Detailed description
2.12 Block search
Basic logic functions: Auxiliary Function Output to PLC (H2)
46
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.12
Block search
2.12.1
Behavior on block search with calculation
Function
Block searches with calculation collect up auxiliary functions on a groupspecific basis. The
last auxiliary function in each auxiliary function group is output after NC-START, before the
actual reentry block, in a separate part program block that has the following output behavior:
•
Output duration one OB1 cycle (normal acknowledgment)
•
Output prior to motion
Output control
Whether or not the corresponding auxiliary function is output to the PLC after a block search
can be configured via bit 8 of the machine data:
MD22080 $MC_AUXFU_PREDEF_SPEC[index] (output specification)
MD22035 $MC_AUXFU_ASSIGN_SPEC[index] (output specification)
MD11110 $MN_AUXFU_GROUP_SPEC[index] (auxiliary function group specification)
This behavior does not affect the display and does not affect variables
$AC_AUXFU_M_STATE[n], $AC_AUXFU_M_VALUE[n], and $AC_AUXFU_M_EXT[n]. The
auxiliary function is always regarded as collected after a block search, even though it is not
output to the PLC. An auxiliary function that is not output after a block search also overwrites
an auxiliary function whose Bit 8 is not set during collection. The user can scan the collected
auxiliary functions after a block search and, under certain circumstances, output them again
by means of the subprogram or synchronous actions.
Auxiliary function without auxiliary function group
Auxiliary functions that are not assigned to an auxiliary function group are not collected up.
Auxiliary functions of auxiliary function group 1
Auxiliary functions of auxiliary function group 1 are never collected up.
Overstorage of auxiliary functions
After completion of a block search, the collected auxiliary functions are ouput on the next
NC-START. If it is necessary to output additional auxiliary functions, they can be added via
the "overstore" function. See Section: Response to overstore.
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...