Technical data

Safety Integrated Functions
8.3 System features
Function Manual
Function Manual, 06/2012, 6SL3097-4AB10-0BP4
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8.3.4 Probability of failure for safety functions
The probabilities of safety function failure must be specified in the form of a PHF value
(Probability of Failure per Hour) to IEC 61508, IEC 62061 and ISO 13849-1. The PFH value
of a safety function depends on the safety concept of the drive unit and its hardware
configuration, as well as on the PFH values of other components used for this safety
function.
Corresponding PFH values are provided for the SINAMICS S110 drive unit, depending on
the hardware configuration (control type, ...). The various integrated safety functions are not
differentiated.
The PHF values can be requested from your local sales office.
8.3.5 Response times
Note
You can only see the actual value of the monitoring clock cycle (r9780), if you are connected
ONLINE with the drive. However, for an initial calculation of the response times you can use
the value r9780 = 2 ms.
Controlling the Basic Functions
Control of the Basic Functions via terminals
The table below shows the control response times via terminals.
Table 8- 3 Response times when controlling the Basic Functions via terminals
Function Typical
1)
Worst case
1)
STO 2 x r9780 + t_E 7 x r9780 + t_E
SBC 4 x r9780 + t_E 11 x r9780 + t_E
SS1 (time controlled)
Selection until STO is initiated 2 x r9780 + p9652 + t_E 7 x r9780 + p9652 + t_E
SS1 (time controlled)
Selection until SBC is initiated 4 x r9780 + p9652 + t_E 11 x r9780 + p9652 + t_E
For t_E (debounce time of the digital input F-DI 0):
p9651 = 0 t_E = p0799 (default = 4 ms)
p9651 ≠ 0 t_E = p9651 + 1 ms