Siemens SINUMERIK 802D sl Function Manual page 77

The NC then executes a block change or considers the positioning motion to be completed,
but still leaves a setpoint applied to the drive actuator to allow the clamping torque to take
effect.
The fixed stop monitoring function is activated as soon as the stop position is reached.
Monitoring window
If no torque was programmed in the block or since the beginning of program, the value
entered in the MD37010 FIXED_STOP_TORQUE_DEF (default setting for clamping torque)
applies.
If the axis leaves the position it was in when the fixed stop was detected, then alarm 20093
"Fixed stop monitoring has responded" is displayed and the "Travel to fixed stop" function
deselected.
The window must be selected by the user such that the alarm is activated only when the axis
leaves the fixed stop position.
Enabling the fixed stop alarms
MD37050 FIXED_STOP_ALARM_MASK can suppress the output of the following alarms:
● 20091 "Fixed stop not reached"
● 20094 "Fixed stop aborted"
Fixed stop is not reached
If the programmed end position is reached without the "Fixed stop reached" status being
recognized, then the torque limit in the drive is cancelled and IS "Activate travel to fixed stop"
is reset.
Depending on MD37060 FIXED_STOP_ACKN_MASK, the NC waits for the PLC to
acknowledge by resetting IS "Activate travel to fixed stop"; the program then advances to the
next block.
Function abort
If the "Travel to fixed stop" function is aborted owing to a pulse cancellation command,
cancellation of PLC acknowledgments or a Reset in the approach block, the display or
suppression of alarm 20094 can be controlled via MD37050 FIXED_STOP_ALARM_MASK.
Abort without alarm
The PLC can initiate travel to fixed stop without an alarm in the approach block (for example,
when the operator actuates a key) if alarm 20094 is suppressed in MD37050
FIXED_STOP_ALARM_MASK.
The Travel to fixed stop function is deselected in response to both "Fixed stop not reached"
and "Fixed stop aborted".
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Travel to fixed stop (F1)
5.2 Functionality
77