Siemens SINUMERIK 840D sl Function Manual page 434

Data descriptions
9.2 Parameters for SINAMICS S120
p9651 SI STO/SBC/SS1 debounce time (Control Unit)
Setting the debounce time for the Failsafe Digital Inputs to control STO/SBC/SS1.
The debounce time is rounded-off to whole milliseconds. It specifies the maximum
duration of a fault pulse at the Failsafe Digital Inputs with no associated reaction
on the selection or deselection of the Safety Basic functions.
Example:
Debounce time = 1 ms: Interference pulses of 1 ms are filtered, only pulses longer
than 2 ms are processed.
Debounce time = 3 ms: Interference pulses of 3 ms are filtered, only pulses longer
than 4 ms are processed.
Unit: Default value:
ms 0.00
p9652 SI Safe Stop 1 delay time (Control Unit)
Sets the delay time for STO for the function "Safe Stop 1" (SS1) on the Control
Unit to brake along the OFF3 down ramp (p1135).
So that the drive is able to travel along the OFF3 ramp completely before transition
into STO, the delay time should be set as follows:
Delay time >= p1135 + p1228
See also: p1135, p9852
For a crosswise data comparison between p9652 and p9852, a difference of one
safety monitoring clock cycle is tolerated.
The set time is internally rounded off to an integer multiple of the monitoring clock
cycle (r9780/r9880).
Unit: Default value:
s 0.00
434
Minimum value: Maximum value:
0.00 100.00
Minimum value: Maximum value:
0.00 300.00
Checksum: Protection level:
Yes 3
Data type: Effectiveness:
FloatingPoint32 When exiting the
SI commissioning
mode
Checksum: Protection level:
Yes 3
Data type: Effectiveness:
Floating Point32 When exiting the
SI commissioning
mode
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated