Siemens SINUMERIK 840Di Function Manual page 637

Note
In addition, there are NCK events that only stop for a short time to perform a switching
operation and then restart immediately.
These include e.g., the ASUB that stops the contour briefly in order to then start the
ASUB program immediately.
These events are also allowed in the stop delay area, however they are pushed back to its
end and are thus considered "soft stop events".
Boundary conditions
The following exceptions apply while a stop delay area is being processed:
• A change in the feed is ignored while in the stop delay area. A feed disable is thus not
• None of the main run axes, such as command axes and positioning axes, which are
• Part program command G4 is permitted in the stop delay area. Other part program
• If a STOP DELAY AREA with an override of 0% is entered, the STOP DELAY AREA will
Table 2-9 Summary of NCK events, which stop at least for short time
NCK events
Reset and mode group RESET
PROG_END
Interrupt
DELDISTOGO_SYNC
PROGRESETREPEAT
PROGCANCELSUB
SINGLEBLOCKSTOP
SINGLEBLOCK_IPO
SINGLEBLOCK_DECODIER
STOPALL
STOPPROG
OVERSTORE_BUFFER_END_
REACHED
PREP_STOP
PROG_STOP
STOPPROGATBLOCKEND
Mode Group, Channel, Program Operation, Reset Response (K1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
effective until the program area has been exited, and is stopped.
traversed with POSA, is stopped.
commands that cause a stop in the meantime (e.g., WAITM) are not permitted and trigger
"Alarm 16954".
not be accepted!
Response
immediate
Alarm 16954
delayed
immediate
delayed
delayed
delayed
delayed
delayed
immediate
delayed
Alarm 16954
Alarm 16954
Alarm 16954
delayed
Stop criteria
IS: DB21, ... DBX7.7 and DB11, ... DBX20.7
NC prog.: M30
IS: "FC-9" and ASUP DB10, ... DBB1
IS: "Delete distance-to-go" DB21, ... DBX6.2 and axial
IS: "Clear number of subprogram passes" DB21, ... DBX6.3
IS: "Program level abort" DB21, ... DBX6.4
In the stop delay area: NC stops at end of 1st block
outside stop delay area
Single-block already active before stop delay area:
IS: "NC Stop at block limit" DB21, ... DBX7.2
IS: "Activate single-block type 1" DB11, ... DBX21.7
IS: "Activate single-block type 2" DB11, ... DBX21.6
IS: DB21, ... DBX7.4 and DB11, ... DBX20.6
IS: DB21, ... DBX7.3 and DB11, ... DBX20.5
NC prog.: Stop because of empty overstore buffer
NC prog.: STOPRE and all implicit Stopres
NC prog.: M0 and M1
IS: "NC Stop at block limit" DB21, ... DBX7.2
Detailed Description
2.7 Program operation mode
2-101