Siemens SINUMERIK 840D sl Function Manual page 1667

DB31, ...
DBX3.2 - DBX3.5 Activate fixed feedrate 1 - 4 for machine axes
Edge evaluation: No
Description These signals are used to select/de-select the function "fixed feed" and define which fixed feed should
be effective for machine axes.
Corresponding to ... MD12202 $MN_PERMANENT_FEED[n]
MD12200 $MN_RUN_OVERRIDE_0
DB31, ...
DBX4.3 Feed stop / spindle stop (axis-specific)
Edge evaluation: No
Signal state 1 or The signal is active in all modes.
edge change
Feed stop:
0 → 1
The signal triggers a "feed stop" for the axis. This signal brings all traversing axes to a standstill with
controlled braking (ramp stop). No alarm is output.
The signal triggers a "feed stop" for all path axes interpolating relative to each other when the "feed
stop" is activated for any one of these path axes. In this case, all the axes are brought to a stop with
adherence to the path contour. When the "feed stop" signal is canceled, execution of the interrupted
part program is resumed.
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 stop", this is kept. This queued travel
request is executed immediately after the "feed stop" is canceled.
If the axis is interpolating in relation to others, this also applies to these axes.
Spindle stop:
The spindle is brought to a standstill along the acceleration characteristic.
In the positioning mode, when the "Spindle stop" signal is set positioning is interrupted. The above
response applies with respect to individual axes.
Signal state 0 or Feed stop:
edge change
The feedrate is enabled for the axis.
1 → 0
If a travel request ("travel command") is active when the "feed stop" is canceled, this is executed
immediately.
Spindle stop:
The speed is enabled for the spindle.
The spindle is accelerated to the previous speed setpoint with the acceleration characteristic or, in
positioning mode, positioning is resumed.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Signal(s) updated: Cyclically
Signal(s) updated: Cyclically
Z1: NC/PLC interface signals
19.12 Feeds (V1)
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