Siemens SINUMERIK 840Di Function Manual page 659

Signals
Example:
It is possible to skip blocks that are not to be executed every time the program runs
(e.g., program test blocks):
/ ; block skipped, (DB21, ... DBX2.0) 1st skip level
/ N005 ; block skipped, (DB21, ... DBX2.0) 1st "
/0 N005 ; block skipped, (DB21, ... DBX2.0) 1st "
/1 N010 ; block skipped, (DB21, ... DBX2.1) 2nd "
/2 N020 ; block skipped, (DB21, ... DBX2.2) 3rd "
/3 N030 ; block skipped, (DB21, ... DBX2.3) 4th "
/4 N040 ; block skipped, (DB21, ... DBX2.4) 5th "
/5 N050 ; block skipped, (DB21, ... DBX2.5) 6th "
/6 N060 ; block skipped, (DB21, ... DBX2.6), 7th "
/7 N070 ; block skipped, (DB21, ... DBX2.7) 8th skip level
/8 N080 ; block skipped, (DB21, ... DBX31.6), 9th skip level
/9 N090 ; block skipped, (DB21, ... DBX31.7) 10th skip level
The 10 skip levels "/0" to "/9" are activated by the PLC setting the PLC -> NCK interface
signals.
The function is activated from the HMI via the "Program control" menu in the Machine
operating area for skip levels
• "/0" to "/7" via interface MMC -> PLC (DB21 to DB30) in DBB26.
• "/8" to "/9" via interface MMC -> PLC (DB21 to DB30) in DBX27.0 to DBX27.1.
References: /BAD/ Operator's Guide "Machine Operating Area"
Note
The levels to be skipped can only be changed when the control is in the Stop/Reset state.
control possible.
2.9.3 Adapting the size of the interpolation buffer
MD28060
The channelspecific interpolator executes prepared blocks from the interpolation buffer
during the part program run. The maximum number of blocks requiring space in the
interpolation buffer at any given point in time is defined by memoryconfiguring
MD 28060 $MM_IPO_BUFFER_SIZE. For some applications it may be meaningful not to use
the full buffer capacity in order to minimize the "interval" between preparation and
interpolation.
Mode Group, Channel, Program Operation, Reset Response (K1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Detailed Description
2.9 Program control
2-123