Ss1 (Extended Functions) With External Stop; Function Diagrams And Parameters - Siemens SINUMERIK MC Commissioning Manual

4.3.1.3

SS1 (Extended Functions) with external stop

General description
Unexpected axis motion when the SS1E function is active
When the SS1E function is active, during the monitored delay time, axis motion that is not
monitored can occur. This can result in death or severe injury.
● Prevent persons from entering the hazardous area around the axis, e.g. by providing
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.
● Further information can be found in Section Extended Functions (Page 330).
Constraint
Note
The function is configurable - however, the braking behavior using SS1E is not supported by
the NC (path stop).
4.3.1.4

Function diagrams and parameters

Function diagrams (see SINAMICS S120/S150 List Manual)
● 2819
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
WARNING
protective doors or other suitable protective equipment.
SI Extended Functions - SS1, SS2, SOS, internal STOP B, C, D, F
Safety functions integrated in the drive
4.3 SS1
103