Siemens SINAMICS S120 Function Manual page 596

Safety Integrated basic functions
10.5 Safe Stop 1 (SS1, time controlled)
Functional features of Safe Stop 1
SS1 is enabled by p9652 (delay time) ≠ 0.
● Setting parameter p9652 has the following effect:
– p9652 = 0
– p9652 > 0
● When SS1 is selected, the drive is braked along the OFF3 ramp (p1135) and STO/SBC is
automatically initiated after the delay time has expired (p9652).
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.
Note
Setting the delay time
So that the drive is able to travel down the OFF3 ramp completely and any motor holding
brake present can be applied, before the pulses have been safely deleted, the delay time
should be set as follows:
• Motor holding brake parameterized: Delay time p9652 ≥ p1135 + p1228 + p1217
• Motor holding brake not parameterized: Delay time p9652 ≥ p1135 + p1228
• The setting of parameter p1135 must be oriented towards the actual braking capability
● The timer (p9652) after whose expiration STO is activated, is implemented with two
channels, although deceleration along the OFF3 ramp is only one channel.
Requirement
● The Basic Functions are enabled via terminals and/or PROFIsafe:
– p9601 = 1, 8 or 9 (hex).
● In order that the drive can brake down to a standstill even when selected through one
channel, the time in p9652 must be shorter than the sum of the parameters for the data
cross-check (p9650 and p9658). Otherwise the drive will coast down after the time p9650
+ p9658 has elapsed.
Status of Safe Stop 1
The status of the "Safe Stop 1" (SS1) function is displayed using the parameters r9772,
r9872, r9773 and r9774.
As an alternative, the status of the function can be displayed using the configurable message
N01621 (configured using p2118 and p2119).
596
SS1 is not enabled. Only STO can be selected via the onboard terminals and
PROFIsafe.
SS1 is enabled. Only SS1 can be selected via the onboard terminals; with PROFIsafe,
a selection of SS1 and STO is possible.
of the drive.
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions