Siemens SINUMERIK 840D sl Function Manual page 779

Marginal conditions
The PLC must already have accepted control of the axis/spindle. Else, the following
NC/PLC-interface signal is ignored:
NST DB31, ... DBX28.6 (AxStop, stop)
Use Case 3
Resume axis/spindle motion
The axis/spindle motions controlled by the main run and interrupted according to use case 2
"Stop axis" are resumed.
Description of operational sequence:
● PLC requests the NCK to resume motion on the relevant axis with NST:
● NCK checks whether an axis/spindle axial alarm with the cancel criterion
● NCK checks whether the axis motion can be resumed - no interlocking due to an alarm -
● The axis motion is resumed and the PLC notified of the status change via the VDI
● NCK ends this operation.
Alternatives
The axis/spindle is executing several operating sequences:
● Resume all operating sequences.
● Following motions are dependent on the leading axis motion.
Marginal conditions
The NCK detects the following fault scenarios:
● When the PLC prompts the axes/spindles to continue moving and this axis/spindle has
● If the axis/spindle is not in a stopped state, the NST DB31, ... DBX28.2 (AXRESUME) is
● If the motion of the axis/spindle must not be continued due to an active alarm, the NST
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
DB31, ... DBX28.2 (AXRESUME) == 1.
CANCELCLEAR or NCSTARTCLEAR is active and deletes it.
and switches it to the active state.
interface (NCK→PLC) as follows:
DB31, ... DBX63.2 (Axis stop active) == 0,
DB31, ... DBX64.7 (Motion command plus) == 1 or
DB31, ... DBX64.6 (Motion command minus) == 1 and
DB31, ... DBX60.7 (Exact stop fine) == 0 or
DB31, ... DBX60.6 (Exact stop coarse) == 0
Axis status active with system variable $AA_SNGLAX_STAT == 4.
not been accepted by the PLC, the IS DB31, ... DBX28.2 ("AXRESUME") is ignored.
ignored.
DB31, ... DBX28.2 (AXRESUME) is ignored.
11.3 Motion behavior and interpolation functions
P2: Positioning axes
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