F1: Travel to fixed stop
6.2 General functionality
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
307
The rise time of the torque corresponds to the time needed by the current controller of the drive to reach the
limitation again.
If the pulses are deleted when a deselection is active (waiting for PLC acknowledgments), the torque limit will be
reduced to zero. If the pulses are reactivated during this phase, torque is no longer built up. Once the deselection
has been completed, you can continue traversing as normally.
FXS commands programmable in synchronized actions
The parts program commands FXS, FXST and FXSW can be programmed in synchronized actions/technology
cycles.
The function FXS[x]=1 can also be activated without movement; the torque is limited immediately. As soon as
the axis is moved via a setpoint, the limit stop monitor is activated.
In static and block related synchronized actions, the same commands FXS, FXST, FXSW can be used as in the
normal parts program run. The values assigned can result from a calculation.
Ramp for torque limitation with MD37012
A ramp has been implemented so that the setting of a torque limit is not to jerky.
For this in the machine data:
MD37012 $MA_FIXED_STOP_TORQUE_RAMP_TIME
defining the length of the ramp until the new torque limit is reached.
6.2.2 Response to RESET and function abort
Response to RESET
During selection (fixed stop not yet reached) the function FXS can be aborted with RESET. The termination is
carried out such that an "almost achieved" fixed stop (setpoint already beyond the fixed stop, but still within the
threshold for the fixed stop detection) will not result in damage.
This is achieved by synchronizing the position setpoint to the new actual position. As soon as the fixed stop is
reached, the function remains operative even after RESET.
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