Detailed Description
2.1 General functionality
Travel to Fixed Stop (F1)
2-6 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
The Travel to fixed stop function is deselected in response to both "Fixed stop not reached"
and "Fixed stop aborted".
Interrupts
If the fixed stop position is not reached when the function is active, alarm 20091 "Fixed stop
not reached" is output and a block change executed.
If a traversing request (e.g. from the parts program, the PLC, from compile cycles or from the
operator panel) is provided for an axis after the fixed stop has been reached, the alarm
20092 "Travel to fixed stop still active" is output and the axis is not moved.
If after reaching the fixed stop an axis is pushed out of position more than the indicated value
in SD FIXED_STOP_WINDOW (fixed stop monitoring window),
the alarm 20093 "fixed stop monitoring has responded" is output; the "travel to fixed stop"
function is then deselected for this axis and system variable $AA_FXS[x] is set to 2.
No termination during alarm
"Travel to fixed stop" continues to remain active during alarms,
if the bit value in the machine parameter:
MD37052 FIXED_STOP_ALARM_REACTION
has been set.
IS "Mode group ready" (DB11, ... DBX6.3) remains active.
Alarm suppression after new programming
Travel to fixed stop can be used for simple measuring processes.
For example, it is possible to carry out a check for tool breakage by measuring the tool
length by traversing onto a defined obstacle. To do so, the fixed stop alarm must be
suppressed. When the function for clamping workpieces is then used "normally", the alarm
can be activated using parts program commands.
Sequence in case of a fault or abnormal termination
The IS "Activate travel to fixed stop" (DB31, ... DBX62.4) is reset.
Depending on the machine parameter:
MD37060 FIXED_STOP_ACKN_MASK
the NC waits for the PLC to acknowledge by resetting IS
"Activate travel to fixed stop" (DB31, ... DBX3.1).
The torque limitation is then canceled and a block change executed.
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