Behavior For Reset And Function Abort; Behavior With Regard To Other Functions - Siemens SINUMERIK 840D Function Manual

F1: Travel to fixed stop
3.2 Detailed description
3.2.4

Behavior for reset and function abort

NC reset
As long as the function is still not in the "Successful travel to fixed stop" state, the travel to fixed
stop can be aborted with NC reset.
Even when the fixed stop has already has been approached, but the specified stop torque not
yet fully reached, then the function can still be aborted with NC reset. The position setpoint of
the axis is synchronized with the current actual position.
As soon as the function is in the "Successful travel to fixed stop" state, the function also remains
active after the NC reset.
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)
3.2.5

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.
104
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.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA