Adapting The Size Of The Interpolation Buffer - Siemens SINUMERIK 840D sl Function Manual
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K1: Mode group, channel, program operation, reset response
9.14 Program control
References:
Operating Manual
Note
The levels to be skipped can only be changed when the control is in the STOP/RESET state.
9.14.3
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 the memory configuring MD28060
$MM_IPO_BUFFER_SIZE (number of NC blocks in the IPO buffer (DRAM)). For some
applications it may be meaningful not to use the full buffer capacity in order to minimize the
"interval" between preparation and interpolation.
SD42990
The number of blocks in the interpolation buffer can be restricted dynamically to a smaller
value than in MD28060 $MC_MM_IPO_BUFFER_SIZE (number of NC blocks in the IPO buffer
(DRAM)), minimum 2 blocks, with the setting data SD42990
$SC_MAX_BLOCKS_IN_IPOBUFFER (max. number of blocks in the IPO buffer).
Values of setting data SD42990 $SC_MAX_BLOCKS_IN_IPOBUFFER:
Value
< 0
or 1
< < MM_IPO_BUFFER_SIZE
>= MM_IPO_BUFFER_SIZE
590
Effect
No interpolation buffer limit active.
The max. possible interpolation buffer as set in MD 28060: MM_IPO_BUF‐
FER_SIZE is activated.
The minimum permissible interpolation buffer with 2 blocks is activated.
The interpolation buffer is activated with no more than the maximum specified
number of blocks.
The interpolation buffer is activated with the number of blocks specified in MD
28060: MM_IPO_BUFFER_SIZE.
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
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