Siemens SINUMERIK 840D sl Function Manual page 566

K1: Mode group, channel, program operation, reset response
9.10 Asynchronous subprograms (ASUBs), interrupt routines
MD11602 $MN_ASUP_START_MASK.bit 3
Note
Multi-channel systems
In multi-channel systems, the following machine data must also be set:
MD11600 $MN_BAG_MASK, bit 1 = 1
Continuation of the ASUB
After manually traversing the axes, NC Start must be initiated by the operator. The axes are
automatically traversed to the interruption point (REPOS). The ASUB is then continued at the
interruption point.
Application example
In case of a single-slide turning machine a stock removal cycle is started as ASUB in the JOG
mode and with this a shaft several meters long is machined. During machining it is necessary
to change the cutting edge of the tool. The machine operator stops the ASUB and retracts the
axes manually using the traversing keys in order to change the cutting edge of the tool. After
changing the cutting edge, the operator activates NC Start. Repositioning at the interruption
point is performed with the REPOS operation. Thereafter, the ASUB is continued.
Supplementary condition
Manual traversing of axes during the interruption of an ASUB in JOG mode is only possible if
the ASUB has been activated from the program state "Aborted", channel state "Reset".
Effectiveness of the parameterized start enables
The user-specific interrupt signals are assigned the priorities 1 - 8, with 1 = highest priority
(see Section "Programming (Page 568)"). Starting from the highest, up to which priority the
parameterized start enables apply for the associated ASUB is defined with the following
machine data:
MD11604 $MN_ASUP_START_PRIO_LEVEL = <priority>
Behavior with read-in disable
The following channel-specific machine data is used to set for each interrupt signal whether
the assigned ASUB is processed despite a set read-in disable (DB21, ... DBX6.1 = 1), or
whether the read-in disable is to apply:
MD20116 $MC_IGNORE_INHIBIT_ASUP, bit 0 - bit 31
Bit x is assigned to the interrupt signal (x+1).
Supplementary conditions
The settings in MD20116 $MC_IGNORE_INHIBIT_ASUP have no effect if the read-in disable
in the ASUB is always to be ignored:
MD11602 $MN_ASUP_START_MASK, bit 2 = 1
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions