Siemens SINUMERIK 840D sl Function Manual page 2132

Detailed Description
2.16 Feeds (V1)
DB21, ...
DBX12.3, DBX16.3,
Feed stop (Geometry axis 1 to 3)
DBX20.3
Edge evaluation: no
Signal state 1 or The signal is only active in JOG mode.
edge change
The signal stops the feed of the geometry axis. This signal brings all traversing axes to a standstill
0 → 1
with controlled braking (ramp stop). No alarm is output.
The position control is retained, i.e. the following error is eliminated.
If - for a geometry axis - a travel request is issued with an active "feed stop", the request is kept.
This queued travel request is executed immediately after the "feed stop" is canceled.
Signal state 0 or The feed is enabled for the geometry axis.
edge change
If, for the geometry axis, a travel request ("travel command") is active when the "feed stop" is
1 → 0
cancelled, this is executed immediately.
DB21, ...
DBX24.6 Dry run feed rate selected
Edge evaluation: no
Signal state 1 or Dry run feed rate is selected.
edge change
Instead of the programmed feed rate, the dry run feed rate entered in setting data:
0 → 1
SD42100 $SC_DRY_RUN_FEED
is active.
When activated from the operator panel, the dry run feed signal is automatically entered in the PLC
interface and transmitted by the PLC basic program to the PLC interface signal:
DB21, ... DBX0.6 (active dry run feed).
Signal state 0 or Dry run feed rate is not selected.
edge change
The programmed feed rate is active.
1 → 0
Corresponding to .... DB21, ... DBX0.6 (activate dry run feed)
SD42100 $SC_DRY_RUN_FEED (dry run feed rate)
DB21, ...
DBX25.3 Feed rate override selected for rapid traverse
Edge evaluation: no
Signal state 1 or The feed rate override switch should also be active as rapid traverse override switch.
edge change
Override values above 100% are limited to the maximum value for 100% rapid traverse override.
0 → 1
The interface signal:
DB21, ... DBX25.3 (feed rate override for rapid traverse selected)
is automatically entered into the PLC interface from the operator panel
and transferred from the PLC basic program to the PLC interface signal:
DB21, ... DBX6.6 (rapid traverse override active).
Further, the interface signal:
DB21, ... DBB4 (feed rate override)
is copied from the PLC basic program to the interface signal:
DB21, ... DBB5 (rapid traverse override).
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Signal(s) updated: cyclic
Signal(s) updated: cyclic
Signal(s) updated: cyclic
Basic logic functions: NC/PLC interface signals (Z1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0