Safe Stop 1 With External Stop - Siemens SINAMICS S120 Function Manual

4.2.4.3

Safe Stop 1 with external stop

General description
NOTICE
Any axis motion is possible
During the delay time (p9652), for "Safe Stop 1 (time-controlled) with external stop", any
axis movements are possible.
• If there is a hazard due to unwanted motion in your application, take measures to
With external stop, "Safe Stop 1" basically works exactly as described in the previous
Chapters "Safe Stop 1 with encoder (time and acceleration controlled)" and "Safe Stop 1
without encoder (speed controlled)." Note, however, the following differences:
Differences between "Safe Stop 1 with OFF3" and "SS1 with external stop"
● In order to activate "Safe Stop 1 with external stop", additionally set p9507.3 = 1.
● When SS1 with external stop is selected, the drive is not braked along the OFF3 ramp:
You are responsible in applying suitable measures to brake the drive. After the delay time
has expired (p9556), only STO/SBC are automatically initiated. After the function has
been selected, the delay timer runs down - even if the function is deselected during this
time. In this case, after the delay time has expired, the STO/SBC function is selected and
then again deselected immediately.
● The brake ramp (SBR) and the acceleration (SAM) are not monitored and there is no
standstill detection.
● With this configuration, STO becomes active after the SS1 timer p9556 has expired; this
also applies if SBR has been configured.
● For additional information, see Chapter "Stop responses (Page 375)".
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
counter it, for example, by using a brake with safe monitoring. Further information can
be found in Section "Safe Brake Control (Page 102)".
Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
101