Siemens SINUMERIK 840D sl Function Manual page 2130

Detailed Description
2.16 Feeds (V1)
DB21, ...
DBB5 Rapid traverse override
Corresponding to .... DB21, ... DBX6.6 (rapid traverse override active)
MD12050 $MN_OVR_FACTOR_RAPID_TRA[n] (evaluation of the path feed rate override switch)
MD12100 $MN_OVR_FACTOR_LIMIT_BIN (limit for binary coded override switch)
DB21, ...
DBX6.0 Feed disable
Edge evaluation: no
Signal state 1 or The signal is active in one channel in all operating modes.
edge change
The signal disables the feed for all of the axes (geometry and synchronized) that interpolate relative
0 → 1
to one another as long as G33 (thread) is not active.
All axes are brought to a standstill but still maintaining the path contour. When the feed disable is
canceled (0 signal), the interrupted part program is continued.
The signal triggers a feed disable for all positioning axes. This signal brings all traversing axes to a
standstill with controlled braking (ramp stop). No alarm is output.
The position control is retained, i.e. the following error is eliminated.
If a travel request is issued for an axis with an active "Feed disable", then this is kept. The queued
travel request is executed immediately when the "Feed disable" is canceled.
If the axis is interpolating in relation to others, this also applies to these axes.
Signal state 0 or The feed rate is enabled for all axes of the channel.
edge change
If a travel request ("travel command") exists for an axis or group of axes when the "feed disable" is
1 → 0
canceled, then this is executed immediately.
Application Stopping machining by selecting FEED OFF on the machine control panel.
example(s)
Special cases, The feed disable is inactive when G33 is active.
errors, ......
DB21, ...
DBX6.6 Rapid traverse override active
Edge evaluation: no
Signal state 1 or The rapid traverse override between 0 and a maximum of 100% entered in the PLC interface is
edge change channel-specific. The override factor is defined using the machine data:
0 → 1 MD12040 $MN_OVR_RAPID_IS_GRAY_CODE (rapid traverse override switch gray coded)
and
MD12050 $MN_OVR_FACTOR_RAPID_TRA [n] (evaluation of the rapid traverse override switch).
Signal state 0 or The rapid traverse override entered at the PLC interface is ignored.
edge change
When the rapid traverse override is inactive, the NC always uses 100% as the internal override
1 → 0
factor.
Exceptions are the zero setting for a binary interface and the 1st switch setting for a Graycoded
interface. In these cases, the override factors entered at the PLC interface are used. With a binary
interface, the override factor = 0. With a Graycoded interface, the value entered in the machine data
for the 1st switch setting is output as the override value.
134
Signal(s) updated: cyclic
Signal(s) updated: cyclic
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0