Siemens SINUMERIK 840D sl Operating Manual page 78

Machine the workpiece
3.2 Program running-in
Move by single block
In "Program control" you may select from among several types of block processing:
SB mode
SB1 Single block,
coarse
SB2 Data block
SB3 Single block,
fine
Requirement
A program must be selected for execution in "AUTO" or "MDA" mode.
Procedure
See also
Selecting a program (Page 77)
78
Scope
The machining stops after every machine block (except for cycles)
The machining stops after every block, i.e. also for data blocks (except for
cycles)
The machining stops after every machine block (also in cycles)
1. Press the "Prog. ctrl." softkey and select the desired variant in the
"SBL" field.
2. Press the "SINGLE BLOCK" key.
3. Press the "CYCLE START" key.
Depending on the execution variant, the first block will be executed.
Then the machining stops.
In the channel status line, the text "Stop: Block in single block ended"
appears.
4. Press the "CYCLE START" key.
Depending on the mode, the program will continue executing until the
next stop.
5. Press the "SINGLE BLOCK" key again, if the machining is not
supposed to run block-by-block.
The key is deselected again.
If you now press the "CYCLE START" key again, the program is
executed to the end without interruption.
Operating Manual, 01/2008, 6FC5398-6AP10-2BA0
HMI sl Universal