Siemens SINUMERIK 840D sl, Function Manual

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Detailed description
2.12 Block search
Basic logic functions: Auxiliary Function Output to PLC (H2)
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Function Manual, 11/2006, 6FC5397-0BP10-2BA0
System variables
The spindle-specific auxilary functions are always stored in the following system variables on
block search, irrespective of the programming described above:
System variable Description
$P_SEARCH_S [ n ] Accumulated spindle speed,
Value range = { 0 ... Smax }
$P_SEARCH_SDIR [ n ] Accumulated spindle direction of rotation,
Value range = { 3, 4, 5, -5, -19, 70 }
$P_SEARCH_SGEAR [ n ] Accumulated spindle gear level M function,
Value range = { 40 ...
$P_SEARCH_SPOS [ n ] Accumulated spindle position,
Value range = { 0 ... MD30330 $MA_MODULO_RANGE (size of
the module range)}
Accumulated traversing path,
Value range = { -100,000,000 ...
$P_SEARCH_SPOSMODE [ n ] Accumulated position approach mode,
Value range = { 0 ...
For later output of the spindle-specific auxiliary functions, the system variables can be read
in an ASUB, for example, and output after the action blocks are output:
DB21, ... DBX32.6 = 1 (Last action block active)
Note
The contents of the system variables $P_S, $P_DIR and $P_SGEAR may be lost after block
search due to synchronization operations.
More detailed information on ASUB, block search, and action blocks is to be found in:
References:
/FB1/ Function Manual Basic Functions; Mode Group, Channel, Program Operation (K1),
Section: Program test