Siemens SINAMICS S120 Function Manual page 110

Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
● The PROFIsafe status word S_ZSW2.28 indicates whether the SS2E function is active.
PROFIsafe status word S_ZSW2.28 is contained in telegrams 31, 901, 902 and 903. The
associated diagnostics parameter is r9722.28.
In the "Safety Info Channel", status word S_ZSW3B.11 indicates whether function SS2E
is active. The associated diagnostics parameter is r10234.11.
Diagnostic parameters p9722.28 and p10234.11 are also set during an internal STOP D.
● Effect on the "Setpoint speed limit effective" (r9733[0...2]):
For SS2E (≙ STOP D), setpoint 0 is specified in r9733[0...2].
Deselecting function SS2E while SS2E is active
Figure 4-8
After the function has been selected, the delay time starts to expire - even if the function is
deselected during this time. In this case, after the delay time has expired, the SOS function
is briefly active. Afterwards, the drive may accelerate the motor back to the speed setpoint.
Interruption of the active SS2E function by functions SS1 and SS2
Figure 4-9
When selecting SS1, the drive brakes the motor along the OFF3 ramp and monitors the
speed using the SAM function. Function STO becomes active when the motor is at a
standstill.
When selecting SS2, the drive also brakes the motor along the OFF3 ramp and monitors the
speed using the SAM function. Function SOS becomes active after time p9552.
108
Deselecting function SS2E while SS2E is active
Interruption of function SS2E by functions SS1 (shown at the left) and SS2 (at the right)
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated