Auxiliary Function Output With A Type 5 Block Search (Serupro) - Siemens SINUMERIK 840D sl Function Manual

H2: Auxiliary function outputs to PLC
8.13 Behavior during block search
The meaning of an S value in the part program depends on the feed type that is currently active:
G93, G94, G95, G97, G971:
G96, G961:
If the feed operation is changed (e.g. for a tool change) before output of the system variable
$P_SEARCH_S, the original setting from the target block in the part program must be restored
to avoid use of the wrong type of feed.
Collected direction of rotation
For output of the direction of rotation, the system variable $P_SEARCH_SDIR is assigned
default value "-5" at the start of the block search. This value has no effect on output.
This ensures that the last spindle operating mode is retained for a block search across program
sections in which spindles are not programmed with a direction of rotation, positioning or axis
mode.
The programming of M19, SPOS, and SPOSA is collected as "M-19" (internal M19) in the
system variables $P_SEARCH_SDIR as an alternative to M3, M4, M5, and M70.
For the output of "M-19", the positioning data is read internally from the system variables
$P_SEARCH_SPOS and $P_SEARCH_SPOSMODE. Both system variables can also be
written to, in order, for example, to make corrections.
Note
Because of the assignments described above (e.g. M[<n>] = $P_SEARCH_SDIR[<n>]), the
values "–5" and "–19" generally remain hidden from the user and only have to be observed in
the case of special evaluation of the system variables in the ASUB.
8.13.6

Auxiliary function output with a type 5 block search (SERUPRO)

Output behavior
In the case of type 5 block searches (SERUPRO), an auxiliary function can be output to the
PLC during the block search and/or collected on a group-specific basis in the following system
variables:
● $AC_AUXFU_PREDEF_INDEX[<n>] (index of a predefined auxiliary function)
● $AC_AUXFU_TYPE[<n>] (type of auxiliary function)
● $AC_AUXFU_STATE[<n>] (output state of the auxiliary function)
● $AC_AUXFU_EXT[<n>] (address extension of the auxiliary function)
● $AC_AUXFU_VALUE[<n>] (value of the auxiliary function)
For a description of the system variables, see Section "Querying system variables (Page 440)".
426
The S value is interpreted as the speed
The S value is interpreted as a constant cutting rate
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions