Siemens SINUMERIK 840D sl Function Manual page 502

K1: Mode group, channel, program operation, reset response
9.8 Block search Type 5 (SERUPRO)
REPOS acknowledgement signals
The following NC/PLC interface signals can be used to acknowledge from the NC, functions
that control the REPOS response via PLC:
● DB21, ... DBX319.0 (REPOSMODEEDGEACKN) channel-specific
● DB21, ... DBX319.1-319.3 (Repos Path Mode Ackn0 to 2) channel-specific
● DB21, ... DBX319.5 (Repos DEFERRAL Chan) channel-specific
● DB31, ... DBX70.0 (Repos offset) axis/spindle
● DB31, ... DBX70.1 (Repos offset valid) axis/spindle
● DB31, ... DBX70.2 (Repos Delay Ackn) axis/spindle
● DB31, ... DBX76.4 (path axis) axis/spindle
For further information, see "REPOS offset in the interface"
REPOS acknowledgement operations
With the channel-specific NC/PLC interface signal:
DB21, ... DBX319.0 (REPOSMODEEDGEACKN)
a "handshake" is established by the interface signal:
DB21, ... DBX31.4 (REPOSMODEEDGE)
which is recognized by the NC and acknowledged with DB21, ... DBX319.0 to the PLC.
Note
If the NC has not yet acknowledged interface signal:
DB21, ... DBX31.4 (REPOSMODEEDGE)
with interface signal:
DB21, ... DBX319.0 (REPOSMODEEDGE)
a RESET in this situation causes the program to abort, and the REPOS that is to be used to
control the REPOSPATHMODE is not executed.
A REPOSMODE issued from the PLC is acknowledged by the NC using the following interface
signals:
● DB21, ... DBX319.1-319.3 (Repos Path Mode Ackn)
● DB31, ... DBX10.0 (Repos Delay)
● DB31, ... DBX70.2 (Repos Delay Ackn)
Example
A part program is stopped at N20 (→ time (2) in figure). The NCK stops according to the braking
ramp. After the PLC has specified the REPOSPATHMODE, the NCK accepts the
REPOSPATHMODE with the 0/1 edge of REPOSMODEEDGE at → Time (3). Repos Path
Mode Ackn remains set until the ASUB is initiated (→ Time (4)). The REPOS command is
started in the ASUB (→ Time (5)). The ASUB RESET block is activated again (→ Time (6)):
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Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions