Siemens Sinumerik 840D sl Function Manual page 173

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Configurable stop responses
When a "safe software limit switch" is passed, then a stop response, which can be
configured using the following machine data, is generated:
for 840D sl:
MD36962 $MA_SAFE_POS_STOP_MODE
for SINAMICS S120:
p9562 SI Motion SLP (SE) stop response (Control Unit)
The user can select either STOP C, D or STOP E.
Effect
S The configured stop response is initiated
S The relevant alarm is displayed
Acknowledging and moving away
1. Withdraw the user agreement (SE is no longer active) or changeover to another
SE.
2. Acknowledge the stop and alarm response.
3. Bring the axis into a range in which the monitoring no longer responds.
Timing when the safe software limit switches are actuated
If the "safe software limit switches" function is active, the system timing is as
follows when the software limit switches are actuated (passed):
Figure 6-18 Timing when a software limit switch is actuated
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Safety functions integrated in the system/drive
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a) the end position is passed
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6.7 Safe software limit switches (SE)
not to scale
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