Siemens SINUMERIK 840D Function Manual page 663

NC/PLC interface signal
DB31, ... DBB0 (feed rate
override, axial)
DB31, ... DBB19 (spindle
override)
DB31, ... DBX4.3 (feedrate
stop / spindle stop)
DB31, ... DBX2.3 (clamping
in progress)
DB31, ... DBX2.1 (control sys‐
tem enable)
DB31, ... DBX21.7 (pulse en‐
able)
Note
Removal of the "Controller enable" and "Pulse enable" during traversing results in a rapid stop
of the axis and a reset alarm.
Interruption of a traversing motion
When a stop command is issued, the distance-to-go is saved and the handwheel pulses are
collected. When the stop condition no longer applies, the resulting distance is traversed.
Abort of a traversing motion
When a stop command is issued, the distance-to-go is deleted and the handwheel pulses are
ignored (i.e. not collected) until the stop condition no longer applies.
Behavior in the event of a safe operating stop
Analog to the NC/PLC interface stop signals, the behavior in the event of a stop can also be
adjusted by activating the safe operating stop (SBH):
Stop condition
Safe operating stop in
the event of active tar‐
get velocity limit
In the default setting, Bit 12 is set to "1", i.e. in the event of a stop resulting from activation of
the safe stop, current movements are aborted and new handwheel pulses ignored.
Prerequisite for an interpolatory stop is an active target velocity limit (i.e., MD36933
$MA_SAFE_DES_VELO_LIMIT > 0).
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Scope
Machine axis, not spindle
Spindle
Geometry axis / machine axis
Geometry axis / machine axis
Geometry axis / machine axis
Geometry axis / machine axis
Scope
Machine axis
17.6 Manual traversing using a handwheel
MD32084 $MC_HANDWH_CHAN_STOP_COND
Bit == 0
Override == 0: Interruption
Override == 0: Interruption
Interruption
No effect
Interruption
Interruption
MD20624 $MC_HANDWH_CHAN_STOP_COND
Bit 12 == 0
Interruption
H1: Manual traversing
Bit == 1
Override == 0: Abort
Override == 0: Abort
Abort
Abort
Abort
Abort
Bit 12 == 1
(Default setting)
Abort
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