Single Block; Parameterization - Siemens SINUMERIK 840D sl Function Manual

9.13

Single block

With the "single block" function, the user can execute a part program block-by-block.
Function versions
The "single block" function is available in three versions:
● SBL1 (= IPO single block)
When SBL1 is active, machining stops or pauses after each machine action block (IPO
block).
● SBL2 (= decode single block)
When SBL2 is active, machining always stops or pauses after each part program block. If
a part program block is processed in several IPO blocks, machining stops after every IPO
block. Thread cutting is an exception.
● SBL3 (= stop in cycle)
As with SBL2, however, there is a stop after every part program block in the cycle, too.
Selection and activation
SBL1, SBL2, or SBL3 are selected via the user interface (below the "program control" display).
This is activated via the channel-specific NC/PLC interface signal:
DB21, ... DBX0.4 (activate single block)
9.13.1

Parameterization

Preventing single-block stop
Stopping after every block when the "single block" function is active is not desirable in some
situations (e.g. during an ASUB).
The stopping at the end of a block during certain processes can be suppressed using the
following machine data:
MD10702 $MN_IGNORE_SINGLEBLOCK_MASK (prevent single-block stop)
MD20106 $MC_PROG_EVENT_IGN_SINGLEBLOCK (prog events ignore the single block)
MD20117 $MC_IGNORE_SINGLEBLOCK_ASUP (execute interrupt program completely in
spite of single block)
Sequence
If an ASUB is activated during the single block, for example, execution of the ASUB is
completed. The deceleration does not take place until after the end of the ASUB or the first
IPO block in which single-block suppression is not activated. If the velocity is too large for the
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
K1: Mode group, channel, program operation, reset response
9.13 Single block
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