are to be repeated.
9. Press the "Accept" softkey.
The marked program blocks are repeated.
Creating a ShopMill program
7.10 Repeating program blocks
267