Behavior With Regard To Other Functions - Siemens SINUMERIK 840D sl Function Manual

F1: Travel to fixed stop
6.2 Detailed description
Function abort
A function abort can be triggered by the following events:
● Emergency stop
Note
NC and drive have no power during "Emergency stop", i.e. the PLC must react.
● Functional state: "Fixed stop not reached"
● Functional state: "Fixed stop aborted"
● Aborted by the PLC user program:
DB31, ... DBX62.4 = 0 ("Activate travel to fixed stop")
● Cancellation of the pulse enable and machine data parameterization:
MD37002 $MA_FIXED_STOP_CONTROL, bit 0 = 0 (see above)
6.2.5

Behavior with regard to other functions

Measurement with delete distance-to-go
"Travel to fixed stop" (FXS) cannot be programmed in a block with "Measurement with delete
distance-to-go" (MEAS). Except when on function acts on a path axis while the other acts on a
positioning axis or both functions act on positioning axes.
Contour monitoring
The axis contour monitoring function is inoperative while "Travel to fixed stop" is active.
Positioning axes
For "Travel to fixed stop" with positioning axes POSA, the block change is executed even when
the positioning axis has not yet reached the fixed stop by this time.
Vertical axes
The "Travel to fixed stop" function can be used for vertical axes even when alarms are active.
If a function-specific alarm occurs for a vertical axis when traveling to fixed stop, the NC/PLC
interface signal DB11, DBX6.3 (mode group ready) is not reset: This means that the
corresponding drive is not de-energized.
306
CAUTION
Dangerous machine situations possible for travel to limit stop
It must be ensured that no dangerous machine situations occur while travel to fixed stop
is active when an "Emergency stop" is triggered or reset.
For example, behavior when setting and canceling the pulse enable:
MD37002 $MA_FIXED_STOP_CONTROL, bit 0 (behavior for pulse disable at the stop)
● Bit 0 = 0: Travel to fixed stop is aborted
● Bit 0 = 1: Travel to fixed stop is interrupted, i.e. the drive is without power
Once the pulse disable is canceled again, the drive presses with the stop torque again.
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions